00011622 Addendum2.pdf

ITB_ADDENDUM, S006-G031521

DATE: 10/10/2024 OREGON DEPARTMENT OF TRANSPORTATION

INVITATION TO BID

ADDENDUM NO. 2

ITB NO.: S-73000-00011622 CLOSING DATE: 10/08/2024 TIME: 10:00 AM

DESCRIPTION: ODOT Salem Building K & M Roof Clean and Coating

BUYER: David Dethloff EMAIL: William.d.dethloff@odot.oregon.gov PHONE: 503-569-8793

Requests for clarification, requests for change, and protests of this Addendum are due no later than:

10/11/2024 @ 5:00 PM.

This Addendum modifies the Invitation To Bid (ITB) document(s) only to the extent indicated herein. All other areas not changed or otherwise modified by this Addendum remain in full force and effect. This Addendum is hereby made an integral part of the ITB document. Bidder must be responsive to any requirements of this Addendum as if the requirements were set forth in the ITB. Acknowledge receipt of this Addendum by indicating its number in the spaces provided ITB Section H – Addenda Acknowledgement. Failure to do so may result in Bid rejection. See the ITB regarding pre-opening modifications of Bids, where to send Bid modifications, requests for clarification or change and protests of this Addendum, and the deadlines for the foregoing.

THE PURPOSE OF THIS ADDENDUM IS TO:

Provide information on 2 approved equal brands which were submitted for review meeting the solicitation deadline for requests for approval. Both submitted brands have been APPROVED for this project as Approved Equal Brands for use for this Project.

• Uniflex™Silicone44™ Rubberized Silicone White Roof Coating

• GAF Unisil High Solids Silicone Roof Coating mailto:William.d.dethloff@odot.oregon.gov

KST044300-20 5-gallon pail

Color White Vehicle Base 100% Silicone Weight per Gallon 11..05 +/- .5 lbs Solid by Weight 98% +/- Solid by Volume 98% +/- Viscosity (ASTM D 562) 7,098 cps Dry Film Thickness (@ 5 Gallons 250 sq./ft.) 30 mils

Dry Time Rain Safe 60 minutes Exposure 4-6 hours Between coats 6 hours minimum Full cure @ 70°F, 50% relative humidity 72 hours

Drying Time is temperature, humidity and film thickness dependent VOC < 10 g/L pH @ 77°F 8.0 Flash Point >290°F Clean Up Virgin Mineral Spirits or Naptha

SKU

SIZE

KST044300-27 55-gallon drum

Elongation 425% Tensile Strength 275 psi Tear Resistance (ASTM D 624) 37 lbs/linear feet

Permeance (ASTM E 96 Procedure BW) 4 US perms Solar Reflectance Index 110

Reflectivity 0.90

Thermal Emissivity 0.90

Uniflex® Silicone44™ Rubberized Silicone White Roof Coating is a premium silicone rubber roof coating ideal for ponding water.

Metal, single ply, smooth BUR, APP, SBS, modified bitumen, polyurethane foam, cured concrete, existing asphaltic and elastomeric roof coatings and other approved surfaces.

NOT for use on roof shingles.

Substrates should be aged a minimum of 6 months prior to applying coatings.

An adhesion peel test must be performed to ensure proper adhesion prior to application.

EPDM may require use of Bond-it rinse primer.

All corrosion should be primed with Uniflex Rust Inhibitive primer.

Asphaltic substrates may require Uniflex Bleed Block Primer

PRODUCT DESCRIPTION

RUBBERIZED SILICONE ROOF COATING

44-300 WHITE

GENERAL USES

PACKAGING INFORMATION

PRODUCT CHARACTERISTICS

PERFORMANCE CHARACTERISTICS

SURFACE PREPARATION

All surfaces should be clean and dry. Application to a wet or damp surface will compromise adhesion. Treat rust with proper primer.

If mildew is present, surfaces should be cleaned with a proper bleach solution (one part bleach to 2 parts water). It is necessary to pressure wash all surfaces (using a wide spray tip, minimum 2000 p si) before applying this roof coating. A pull test sample should be done on all roofs to verify proper long term adhesion. Asphalt-bleed blocking primer is recommended over asphalt substrates to limit staining and discoloration. Repair cracks and damaged areas with Uniflex SILICONE44 Rubberized Silicone Roof and Flashing Sealant.

Allow all sealants and primers to fully cure per manufacturer directions prior to top coating.

PRECAUTIONS: For exterior use only. Protect building inlets from product vapors or fumes. DO NOT allow product to freeze.

Protective clothing, gloves and eye-wear should be used during application of these products. When transporting this product, ensure that lid is tight and pail secure and upright. DO NOT allow pail to tumble as this may cause lid to loosen and leakage to occur. Do not transport on passenger seats or inside the passenger compartment of any vehicle. Store product in the cargo area of vehicle, and secure over protective clothes to prevent damage due to accidental spills. For longest life, store in controlled environment, 45°F- 80°F. Avoid continual storage in direct sunlight or at temperatures above 99°F. Seal container when not in use. Do not walk on coating until fully cured. The contents of this container are reactive with moisture in the air. Curing starts immediately upon opening and opened product cannot be returned. Use all contents within one day of opening. DO NOT reuse empty containers.

Ponding water creates excessive weight on roofs and may compromise structural integrity leading to a potential collapse hazard. Always follow the National Roofing Contractors Association guidelines to remove ponding water from roof surfaces. SLIP WARNING: Use extreme caution when walking or working on silicone coated surfaces, and apply traction promoting particles in coating if needed for walkway areas.

If there will be foot traffic on roof after installation (and cured), embed 40 - 60 lbs. of #11 ceramic granules per 100 sq ft into top layer of coating to create a non-skid finish. Surfaces without granules are slippery when damp or wet. Use OSHA approved fall protection when on roof surfaces

NOTE: Material may experience separation while in storage with clear material surfacing to the top. Recommend a thorough manual stir and mix of the product prior to application. Power agitation may entrain air into the product if not performed at a slow speed. DO NOT machine shake. Pour product onto roof surface and spread using a roof brush or notched squeegee to achieve a dry film thickness of 30 mils. Backroll with a 3/4” nap roller to fill voids and create a uniform finish. Avoid excessive rolling. If using an airless sprayer, a hydraulic pump with 5,000 - 7,000 psi and a .531” tip is required. If using airless sprayer, clean sprayer using virgin mineral spirits. Coating application options: If one coat application is desired, apply 1 coat at 50 sq/ft per gallon. If applying in 2 coats, apply each coat in 1 gallon per 100 sq/ft. Finished coverage will be the same, at covering 250 sq/ft of roof surface per 5 gallon bucket. DO NOT apply if heavy dew or rain is expected within 2 to 4 hours. Refer to UNIFLEX Fluid Applied Roofing Systems Specifications as application rate and technique may vary with substrate type.

Ideal application is when surface and air temperatures are between 45°F and 99°F. Do not apply to roofs when air temperatures exceed 120°F. Surface must be completely dry including dew before applying. Apply on a clear, dry day with a max humidity level of 70%. DO NOT apply if heavy dew or rain is expected within 2 to 4 hours. KEEP FROM FREEZING.

FOR EXTERIOR USE ONLY. DO NOT THIN.

The information and recommendations set forth in this Product Data Sheet are based upon tests conducted by or on behalf of KST Coatings- A Business Unit of the Sherwin-Williams Company. Such information and recommendations set forth herein are subject to change and pertain to the product offered at the time of the publication. Consult your Uniflex Technical Representative to obtain the most recent Product Data Information.

If further information is needed, contact Uniflex Technical Service at 1-888-321-3539

Revised 03.2024

DISCLAIMER

Uniflex and The Sherwin-Williams Company warrants Silicone44™ Rubberized Silicone Roof Coating to be free from defects in materials and manufacturing. Under this warranty, we will provide, at no charge, a quantity of Silicone44™ Rubberized Silicone Roof Coating sufficient to replace any Silicone44™ Rubberized Silicone Roof Coating proven to be defective when applied according to our written instructions and in applications recommended by us as suitable for the product. THIS LIMITED WARRANTY IS THE BUYER’S SOLE AND EXCLUSIVE REMEDY AGAINST UNIFLEX AND THE SHERWIN-WILLIAMS COMPANY REGARDING THE PRODUCT. IN NO EVENT SHALL UNIFLEX OR THE SHERWIN-WILLIAMS COMPANY BE LIABLE FOR ANY CONSEQUENTIAL, SPECIAL, INCIDENTAL, INDIRECT, PUNITIVE OR

OTHER DAMAGES ARISING FROM THE USE OR PERFORMANCE OF THE PRODUCT.

Since methods of application and on site conditions can affect performance, UNIFLEX AND THE SHERWIN-WILLIAMS COMPANY MAKE NO OTHER WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE REGARDING THE PRODUCT, AND UNIFLEX AND THE SHERWIN-WILLIAMS COMPANY HEREBY DISCLAIM ALL

SUCH OTHER WARRANTIES.

APPLICATION

APPLICATION CONDITIONS

RUBBERIZED SILICONE ROOF COATING

44-300 WHITE

WARRANTY

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Why tear off your roof? Restore it.

Tearing off a roof can be expensive and inconvenient. Before you commit to a full reroof, consider adding up to 20 years of useful life to your structurally sound roof, along with excellent protection against leaks due to ponding water, by restoring your roof with GAF High Solids Silicone Coating — a moisture-cure coating that protects against the damaging effects of weather elements and UV rays.

Save time, hassle, and money. Give your building a seamless, recoatable roof surface that will last for years to come.

GAF High Solids Silicone:

Stand up to ponding water.

Approvals:

Convenience and Durability:

n �Meets ASTM D6694 n CRRC Rated (white only) n �Classified by UL in accordance with

ANSI/UL 790*

n �Miami-Dade County Product Control Approved n �FM Approved†

* �Refer to UL Product iQ for actual assembles.

† �Refer to FM RoofNav for actual assemblies.

‡ �Energy cost savings are not guaranteed and the amount of savings may vary based on climate zone, utility rates, radiative properties of roofing products, insulation levels, HVAC equipment efficiency, and other factors.

§ �For qualified systems only. Additional requirements apply. Contact GAF for more information.

n �Low-VOC GAF High Solids Silicone can be installed with little interruption to business, at temperatures as low as 35°F n �Stands up to ponding water — the nemesis of many other roofing surfaces n �Easy-to-apply by spray, roller, or brush n �Available in highly reflective white‡ n �Silicone elastomers maintain properties in extreme temperatures n �Creates seamless protection over most common roofing substrates including metal, TPO, PVC, Hypalon®, EPDM, smooth and granulated asphaltic, structural concrete, SPF, and previously coated roofs n �High build application, with 97% average solids by volume, can be applied in a single coat with no pinholes or mud-cracking n �NDL guarantees up to 20 years are available§

Two coats of GAF High Solids Silicone Roof Coating System over a base coat of GAF Multi-Purpose Primer preserved the integrity of the acoustic Orland Sports Park roof.

Orland Sports Park Project Profile

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High Solids Silicone Roof Coating - Data Sheet

PRODUCT DESCRIPTION

GAF High Solids Silicone Roof Coating is a high-solids, moisture-cure silicone coating that provides protection against weather elements, UV rays, and leaks due to ponding water for a variety of substrates.

APPROVED SUBSTRATES

Metal, TPO, PVC, Hypalon®, EPDM, smooth and granulated asphaltic, structural concrete, and SPF.

PACKAGING SIZES

5 gallon (18.9 liter) pail 55 gallon (200 liter) drum

STORAGE & SHELF LIFE

PRODUCT STORAGE TEMPERATURE:

40°F – 90°F (5°C – 32°C) Do NOT allow coating to freeze.

SHELF LIFE: 24 months from date of manufacture in unopened containers, if stored properly in a clean and well-ventilated area.

WARRANTY

Refer to applicable warranties and guarantees, available at gaf.com, for complete coverage and restrictions.

For application questions, contact GAF Design Services at 1-877-GAF-ROOF

APPLICATION

INSTRUCTIONS

SUBSTRATE PREPARATION: Roof should have positive drainage, and be clean and dry with no trapped moisture. Repair damaged membrane, flashings, and penetrations. Conduct test patches to verify adhesion of coating prior to start of work. Priming of substrate is recommended and may be required. See Liquid-Applied Roofing Manual at gaf.com.

MIXING: Mix uniformly for 3 minutes prior to use. Do NOT attempt to thin or self-tint.

APPLICATION: Apply by brush, roller, or airless sprayer evenly at the rates specified below. GAF High Solids Silicone can be applied in one pass up to 2.75 gallons per 100 ft² (11.2 L per 10 m2) as long as the substrate and slope conditions allow (no slumping), and the required DFT (mils) are met. Apply additional coats perpendicular to the previous coat once it is dry enough to walk on. Total coverage is dependent on the substrate.

LIMITATIONS &

PRECAUTIONS

APPLICATION AIR TEMPERATURE: Min.

50°F (10°C). Do NOT heat containers.

APPLICATION SURFACE

TEMPERATURE: 50°F (10°C) and rising. Care should be taken when coating surfaces above 120°F.

Contact GAF Design Services if you have application questions.

Do NOT apply if rain, dew, fog, heavy moisture, condensation, or freezing temperatures are in the 8-hour forecast to ensure proper cure. Cool temperatures/high humidity may slow curing.

SAFETY & HANDLING

For specific information regarding safe handling of this material, please refer to the Safety Data Sheet (SDS).

CLEAN UP

Use VM&P naphtha or virgin mineral spirits to thoroughly flush equipment. Leave solvent in the lines and equipment until next use.

Do not leave product in the pump or hoses.

APPLICATION RATE FOR LIMITED WARRANTY ON GAF

LIQUID-APPLIED ROOF COATINGS

Limited Warranty Term 10 year 15 year 20 year

Number of Gallons Per Square 1.5 2.0 2.5

Dry Film Thickness, Mils 23 30 38

For application rates and other requirements for system guarantees and warranties, see Liquid-Applied Roofing Manual at gaf.com.

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APPROVALS

ANSI/UL 790 Class A UL Listed*

CRRC

(Cool Roof Rating Council) coolroofs.org

Solar Reflectance (Smooth, White Only)

0.88 initial,

0.69 aged**

Solar Reflectance (Rough, White Only)

0.81 initial,

0.64 aged**

Thermal Emittance (Smooth, White Only)

0.90 initial,

0.90 aged**

Thermal Emittance (Rough, White Only)

0.91 initial,

0.90 aged**

ASTM Meets or Exceeds ASTM D6694

Title 24 Can be used to comply with the 2019, Title 24, Part 6, Cool Roof Requirements of the California Code of Regulations.

*Refer to UL Product iQ for actual assembles **CRRC Rapid Ratings: Intertim laboratory aged values that simulate naturally-aged value and will be replaced by the measured three-year aged values upon completion of the weathering process.

PHYSICAL PROPERTIES (ASTM D6694 / D6694M-21)

Table 1 : Liquid Physical Property Requirements

Type ASTM Test Method ASTM Minimum Values Test Values1

Volume Solids ASTM D 2697 57% min. 96.60%

Weight Solids ASTM D 1644 As listed by manufacturer 96.57%

Table 2 : Film Physical Property Requirements Type ASTM Test Method ASTM Minimum Values Test Values1

Initial Percent Elongation ASTM D 2370 Min. 100% 261%

Initial Tensile Strength ASTM D 2370 Min. 150 psi 299 psi

Permeance ASTM E 96/E 96M Min. 2.5 perms 6.19 perms

Accelerated Weathering (5,000 h) ASTM D 4798 No cracking/checking Pass

Adhesion to SPF ASTM D 903 Min. 2.0 pli wet Pass

Tear Resistance ASTM D 624 Min. 20 lbf/in 30 lbf/in

Low Temperature Flexibility ASTM D 522 Min. Pass 0.5” mandrel -15°F Pass

Table 3: Additional Physical Properties Type ASTM Test Method Test Values1

VOC ASTM D3960 < 50.0 g/L

Solar Reflective Index (SRI) ASTM C1549 Smooth, White Only

111 initial, 84 aged**

Rough, White Only 101 initial, 78 aged**

Standard Colors - White, Light Gray, Dark Gray, Tan

1. Values are approximate and subject to normal manufacturing variations. These values are not guaranteed and are provided solely as a guide.

High Solids Silicone Roof Coating - Data Sheet

We protect what matters most™

Visit gaf.com ©

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High-build Silicone Sealant

Silicone Mastic

Description:

GAF Silicone Mastic is a thick, high-build silicone sealant.

Features and Benefits:

n ��� Provides protection against leaks due to ponding water n � Versatile application is great for repair and maintenance n � 97% average solids by volume content allows for more coating applied in a single pass

1 �Refer to the UNITED COATINGS™ LIQUID-APPLIED ROOFING Application & Specifications Manual, available at gaf.com, for acceptable substrates n � Read complete application instructions at gaf.com before using this product n � May be applied by brush or trowel n � Apply evenly at the rate of 1.25 gal per square per coat. If 3-coursing apply additional coats as soon as the previous coat is dry enough to walk on.

Additional coats may be applied as soon as the previous layer is dry enough to walk on and should be applied perpendicular to the previous layer to ensure proper coverage.

n � Total coverage is dependent on the substrate. Rough or porous substrates may require more mastic.

Safety and Handling:

n � For specific information on safe handling of this material, refer to the Safety Data Sheet (SDS) n ��� Substrate should be dry, clean, and free from oil, grease, and other contaminants n ��� Pressure-wash to remove all dust and debris, and allow to dry n ��� Examine substrate to receive new mastic material and conduct test patches to verify adhesion of mastic prior to start of work n ��� Check for any damaged roof membranes, including all flashings and penetrations, and repair before mastic application commences n ��� Priming of substrate may be required1

General Application Method:

Substrate Preparation:

Mixing:

n � Some settling of material may have occurred during shipment and storage n � Containers that have been stored for any length of time may develop a skin/film on top of the coating; this should be removed prior to mixing n � Take care not to incorporate air into the product n � Use VM&P naphtha or mineral spirits to thoroughly clean equipment. If mastic has hardened, clean with mineral spirits.

n � Mix prior to use with a 3/4-horsepower or greater mixer with a blade capable of uniformly mixing the entire container n � Use immediately to avoid trace amounts of moisture from causing a reaction in the container

Cleanup:

IMPORTANT: Repair leaks promptly to avoid adverse effects, including mold growth.

DO NOT:

n � Apply on wet substrates n � Heat container n � Attempt to thin product n � Apply if rain, dew, fog, heavy moisture condensation, or freezing temperatures are in the 8-hour forecast

Precautions:

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Physical Properties:

Product Details:

Packaging 3.5-gallon (13.2 liter) pail

Colors White, Light Gray, Black

Shelf Life 12 months from date of manufacture in unopened containers, if stored properly in a clean and well-ventilated area at 40°F – 90°F (5°C – 32°C). Storage outside temperature range will shorten shelf life.

Keep containers covered when not in use. Do not allow coating to freeze.

Dry Time to Walk On (Approx.) 5 Hours at 70°F (21°C) 50% R.H

Application Temperature (Air) 40°F (5°C) and rising

Application Temperature (Surface) 40°F – 110°F (5°C – 43°C)

GAF Silicone Mastic Property Test Method Approximate Values2

Solids by Weight ASTM D1644 98%

Solids by Volume ASTM D2697 97%

Tensile Strength ASTM D2370 200 psi

Elongation ASTM D2370 500%

VOC D3960 <50 g/L

2 Values stated are approximate and subject to normal manufacturing variation. These values are not guaranteed and are provided solely as a guide.

For application questions contact GAF Technical Support at 1-877-GAF-ROOF

Mastic Silicone

UNISIL HS QUICK SPEC

AGED PVC (UH-2)

Required:

❍ Moisture survey required ❍ Remove and replace any wet areas ❍ Repair membrane with like materials ❍ Roof must be clean, dry and tight ❍ Apply at 40°F (4°C) and rising with no rain, dew, fog or freezing temperatures in forecast for 8 hours ❍ Adhesion test required ❍ Power washing required

Recommendations:

• Refer to Technical Data Sheet for product specific application and surface temperature restrictions.

Installation Overview:

1. Before coating is applied, an adhesion test is required to ensure an adhesion minimum of 2.0 pounds per linear inch (PLI). Test patches should be applied with rates listed below2.

2. Power-wash substrate to remove contaminants that could negatively affect adhesion. Allow roof to completely dry.

3. Prime per chart below.

4. Treat all roof penetrations, drains, curbs, and scuppers. (Refer to Substrate Preparation section for requirements)

5. All loose seams must be 3-coursed. All other seams must be treated with flashing grade only, no fabric required. (Refer to Seam Treatment Guide for requirements)

6. Apply coating per the chart below:

METHOD REQUIREMENTS

CLEAN / PRIME

Product Rate

(Gal/Sq)

Cleaner Cleaning Concentrate (diluted) 0.5 - 0.7

Primer Multi-Purpose Primer 0.33

Aged PVC

Coverage Term Total Warranties/Guarantees Available

Gal/Sq‡ DFT* Emerald Pledge™ Diamond Pledge™

10 Year 1.50 23 Yes Yes

15 Year 2.00 31 Yes Yes

20 Year 2.50 39 Yes Yes

SEAMS & DETAILS

Treatment Type Product Total

(Gal/Sq) Total (linear ft/ gal)+

DFT*

(mils)

3-Coursed Rates Silicone Mastic and Fabric 2.50 75 45

Flashing Grade Only Rates Silicone Mastic 4.00 50 60 Note: For other product options, please refer to our Seam Treatment Guide.

+Flashing rates are based on a 6” (152 mm) width.

* Dry Film Thickness (DFT) is rounded to nearest mil, and is theoretical. Actual DFT will vary dependent on substrate profile, application technique and waste factor.

Note: DFT for 3-coursed rates includes 6 mils for the fabric.

2 when 2 PLI is not met, contact GAF Design Services.

‡ Coating may be applied in a single pass, as long as the substrate and slope conditions allow (no slumping), and the required DFT (mils) are met.

NOTE: The following “Quick Spec” is an abbreviated specification and is not meant to replace the detailed specification.

Complete 3-part CSI System Specifications are available at www.gaf.com.