B08_Attachment_15_Cleaning_Tests_Lincoln_Bridge_FINAL.pdf

CLEANING TESTS

LINCOLN MEMORIAL BRIDGE

GEORGE ROGERS CLARK NATIONAL HISTORIC PARK

Prepared for

DHM Design

Denver, CO

Prepared by:

Jablonski Building Conservation, Inc.

40 West 27th Street, 12th Floor

New York, NY 10001

May 2023

Lincoln Memorial Bridge, George Rogers National Historic Park Cleaning Tests

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Architectural Conservators i

Table of Contents Introduction

Methodology

Findings

Conclusions

Recommendations

Appendix A: Product Data Sheets

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INTRODUCTION

Jablonski Building Conservation, Inc. (JBC) was retained by DHM Design to perform cleaning tests on the granite stones removed from the Lincoln Memorial Bridge located in the George

Rogers Clark National Historic Park in Vincennes, Indiana. Conservators Danielle Pape and Olivia

Manfredi performed the tests from May 8 to May 11, 2023. Soiling conditions included general and heavy soiling, ferrous stains, black stains, and carbonate deposits.

Tests were conducted on the granite units that were removed from the bridge and held in the storage yard. Stones for testing were selected by JBC based on the soiling conditions present.

METHODOLOGY

General Soiling and Heavy Black Stain Removal

Eleven (11) cleaners were tested to remove the general soiling and heavy black stains from the granite:

1. CSP Heavy Duty Cleaner, undiluted, 5-minute dwell;

2. CSP Light Duty Cleaner, undiluted, 5-minute dwell;

3. Sure Klean Light Duty Restoration Cleaner, undiluted, 5-minute dwell.

4. D/2, undiluted, 5-minute dwell;

5. Enviro Klean ReKlaim, undiluted, 5-minute dwell; and

6. Enviro Klean ReVive, undiluted, 5-minute dwell.

7. CSP Heavy Duty Cleaner, undiluted, 5-minute dwell;

8. CSP Light Duty Cleaner, undiluted, 5-minute dwell;

9. Sure Klean Light Duty Restoration Cleaner, undiluted, 5-minute dwell;

10. CSP Light Duty Paint Remover, undiluted, overnight dwell; and

11. Smart Strip, undiluted, overnight dwell.

Cleaners 1, 2, 3, 7, 8, and 9 were applied to a pre-wet surface using brushes. The biological growth removers (4, 5, and 6) were brush-applied to a dry surface. The cleaners were allowed to dwell for their allotted times before being scrubbed and rinsed with clean water from a pump sprayer. The cleaners were reapplied during the dwell time to prevent the surface from drying out. The treated surfaces were rinsed until the pH of the surfaces was equal to that of the rinse water (approximate pH of 6).

Cathedral Stone Light Duty Paint Remover (10) and Smart Strip (11) were applied to a dry surface as per the manufacturer’s written instructions. The strippers were applied using brushes and plastic spatulas to a thickness of approximately 1/8-inch. They were allowed to dwell for approximately 20 hours before being removed from the test areas. The cleaners were removed by scraping the

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Architectural Conservators 2 film off the granite surface. The test areas were scrubbed free of residues and rinsed until the pH of the surfaces was equal to that of the rinse water (approximate pH of 6).

Ferrous Stain Removal

Ten (10) cleaners were tested to remove the ferrous stains from the granite. In addition to iron stain removers, the general and heavy soiling cleaners were also tested.

1. CSP Heavy Duty Cleaner, undiluted, 5-minute dwell;

2. Sure Klean Light Duty Restoration Cleaner, undiluted, 5-minute dwell;

3. Artisan Heavy Duty Rust Remover, 5-minute dwell

4. CSP Light Duty Rust Remover, undiluted, 5-40-minute dwell;

5. CSP Heavy Duty Rust Remover, undiluted, 5-minute dwell

6. CSP Oxidation Remover, undiluted, 5-40-minute dwell;

7. Sure Klean Ferrous Stain Remover, undiluted, 5-minute dwell;

8. Iron Out Outdoor, undiluted, 5-minute dwell.

9. Sure Klean Iron Stain Remover Poultice, 4-hour dwell; and

10. Sure Klean Iron Stain Remover Poultice, overnight dwell.

All the liquid cleaners were applied to a wet surface with a chip brush and were allowed to dwell for their allotted time. The cleaners were reapplied during the dwell time to prevent the surface from drying out. The cleaners were thoroughly rinsed with a scrub brush and clean water from a pump sprayer. The surface was rinsed until the pH of the surfaces was equal to that of the rinse water (approximate pH of 6).

Sure Klean Iron Stain Remover was mixed with Sure Klean Marble Poultice Powder or kaolin clay to form a paste-like consistency. Using a spatula, a uniform layer of the poultice was applied to a thickness between 1/8 and 1/4-inch thick. Care was taken to ensure that there were no voids between the poultices and the masonry surface. The poultices were allowed to dry overnight before removing with plastic spatulas. The test areas were scrubbed free of residues and rinsed with clean water. The test areas were rinsed until the pH of the surfaces was equal to that of the rinse water

(approximate pH of 6).

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Carbonate Crust Removal

Three (3) cleaners were tested to remove the carbonate crusts from the granite pavers.

1. SB 2375 Concrete and Grout Remover, undiluted, 20-minute dwell.

2. SB 2376 Calcium Remover, undiluted, 20-minute dwell; and

3. SB 2377 HD Concrete, Mineral & Efflorescence Remover, undiluted, 20-minute dwell.

The heavy carbonate deposits were first thinned mechanically using a hammer and chisel. The cleaners were applied to a dry surface using brushes. The cleaners were continually applied and scrubbed for 20 minutes to increase the efficacy of the product. The treated surfaces were rinsed with clean water from a pump sprayer until the pH of the surfaces was equal to that of the rinse water (approximate pH of 6).

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FINDINGS

Tests were conducted on Stone #2119 and Stone #2053, both located in Row 8, to try to remove the black staining. As the nature of the stain was unknown, general soiling cleaners, biological growth removers, and paint strippers were tested. General soiling cleaners and biological growth removers were tested on Stone #2119. Paint strippers were tested on Stone #2053. A mockup of the best cleaner was then performed on the entire surface of Stone #3115.

General Soiling and Biological Growth Remover Tests (Stone #2119)

CSP Heavy Duty Cleaner (D) and Sure Klean Light Duty Restoration Cleaner (F) most successfully cleaned the granite. Enviro Klean ReKlaim (A) removed the majority of the stain though some resides remained. Enviro Klean ReVive (B), D/2 (C), and CSP Light Duty Cleaner

(E) removed some but not all the stain. (Figures 1 and 2)

Figure 1: Heavy Biological Growth Removal Tests, before.

A) Enviro Klean ReKlaim, B) Enviro Klean ReVive, C)

D/2, D) CSP Heavy Duty Cleaner, E) CSP Light Duty

Cleaner, F) Sure Klean Light Duty Restoration Cleaner.

Figure 2: Heavy Biological Growth Removal Tests, after.

A) Enviro Klean ReKlaim, B) Enviro Klean ReVive, C)

D/2, D) CSP Heavy Duty Cleaner, E) CSP Light Duty

Cleaner, F) Sure Klean Light Duty Restoration Cleaner.

A A

B

C

B

C D

E F

B

C D

E F

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Paint Stripper Tests (Stone #2053)

The CSP Light Duty Paint Remover (B) worked better than the Smart Strip (A) (Figures 5 and 6).

However, the CSP Light Dury Paint Remover required a longer dwell time and more scrubbing than the more successful soiling removal products tested on Stone #2119.

Figure 3: Paint stripper tests, before. Smart Strip on left, CSP Light Duty Paint Stripper on right.

Figure 4: Paint stripper tests, after. Smart Strip on left, CSP Light Duty Paint Stripper on right.

Full Unit Cleaning Test

Based on the results of the initial tests, CSP Heavy Duty Cleaner was tested to clean the full surface of Stone #3115. Stone #3115 contained general soiling and black staining. This cleaner successfully removed the soiling. The carbonate crust present on the left side of the stone was reduced from the CSP Heavy Duty Cleaner but was also used to test carbonate removal methods

(see Figures 26 and 27 for results).

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Figure 5: CSP Heavy Duty Cleaner on Stone #3115, before

Figure 6: CSP Heavy Duty Cleaner on Stone #3115, after.

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Iron Stain Removal Tests

Multiple cleaners with multiple applications and combinations were tested to remove the iron stains. The results of each test determined the products used in subsequent testing.

Initial Tests

The first set of tests was performed on Stone #64 located in Row 14. Of the seven products tested, the CSP Heavy Duty Cleaner (A), CSP Light Duty Rust Remover (B), CSP Oxidation Remover

(D), and Artisan Heavy Duty Rust Remover (F) worked well to remove the iron staining. CSP

Heavy Duty Rust Remover (C), Sure Klean Ferrous Stain Remover (E), and Iron Out Outdoor (G) did not remove all the stain. (Figures 7 and 8)

Figure 7: Ferrous stain removal tests, before. From left to right: A) CSP Heavy Duty Cleaner, B) CSP Light Duty Rust

Remover, C) CSP Heavy Duty Rust Remover, D) CSP Oxidation Remover, E) Sure Klean Ferrous Stain Remover, F)

Artisan Heavy Duty Rust Remover, G) Iron Out Outdoor.

Figure 8: Ferrous stain removal tests, after. From left to right: A) CSP Heavy Duty Cleaner, B) CSP Light Duty Rust

Remover, C) CSP Heavy Duty Rust Remover, D) CSP Oxidation Remover, E) Sure Klean Ferrous Stain Remover, F)

Artisan Heavy Duty Rust Remover, G) Iron Out Outdoor.

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Second Round of Tests

The best general soiling cleaners—Sure Klean Light Duty Restoration Cleaner and CSP Heavy

Duty Cleaner—were tested on Stone #480 to determine if general cleaning would remove or reduce the iron stain. CSP Heavy Duty Cleaner significantly lightened the iron stain.

Figure 9: Iron stain removal, before. Sure Klean Light

Duty Restoration Cleaner

Figure 10: Iron stain removal, after. Sure Klean Light

Duty Restoration Cleaner.

Figure 11: Iron stain removal before, CSP Heavy Duty

Cleaner.

Figure 12: Iron stain removal, after. CSP Heavy Duty

Cleaner.

A A

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The area cleaned with the CSP Heavy Duty Cleaner was further tested to try to remove the residual stain. The area was subdivided into three sections: Section B1 (CSP Heavy Duty Cleaner), Section

B2 (CSP Light Duty Rust Remover) and Section B3 (CSP Oxidation Remover). Two 15-minute applications of the cleaners had similar levels of performance, with the CPS Oxidation Remover

(B3) performing the best. The stain was greatly reduced. However, when the stone is dry, the stain is light. When the stone is wet, the stain is more apparent. (Figures 13 through 16).

Figure 13: Iron stain removal before. From left to right:

B1) CSP Heavy Duty Cleaner, B2) CSP Light Duty Rust

Remover, B3) CSP Oxidation Remover.

Figure 14: Iron stain removal. From left to right: B1)

CSP Heavy Duty Cleaner, B2) CSP Light Duty Rust

Remover, B3) CSP Oxidation Remover.

Figure 15: Test area, dry.

Figure 16: Test area, wet.

B1 B2 B3

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Additional tests were performed on Stone #491. Again, a combination of cleaners weas tested.

The area was first cleaned with CSP Heavy Duty Cleaner. Then, the area was divided in half. One half was cleaned with CSP Light Duty Rust Remover (A); the other half was cleaned with CSP

Oxidation Remover (B). Of the two, the Oxidation Remover worked the best. A halo of lighter granite around the stain was apparent after cleaning; however, it is possible that the halo was present before the test.

Figure 17: Iron stain both sections before Round 1) CSP

Heavy Duty Cleaner.

Figure 18: Iron stain both sections after Round 1) CSP

Heavy Duty Cleaner.

Figure 19: Wet iron stain after. From left to right: A)

CSP Light Duty Rust Remover and B) CSP Oxidation

Remover.

Figure 20: Dry iron stain after. From left to right: B) CSP

Oxidation Remover.

A B A B

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Poultice Testing

Sure Klean Iron Stain Remover Poultices were tested on stone #494. The entire stone was first cleaned with CSP Heavy Duty Cleaner followed by two applications of Sure Klean Iron Stain

Remover Poultice. The first application had a five-hour dwell time, and the second application was left overnight. Test A used kaolin clay for the poultice; test B used Sure Klean Marble Poultice

Powder. It appeared that the combination of products used for test B removed the stain the best;

however, test area B had a lighter stain to start. (Figures 21 through 23)

Figure 21: Stone #494, Iron stain test before

Figure 22: Iron stain removal after cleaning with CSP Heavy Duty Cleaner followed by A) Sure Klean Iron Stain Remover poultice with kaolin clay, and B) Sure Klean Iron Stain Remover poultice with Sure Klean Marble Poultice Powder for a five-hour dwell.

A

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Figure 23: Iron stain removal after second overnight application of poultices. A) Sure Klean Iron Stain Remover poultice with kaolin clay, and B) Sure Klean Iron Stain Remover poultice with Sure Klean Marble Poultice Powder.

Heavy Iron Stain Removal

Tests to remove heavy iron stain deposits were performed on a section of Stone #63. The test area was divided into two sections. Section A received an overnight application of Sure Klean Iron

Stain Remover Poultice. Section B was first cleaned with a 5-minute application of CSP Heavy

Duty Cleaner (the most successful general soiling remover) followed by two applications of the

Sure Klean Iron Stain Remover poultice.

One application of the Iron Stain Remover poultice had little to no effect. The CSP Heavy Duty

Cleaner removed most of the stain and the poultice continued to remove the areas of the worst staining. A second application of the poultice was used to try to completely remove the stain, though deep-seated, heavily stained areas remain.

Figure 24: Heavy ferrous staining tests, before.

Figure 25: Heavy staining tests, after. (A) Clean water followed by Sure Klean Iron Stain Remover Poultice. B)

CSP Heavy Duty Cleaner followed by 2 applications of

Sure Klean Iron Stain Remover Poultice.

A

B

A

B B

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Carbonate crust removal was tested on the edge of Stone #3115, which was first fully cleaned with

CSP Heavy Duty Cleaner (see Figure 6). The crust was first thinned using a hammer and chisel before the carbonate crust removal chemicals were applied. Of the three cleaners tested SB 2377

HD Concrete, Mineral & Efflorescence Remover (C) worked the best. (Figures 26 and 27)

Figure 26: Carbonate Crust Removal, before. Left to right:

A) SB 2375 Concrete and Grout Remover, B) SB 2376

Calcium Remover, C) SB 2377 HD Concrete, Mineral &

Efflorescence Remover.

Figure 27: Carbonate Crust Removal, after. Left to right:

A) SB 2375 Concrete and Grout Remover, B) SB 2376

Calcium Remover, C) SB 2377 HD Concrete, Mineral &

Efflorescence Remover.

CONCLUSIONS

Based on the results of the cleaning, CSP Heavy Duty Cleaner was the most successful product in removing the general soiling, light to moderate iron stains, and biological growth from the granite.

While these cleaners removed light iron stains during the testing program, spot treatments of heavy stains are required. Therefore, Sure Klean Marble Poultice Powder mixed with Sure Klean Iron

Stain Remover is recommended for spot treatment of heavy ferrous stains.

Mechanical thinning/removal of carbonate crusts followed by an undiluted application of SB 2377

HD Concrete, Mineral & Efflorescence Remover cleaned the majority of the carbonate deposits from the stone.

Prior to full-scale implementation of the cleaning procedures, the contractor must perform mock-ups. The mock-ups will provide a better understanding of the effect of the cleaners as well as fine tune any application methods and exposure times.

B B

C C

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RECOMMENDATIONS

The following cleaning recommendations are based on the results of the cleaning tests. Adjacent materials and surfaces that are not being cleaned should be protected from contact with chemicals.

When handling chemicals, proper personal protective equipment (PPE) such as rain suits, gloves, and eye protection should be worn. For proprietary cleaning products, follow all manufacturers’ instructions regarding application and safety. Collect and dispose of all chemicals and effluent according to all federal, state, and local regulations.

JBC recommends that the cleaning be performed in the following order:

1. General and heavy soiling removal

2. Spot treatment of residual metallic stains

3. Carbonate crust removal

Product

CSP Heavy Duty Cleaner, manufactured by Cathedral Stone Products, Inc.

Procedure

1. Prewet the surface to be cleaned.

2. Apply a thick, even layer of the cleaner using acid-resistant brushes or rollers. Gently scrub the surface to improve results.

3. Allow the cleaner to dwell for the time established during testing and mockups. For the

CSP Heavy Duty Cleaner, the dwell time should be 5 minutes. Do not let the cleaner dry on the surface. If drying occurs, lightly wet the surface with fresh water and reapply the cleaner.

4. Scrub the treated surfaces to loosen soiling.

5. Rinse thoroughly with clean water. Pressure shall not exceed 1000psi. Rinse until the pH of the cleaned surface reads neutral (pH of 7) or equal to that of the rinse water.

Iron Stain Removal

Sure Klean Marble Poultice Powder mixed with Sure Klean Iron Stain Remover, manufactured by

Prosoco, Inc.

1. Mix the Sure Klean Marble Poultice Powder with Sure Klean Iron Stain Remover to a paste like consistency.

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2. Use a spatula to apply a uniform layer of the poultice between 1/8 and 1/4 inch thick to the desired area.

3. Ensure there are no voids between the poultice and the masonry surface then cover the poultice with plastic sheeting.

4. Allow the poultice to dwell for the time established during testing and mockups. For the poultice, dwell time should be overnight or approximately 20 hours.

5. Remove the plastic sheeting and allow the poultice to dry.

6. Once the poultice has fully dried, remove with plastic spatulas.

7. Lightly wet the surface and scrub with soft-bristled brushes.

8. Rinse thoroughly with clean water. Pressure shall not exceed 1000psi. Rinse until the pH

Mechanical removal using a hammer and chisel followed by SB 2377 HD Concrete, Mineral &

Efflorescence Remover, manufactured by Shore Corporation.

1. Carefully remove or thin heavy encrustations of carbonate deposits using a hammer and a sharp chisel. Be sure not to mar or scratch the granite surface. The intent is to cleave the deposit from the granite. Thinner deposits can be left as.

2. Apply the undiluted cleaner to the deposit. Allow the cleaner to dwell for at least 10 minutes. Periodically scrub and apply additional cleaner during the dwell period to facilitate removal. No metal brushes or scrapers are to be used. If necessary, the cleaner can dwell longer, based upon the results of mockups.

3. Rinse thoroughly with clean water. Pressure shall not exceed 1000psi. Rinse until the pH

4. Aim to remove 85% of carbonate deposits.

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Appendix A

Product Data Sheets

Lincoln Memorial Bridge

George Rogers National Historic Park

Cathedral Stone® Products, Inc. 7266 Park Circle Drive, Hanover Maryland 21076

(800) 684-0901 FAX: (410) 782-9155 WEBSITE: www.cathedralstone.com

CSP Heavy Duty Cleaner

The CSP Heavy Duty Cleaner is a safe gel based cleaner intended for the removal of severe black carbon staining, dirt, and grime on sandstone, unpolished granite, brick, concrete and brownstone.

When using on limestone, marble or any calcareous stone limit dwell times to 10-15 minutes. The product is designed for exterior use on buildings and monuments.

Features and Benefits

Biodegradable

Short dwell time

Gel clings to vertical surfaces

Brush, roll or spray apply

User friendly

No on-site mixing

Application Procedures Test Area Always prepare a test area prior to full application.

This will indicate the time required for project completion and suitability of product for effective cleaning of the substrate. Additionally, specific jobsite consumption rates can be calculated after the test area is completed.

Equipment and Tools This product can be applied by brush, roll or low-pressure spray (>300 psi). Natural bristle brushes work well on most surfaces while ¾” nap rollers can be used for smooth surfaces such as brick and marble. When spraying is desired an air driven or low voltage pump can be used. Hudson style sprayers are acceptable for small-scale spray applications. Other equipment required: brushes, masking tape, plastic (polyethylene) sheet, can be used for protecting surfaces not to be treated with CSP Heavy Duty Cleaner.

Preparation MASKING: Cover / protect areas where cleaning is not desired, including adjoining surfaces where over spray may travel. Plastic (polyethylene) sheets make a very effective barrier. The CSP Heavy Duty Cleaner will harm most aluminum and some glass surfaces. Protection is required! Plants should be covered before and during the application.

MIXING: If the product appears to have separated, thoroughly mix the CSP Heavy Duty Cleaner with a drill until it becomes homogeneous once again. DO

NOT SHAKE. DO NOT DILUTE.

Application

Apply a thick, even layer of Heavy Duty Cleaner onto a Surface Saturated Dry (SSD) substrate. A sprayer is the most effective means of application, however rolling on the cleaner will work as well. The minimum wet film thickness should be 5 mils. When applying Heavy Duty Cleaner by brush, the agitation will cause the product to be more effective. If gel begins to dry another coat of the cleaner may be applied directly on top of the existing one. If needed a stiff brush can be used to agitate tough stains. DO NOT ALLOW

PRODUCT TO COMPLETELY DRY ON

SUBSTRATE. If product begins to dry mist the substrate with water in a way that adds moisture but does not wash the cleaner off.

Dwell Time The time required for the CSP Heavy Duty Cleaner to adequately clean a substrate is approximately 5- 45 minutes. Apply test panels to determine the dwell time prior to full application of product. DO NOT

ALLOW TO DRY ON SUBSTRATE.

Removal and Cleanup After allowing the product to dwell, rinse the surface with copious amounts water (pressure washer).

Rinse the substrate well to ensure all cleaner residue is removed. Thoroughly clean and lubricate spray equipment per manufacturers instructions. This process should be done soon after the spraying has been completed

Safety Requirements Proper safety procedures should be followed at all times while handling this product. Refer to the Material Safety Data Sheet for important health/safety information before use. CSP Heavy Duty Cleaner is an acidic gel. It is essential to wear protective clothing and glasses while using this product.

masonRE G

Cathedral Stone® Products, Inc. 7266 Park Circle Drive, Hanover Maryland 21076 800-684-0901 FAX: 410-782-9155 WEBSITE: www.jahnmortars.com

Limitations Surface temperatures should be 40° to 95°F (5° to 32°C). The product performs effectively at lower temperatures (even at 40°F, 5°C), but the dwell time increases.

Packaging and Coverage Packaging: Approximately 5 gallons The product is engineered for thick film build up on vertical and overhead surfaces. Minimum wet film thickness should be 5 mils. Always test the substrate to ensure accurate coverage rates.

Typical coverage rates on a rough porous surface are between 80 and 120 sq. ft. per gallon. Coverage rates on a smooth nonporous surface are typically between 350 and 400 sq. ft. per gallon

Technical Data Appearance Clear to light yellow liquid

Specific Gravity 1

Boiling Point 97.2 pH 4.3

VOC content N/A

DO NOT ALLOW PRODUCT TO FREEZE!

Notice: The information contained herein is based on our own research and the research of others, and it is provided solely as a service to help users. It is believed to be accurate to the best of our knowledge.

However, no guarantee of its accuracy can be made, and it is not intended to serve as the basis for determining this product's suitability in any particular situation. For this reason, purchasers are responsible to make their own tests and assume all risks associated with using this product.

9/2016

Safety Data Sheet

09/30/2016 EN (English US) Page 1

SECTION 1: Identification of the substance/mixture and of the company/undertaking

1.1. Product identifier

Product name : CSP Heavy Duty Cleaner

1.2. Relevant identified uses of the substance or mixture and uses advised against

Use of the substance/mixture : Manufacturing

1.3. Details of the supplier of the safety data sheet

Cathedral Stone Products 7266 Park Circle Drive Hanover, MD 21076 T 410-782-9150

1.4. Emergency telephone number

Emergency number : 1-800-424-9300

SECTION 2: Hazards identification

2.1. Classification of the substance or mixture

Classification (GHS-US)

Acute Tox. 4 (Oral) H302 Acute Tox. 4 (Inhalation) H332 Skin Corr. 1B H314 Eye Dam. 1 H318

Full text of H-phrases: see section 16

2.2. Label elements

GHS-US labeling

Hazard pictograms (GHS-US) :

GHS05

GHS07

Signal word (GHS-US) : Danger

Hazard statements (GHS-US) : H302+H332 - Harmful if swallowed or if inhaled H314 - Causes severe skin burns and eye damage H318 - Causes serious eye damage

Precautionary statements (GHS-US) : P260 - Do not breathe dust/fume/gas/mist/vapors/spray P264 - Wash thoroughly after handling P270 - Do not eat, drink or smoke when using this product P271 - Use only outdoors or in a well-ventilated area P280 - Wear protective gloves/protective clothing/eye protection/face protection P301 + P312 - If swallowed: Call a poison center/doctor if you feel unwell P301 + P330 + P331 - If swallowed: rinse mouth. Do NOT induce vomiting P303 + P361 + P353 - If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower P304 + P340 - If inhaled: Remove person to fresh air and keep comfortable for breathing P305+P351+P338 - If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing P310 - Immediately call a poison center/doctor P312 - Call a poison center/doctor if you feel unwell P330 - Rinse mouth P363 - Wash contaminated clothing before reuse P405 - Store locked up P501 - Dispose of contents/container in accordance with local/regional/national/international regulations.

2.3. Other hazards

No additional information available

05/18/2015 EN (English US) 2/7

2.4. Unknown acute toxicity (GHS-US)

Not applicable

SECTION 3: Composition/information on ingredients

3.1. Substance

Not applicable

3.2. Mixture

Name Product identifier % Classification (GHS-US)

Ammonium bifluoride (CAS No) 1341-49-7 < 8 Acute Tox. 3 (Oral), H301 Skin Corr. 1B, H314 Eye Dam. 1, H318

Hydrochloric acid (CAS No) 7647-01-0 < 4 Acute Tox. 3 (Inhalation:gas), H331 Skin Corr. 1A, H314

Cellulose, 2-hydroxyethyl ether (CAS No) 9004-62-0 0.5 - 2 Not classified

Full text of H-phrases: see section 16

SECTION 4: First aid measures

4.1. Description of first aid measures

First-aid measures after inhalation : Remove person to fresh air and keep comfortable for breathing. Obtain medical attention if breathing difficulty persists.

First-aid measures after skin contact : Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Cover the affected area with an emollient. Cold water may be used . Wash clothing and thoroughly clean shoes before reuse. Get medical attention immediately.

First-aid measures after eye contact : Remove contact lenses immediately. Flush eyes with plenty of water for at least 15 minutes.

Get medical attention immediately.

First-aid measures after ingestion : Do not induce vomiting. Give water to victim to drink. Seek medical attention.

4.2. Most important symptoms and effects, both acute and delayed

Symptoms/injuries after inhalation : May be fatal if inhaled. Material is extremely destructive to tissue of the mucous membranes and upper respiratory tract. Inhalation of hydrochloric acid fumes produces nose, throat, and laryngeal burning, coughing, sneezing, choking sensation, hoarseness, as well as headache and palpatations.

Symptoms/injuries after skin contact : Causes severe skin irritation and burns.

Symptoms/injuries after eye contact : Causes severe eye irritation/conjuntivits, burns, corneal necrosis.

Symptoms/injuries after ingestion : May be fatal if swallowed. Causes irritation and burning, ulceration, or perforation of the gastrointestinal tract, nausea, vomiting, and diarrhea.

4.3. Indication of any immediate medical attention and special treatment needed

SECTION 5: Firefighting measures

5.1. Extinguishing media

Suitable extinguishing media : Use extinguishing media for surrounding fire.

Unsuitable extinguishing media : None.

5.2. Special hazards arising from the substance or mixture

Fire hazard : Not flammable.

Explosion hazard : None known.

5.3. Advice for firefighters

Protection during firefighting : Firefighters should wear full protective gear.

SECTION 6: Accidental release measures

6.1. Personal precautions, protective equipment and emergency procedures

6.1.1. For non-emergency personnel

No additional information available

6.1.2. For emergency responders

6.2. Environmental precautions

Avoid release to the environment.

05/18/2015 EN (English US) 3/7

6.3. Methods and material for containment and cleaning up

For containment : Stop the flow of material, if this is without risk.

Methods for cleaning up : Confine spill and soak up with absorbent. Place in an approved container and dispose in accordance with local, state and federal regulations.

6.4. Reference to other sections

SECTION 7: Handling and storage

7.1. Precautions for safe handling

Precautions for safe handling : Do not breathe gas, fumes, vapors, or spray. Do not ingest. Avoid contact with skin and eyes.

Never add water to this product.

7.2. Conditions for safe storage, including any incompatibilities

Storage conditions : Keep container tightly closed and in a cool, well-ventilated area. Store in a metallic or coated fiberboard drum using a strong polyethylene inner package.

7.3. Specific end use(s)

SECTION 8: Exposure controls/personal protection

8.1. Control parameters

Hydrochloric acid (7647-01-0)

ACGIH ACGIH Ceiling (ppm) 2 ppm

OSHA OSHA PEL (Ceiling) (mg/m³) 7 mg/m³

OSHA OSHA PEL (Ceiling) (ppm) 5 ppm

Ammonium bifluoride (1341-49-7)

ACGIH Not applicable

OSHA Not applicable

Cellulose, 2-hydroxyethyl ether (9004-62-0)

ACGIH Not applicable

OSHA Not applicable

8.2. Exposure controls

Hand protection : Wear impervious gloves to minimize skin contact.

Eye protection : Splash goggles.

Skin and body protection : Wear suitable working clothes.

Respiratory protection : If airborne concentrations are above the applicable exposure limits, use NIOSH approved respiratory protection.

SECTION 9: Physical and chemical properties

9.1. Information on basic physical and chemical properties

Physical state : Liquid

Color : Colorless to light yellow.

Odor : Pungent, irritating

Odor threshold : No data available pH : 4.3

Melting point : <-20 °C

Freezing point : No data available

Boiling point : 97.2 °C

Flash point : No data available

Relative evaporation rate (butyl acetate=1) : No data available

Flammability (solid, gas) : No data available

Explosion limits : No data available

Explosive properties : No data available

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Oxidizing properties : No data available

Vapor pressure : No data available

Specific gravity : No data available

Relative vapor density at 20 °C : No data available

Solubility : Soluble

Log Pow : No data available

Log Kow : No data available

Auto-ignition temperature : No data available

Decomposition temperature : No data available

Viscosity : No data available

Viscosity, kinematic : No data available

Viscosity, dynamic : No data available

9.2. Other information

SECTION 10: Stability and reactivity

10.1. Reactivity

10.2. Chemical stability

The product is stable at normal handling and storage conditions.

10.3. Possibility of hazardous reactions

Will not occur.

10.4. Conditions to avoid

None

10.5. Incompatible materials

Metal, oxidizing agents, organic materials, alkalis, water.

10.6. Hazardous decomposition products

Not determined

SECTION 11: Toxicological information

11.1. Information on toxicological effects

Acute toxicity : Oral: Harmful if swallowed. Inhalation: Harmful if inhaled.

MasonRE G

ATE US (oral) 1625.000 mg/kg body weight

ATE US (gases) 4500.000 ppmV/4h

ATE US (vapors) 11.000 mg/l/4h

ATE US (dust, mist) 1.500 mg/l/4h

LD50 oral rat 238 - 277 mg/kg

LD50 dermal rabbit > 5010 mg/kg

LC50 inhalation rat (mg/l) 1.68 mg/l (Exposure time: 1 h)

ATE US (gases) 781.000 ppmV/4h

LD50 oral rat 130 mg/kg

ATE US (oral) 130.000 mg/kg body weight

Skin corrosion/irritation : Causes severe skin burns and eye damage.

pH: 4.3

Serious eye damage/irritation : Causes serious eye damage.

pH: 4.3

Respiratory or skin sensitization : Not classified

Germ cell mutagenicity : Not classified

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Carcinogenicity : Not classified

IARC group 3 - Not classifiable

Reproductive toxicity : Not classified

Specific target organ toxicity (single exposure) : Not classified

Specific target organ toxicity (repeated exposure)

: Not classified

Aspiration hazard : Not classified

SECTION 12: Ecological information

12.1. Toxicity

12.2. Persistence and degradability

12.3. Bioaccumulative potential

BCF fish 1 (completely dissociated in water)

12.4. Mobility in soil

12.5. Other adverse effects

Effect on the global warming : No known ecological damage caused by this product.

SECTION 13: Disposal considerations

13.1. Waste treatment methods

Waste disposal recommendations : Dispose of contents/container in accordance with local/regional/national/international regulations.

SECTION 14: Transport information

Department of Transportation (DOT)

In accordance with DOT

Transport document description : UN1789 Hydrochloric acid, 8, II

UN-No.(DOT) : UN1789

DOT Proper Shipping Name : Hydrochloric acid

Department of Transportation (DOT) Hazard Classes

: 8 - Class 8 - Corrosive material 49 CFR 173.136

Hazard labels (DOT) : 8 - Corrosive

Packing group (DOT) : II - Medium Danger

DOT Packaging Non Bulk (49 CFR 173.xxx) : 202

DOT Packaging Bulk (49 CFR 173.xxx) : 242

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DOT Special Provisions (49 CFR 172.102) : A3 - For combination packaging, if glass inner packaging (including ampoules) are used, they must be packed with absorbent material in tightly closed metal receptacles before packing in outer packaging.

A6 - For combination packaging, if plastic inner packaging are used, they must be packed in tightly closed metal receptacles before packing in outer packaging.

B3 - MC 300, MC 301, MC 302, MC 303, MC 305, and MC 306 and DOT 406 cargo tanks and DOT 57 portable tanks are not authorized.

B15 - Packaging must be protected with non-metallic linings impervious to the lading or have a suitable corrosion allowance.

IB2 - Authorized IBCs: Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1). Additional Requirement: Only liquids with a vapor pressure less than or equal to 110 kPa at 50 C (1.1 bar at 122 F), or 130 kPa at 55 C (1.3 bar at 131 F) are authorized.

N41 - Metal construction materials are not authorized for any part of a packaging which is normally in contact with the hazardous material.

T8 - 4 178.274(d)(2) Normal............. Prohibited TP2 - a. The maximum degree of filling must not exceed the degree of filling determined by the following: (image) Where: tr is the maximum mean bulk temperature during transport, tf is the temperature in degrees celsius of the liquid during filling, and a is the mean coefficient of cubical expansion of the liquid between the mean temperature of the liquid during filling (tf) and the maximum mean bulk temperature during transportation (tr) both in degrees celsius. b. For liquids transported under ambient conditions may be calculated using the formula: (image) Where: d15 and d50 are the densities (in units of mass per unit volume) of the liquid at 15 C (59 F) and 50 C (122 F), respectively.

TP12 - This material is considered highly corrosive to steel.

DOT Packaging Exceptions (49 CFR 173.xxx) : 154

DOT Quantity Limitations Passenger aircraft/rail

(49 CFR 173.27)

: 1 L

DOT Quantity Limitations Cargo aircraft only (49

CFR 175.75)

: 30 L

DOT Vessel Stowage Location : C - The material must be stowed ‘‘on deck only’’ on a cargo vessel and on a passenger vessel.

SECTION 15: Regulatory information

15.1. US Federal regulations

Listed on the United States TSCA (Toxic Substances Control Act) inventory Listed on SARA Section 302 (Specific toxic chemical listings) Listed on SARA Section 313 (Specific toxic chemical listings)

SARA Section 302 Threshold Planning Quantity (TPQ)

500 (gas only)

SARA Section 313 - Emission Reporting 1.0 % (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)

Listed on the United States TSCA (Toxic Substances Control Act) inventory

Cellulose, 2-hydroxyethyl ether (9004-62-0)

Listed on the United States TSCA (Toxic Substances Control Act) inventory

15.2. US State regulations

U.S. - Massachusetts - Right To Know List U.S. - Minnesota - Hazardous Substance List U.S. - New Jersey - Right to Know Hazardous Substance List U.S. - Pennsylvania - RTK (Right to Know) List

U.S. - Massachusetts - Right To Know List U.S. - New Jersey - Right to Know Hazardous Substance List U.S. - Pennsylvania - RTK (Right to Know) List

05/18/2015 EN (English US) 7/7

SECTION 16: Other information

Full text of H-phrases::

------ Acute Tox. 3 (Inhalation:gas) Acute toxicity (inhalation:gas) Category 3

------ Acute Tox. 3 (Oral) Acute toxicity (oral) Category 3

------ Acute Tox. 4 (Inhalation) Acute toxicity (inhalation) Category 4

------ Acute Tox. 4 (Oral) Acute toxicity (oral) Category 4

------ Eye Dam. 1 Serious eye damage/eye irritation Category 1

------ Skin Corr. 1A Skin corrosion/irritation Category 1A

------ Skin Corr. 1B Skin corrosion/irritation Category 1B

------ H301 Toxic if swallowed

------ H302 Harmful if swallowed

------ H314 Causes severe skin burns and eye damage

------ H318 Causes serious eye damage

------ H331 Toxic if inhaled

------ H332 Harmful if inhaled

This information is based on our current knowledge and is intended to describe the product for the purposes of health, safety and environmental requirements only. It should not therefore be construed as guaranteeing any specific property of the product

Sure Klean® Iron Stain Remover is a specialized product developed for removal of copper and other metallic salt staining from natural stone and masonry surfaces. A non-acidic poultice additive, Iron Stain Remover is safe for use on polished marble and other acid sensitive stone or masonry surfaces.

Iron Stain Remover is a clear liquid designed to be mixed with PROSOCO’s Marble Poultice, an odorless non acidic blend of clays and biodegradable detergents in dry form. Properly prepared, the mixture produces a thick, creamy paste which is designed for trowel application to the stained surface.

REGULATORY COMPLIANCE

VOC Compliance Sure Klean® Iron Stain Remover is compliant with all national, state and district VOC regulations.

TYPICAL TECHNICAL DATA

FORM Clear, colorless liquid

Ammonia odor

SPECIFIC GRAVITY 1.049

pH 9.0 WT/GAL 8.75 lbs

ACTIVE CONTENT not applicable

TOTAL SOLIDS not applicable

VOC CONTENT not applicable

FLASH POINT not applicable

FREEZE POINT no data

SHELF LIFE 2 years in tightly sealed, unopened container

SAFETY INFORMATION

Always read full label and SDS for precautionary instructions before use. Use appropriate safety equipment and job-site controls during application and handling.

24-Hour Emergency Information:

INFOTRAC at 800-535-5053

CLEANING & PROTECTIVE TREATMENTS

Sure Klean®

Product Data Sheet • Page 1 of 3 • Item #20T12 – 082621 • ©2021 PROSOCO, Inc. • www.prosoco.com

Iron Stain Remover

PREPARATION

Protect foliage and painted surfaces by using polyethylene or other proven protective material.

Avoid contact with auto and pedestrians by protecting or diverting such traffic.

Surface and Air Temperatures Surface and air temperatures should be at least 50° F (10° C). Cold temperatures adversely affect the cleaning properties of Iron Stain Remover. Product should not be mixed or applied at temperatures below freezing. Wet poultice will freeze.

Equipment Apply the prepared poultice mix using a plasterer’s trowel or a wide, flexible taping knife.

Before the poultice dries, cover it with PROSOCO’s OverCoat protective paper, glossy side down, and tape down the edges. OverCoat is a semi-impermeable protective paper for keeping poultice cleaners and paint removers moist, increasing effectiveness. The paper also protects cleaner and passersby from incidental contact. Visit www.prosoco.com or call 800-255-4255 for more information.

Storage and Handling Transport and store in a cool, dry place with adequate ventilation. Always seal container after dispensing. Do not alter or mix with other chemicals. Published shelf life assumes upright storage of factory-sealed container in a dry place.

Maintain temperatures of 45–100° F (7–38° C). Do not double stack pallets. Dispose of unused product and container in accordance with local, state and federal regulations.

APPLICATION

Read “Preparation” and the Safety Data Sheet before use.

ALWAYS TEST a small area of each surface to confirm suitability and desired results before beginning overall application. Test each type of masonry and each type of stain. Test with the same equipment, recommended surface preparation and application procedures planned for general application. Let test area dry 3–7 days before inspection and approval.

Make the test panel available for comparison throughout the cleaning project.

Test at air and surface temperatures similar to those expected for overall cleaning. Temperature affects product performance.

Mixing Iron Stain Remover should be mixed with PROSOCO’s Marble Poultice to produce a thick creamy paste. Approximately 1 quart of Iron Stain Remover is required for each pound of dry Marble Poultice powder.

Mixing Procedures

1. Pour or shovel the dry Marble Poultice into a suitable mixing container.

2. While mixing, add sufficient Iron Stain

Remover to produce a wet paste of a trowelable consistency.

Typical Coverage Rates The prepared poultice mixture (1 quart of liquid/1 pound dry poultice powder) provides a coverage rate of approximately 4 square feet (0.37 square meters).

Application Instructions

1. Apply the prepared poultice mix to a uniform thickness of approximately 1/4 inch.

2. Cover the poultice with PROSOCO’s OverCoat, glossy side down. Press the OverCoat protective paper against poultice. It will cling to the surface. Rub gently to remove air pockets and ensure smooth, overall adhesion. Tape/seal off edges of the film.

3. Allow the poultice to remain on the surface for 12–24 hours.

4. Remove OverCoat. Allow the poultice to dry completely, 2–4 hours. The poultice surface develops cracks as it contracts and dries. A fully developed network of cracks indicates the poultice is completely dry. Dry times may vary with environmental conditions such as temperature, wind and humidity.

5. After the poultice is completely dry, carefully scrape the poultice from the surface.

6. Using a stiff-fibered scrubbing brush and fresh water, wash the surface thoroughly removing all traces of the poultice paste.

7. Repeat poultice procedures where necessary.

Cleanup Clean tools and equipment using fresh water.

Product Data Sheet Sure Klean® Iron Stain Remover

Product Data Sheet • Page 2 of 3 • Item #20T12 – 082621 • ©2021 PROSOCO, Inc. • www.prosoco.com

WARRANTY

The information and recommendations made are based on our own research and the research of others, and are believed to be accurate. However, no guarantee of their accuracy is made because we cannot cover every possible application of our products, nor anticipate every variation encountered in masonry surfaces, job conditions and methods used. The purchasers shall make their own tests to determine the suitability of such products for a particular purpose.

PROSOCO, Inc. warrants this product to be free from defects. Where permitted by law, PROSOCO makes no other warranties with respect to this product, express or implied, including without limitation the implied warranties of merchantability or fitness for particular purpose.

The purchaser shall be responsible to make his own tests to determine the suitability of this product for his particular purpose. PROSOCO’s liability shall be limited in all events to supplying sufficient product to re-treat the specific areas to which defective product has been applied. Acceptance and use of this product absolves PROSOCO from any other liability, from whatever source, including liability for incidental, consequential or resultant damages whether due to breach of warranty, negligence or strict liability. This warranty may not be modified or extended by representatives of PROSOCO, its distributors or dealers.

CUSTOMER CARE

Factory personnel are available for product, environment and job-safety assistance with no obligation. Call 800-255-4255 and ask for Customer Care – technical support.

Factory-trained representatives are established in principal cities throughout the continental United States. Call Customer Care at 800-255-4255, or visit our website at www.prosoco.com, for the name of the PROSOCO representative in your area.

Product Data Sheet Sure Klean® Iron Stain Remover

Product Data Sheet • Page 3 of 3 • Item #20T12 – 082621 • ©2021 PROSOCO, Inc. • www.prosoco.com

SAFETY DATA SHEET

Issuing Date 26-Jan-2015 Revision date 27-Apr-2022 Revision Number 1.03

1. IDENTIFICATION OF THE SUBSTANCE/PREPARATION AND OF THE COMPANY/UNDERTAKING

Product identifier Product Name Sure Klean® Iron Stain Remover

Other means of identification Product Code(s) 20T12

Recommended use of the chemical and restrictions on use Recommended use Restricted to professional users.

Uses advised against No information available

Details of the supplier of the safety data sheet

Emergency telephone number 8:00 AM – 5:00 PM CST Monday-Friday 785-865-4200

NON-BUSINESS HOURS (INFOTRAC) 800-535-5053

2. HAZARDS IDENTIFICATION

Classification

Serious eye damage/eye irritation Category 2A

Label elements

Emergency Overview

Precautionary Statements - Prevention Wash face, hands and any exposed skin thoroughly after handling Wear eye/face protection

Precautionary Statements - Response

IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing

Manufacturer Address PROSOCO, Inc.

3741 Greenway Circle Lawrence, Kansas 66046

Warning

Hazard statements Causes serious eye irritation

Appearance clear Physical state Liquid

Page 1 / 7

Odor Ammonia

20T12 Sure Klean® Iron Stain Remover Revision date 27-Apr-2022

If eye irritation persists: Get medical advice/attention

Hazards not otherwise classified (HNOC) Other information

3. COMPOSITION/INFORMATION ON INGREDIENTS

Chemical name CAS No. Weight-% Trade Secret Water 7732-18-5 60 - 100 *

Ammonium salt Proprietary 7 - 13 *

* The exact percentage (concentration) of composition has been withheld as a trade secret.

4. FIRST AID MEASURES

Description of first aid measures

General advice If symptoms persist, call a physician.

Eye contact Rinse thoroughly with plenty of water for at least 15 minutes, lifting lower and upper eyelids.

Consult a physician.

Skin Contact Wash off immediately with plenty of water. If skin irritation persists, call a physician.

Inhalation Remove to fresh air. If symptoms persist, call a physician.

Ingestion Do NOT induce vomiting. Rinse mouth. Drink plenty of water. Never give anything by mouth to an unconscious person. If symptoms persist, call a physician.

Most important symptoms and effects, both acute and delayed

Symptoms Causes serious eye irritation.

Indication of any immediate medical attention and special treatment needed

Note to physicians Treat symptomatically.

5. FIRE-FIGHTING MEASURES

Suitable Extinguishing Media Use extinguishing measures that are appropriate to local circumstances and the surrounding environment.

Unsuitable Extinguishing Media Caution: Use of water spray when fighting fire may be inefficient.

Specific hazards arising from the chemical No information available.

Protective equipment and precautions for firefighters As in any fire, wear self-contained breathing apparatus pressure-demand, MSHA/NIOSH (approved or equivalent) and full protective gear.

6. ACCIDENTAL RELEASE MEASURES

Personal precautions, protective equipment and emergency procedures

Personal precautions Avoid contact with skin, eyes or clothing. Use personal protective equipment as required.

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Environmental precautions

Environmental precautions See Section 12 for additional ecological information. Do not flush into surface water or sanitary sewer system. Prevent product from entering drains.

Methods and material for containment and cleaning up

Methods for containment Prevent further leakage or spillage if safe to do so. Dike far ahead of liquid spill for later disposal.

Methods for cleaning up Dam up. Soak up with inert absorbent material. Pick up and transfer to properly labeled containers.

7. HANDLING AND STORAGE

Precautions for safe handling

Advice on safe handling Handle in accordance with good industrial hygiene and safety practice.

Conditions for safe storage, including any incompatibilities

Storage Conditions Keep container tightly closed in a dry and well-ventilated place. Keep out of the reach of children. Keep in properly labeled containers.

Incompatible materials Acids.

8. EXPOSURE CONTROLS/PERSONAL PROTECTION

Control parameters

Exposure Guidelines This product, as supplied, does not contain any hazardous materials with occupational exposure limits established by the region specific regulatory bodies.

Appropriate engineering…