Appendix K - Firestopping & Joint Sealants Specifications.pdf

TMP Architecture, Inc. TMP25026D

03-09-2026 D.R.1 CONSTRUCTION DOCUMENTS FIRESTOPPING

07 8400-1

SECTION 07 8400 - FIRESTOPPING

PART 1 GENERAL

1.01SECTION INCLUDES

A. Firestopping systems.

1. Firestopping of joints and penetraftions in fire resistance rated and smoke resistant assemblies, whether indicated on drawings or not, and other openings indicated.

1.02 REFERENCE STANDARDS

A. ASTM E814 - Standard Test Method for Fire Tests of Penetration Firestop Systems; 2024.

B. ASTM E1966 - Standard Test Method for Fire-Resistive Joint Systems; 2024.

C. ASTM E2174 - Standard Practice for On-Site Inspection of Installed Firestop Systems; 2024.

D. ASTM E2393 - Standard Practice for On-Site Inspection of Installed Fire Resistive Joint

Systems and Perimeter Fire Barriers; 2024.

E. ASTM E2307 - Standard Test Method for Determining Fire Resistance of Perimeter Fire

Barriers Using Intermediate-Scale, Multi-Story Test Apparatus; 2025b.

F. ASTM E2837 - Standard Test Method for Determining the Fire Resistance of Continuity Head-of-Wall Joint Systems Installed between Rated Wall Assemblies and Nonrated Horizontal

Assemblies; 2023a, with Editorial Revision (2024).

G. UL 2079 - Standard for Tests for Fire Resistance of Building Joint Systems; Current Edition, Including All Revisions.

1.03 SUBMITTALS

A. See Section 01 3000 - Administrative Requirements for submittal procedures.

B. Schedule of Firestopping: List each type of penetration, each type of joint, fire rating of the penetrated assembly, firestopping test or design number, and illustration of each firestopping system.

C. Product Data: Provide data on product characteristics, performance ratings, and limitations.

D. Installer's qualification statement.

1.04 QUALITY ASSURANCE

A. Fire Testing: Provide firestopping assemblies of designs that provide the scheduled fire ratings when tested in accordance with methods indicated.

1. Listing in UL (FRD) will be considered as constituting an acceptable test report.

B. Manufacturer Qualifications: Company specializing in manufacturing the products specified in this section with minimum 5 years documented experience.

C. Installer Qualifications: Company specializing in performing the work of this section and:

1. Verification of minimum 5 years documented experience installing work of this type.

1.05 MOCK-UPS

A. Install one firestopping assembly representative of each fire rating design required on project.

1. Where one design may be used for different penetrating items or in different wall or floor constructions, install one assembly for each different combination.

2. Where firestopping is intended to fill a linear opening, install at least 1 linear foot of firestopping.

B. If accepted, mock-up will represent minimum standard for this work.

C. If accepted, mock-up may remain as part of this work. Remove and replace mock-ups not accepted.

1.06 FIELD CONDITIONS

A. Comply with firestopping manufacturer's recommendations for temperature and conditions during and after installation; maintain minimum temperature before, during, and for three days after installation of materials.

B. Provide ventilation in areas where solvent-cured materials are being installed.

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PART 2 PRODUCTS

2.01 MANUFACTURERS

A. Firestopping Manufacturers:

1. 3M Fire Protection Systems; www.3m.com.

2. A/D Fire Protection Systems; www.adfire.com.

3. Hilti Firestop; www.hilti.com.

4. RectorSeal Firestop; www.rectorseal.com.

5. Specified Technologies, Inc. (STI); www.stifirestop.com.

6. Tremco Fire Protection Systems; www.tremcofirestop.com.

7. Substitutions: See Section 01 6000 - Product Requirements.

2.02 MATERIALS

A. Firestopping Materials: Any materials complying with firestopping assembly design requirements including, but not limited to, the following:

1. Cast-in-Place Firestop Devices: Factory-assembled devices for use in cast-in-place concrete floors and consisting of an outer sleeve lined with an intumescent strip, a flange attached to one end of the sleeve for fastening to concrete formwork, and a neoprene gasket.

2. Latex Sealants: Single-component latex formulations that do not re-emulsify after cure during exposure to moisture.

3. Firestop Devices: Factory-assembled collars formed from galvanized steel and lined with intumescent material sized to fit specific diameter of penetrant.

4. Intumescent Composite Sheets: Rigid panels consisting of aluminum-foil-faced intumescent elastomeric sheet bonded to galvanized-steel sheet.

5. Intumescent Putties: Nonhardening, water-resistant, intumescent putties containing no solvents or inorganic fibers.

6. Intumescent Wrap Strips: Single-component intumescent elastomeric sheets with aluminum foil on one side.

7. Mortars: Prepackaged dry mixes consisting of a blend of inorganic binders, hydraulic cement, fillers and lightweight aggregate formulated for mixing with water at Project site to form a nonshrinking, homogeneous mortar.

8. Pillows/Bags: Reusable heat-expanding pillows/bags consisting of glass-fiber cloth cases filled with a combination of mineral-fiber, water-insoluble expansion agents, and fire-retardant additives. Where exposed, cover openings with steel-reinforcing wire mesh to protect pillows/bags from being easily removed.

9. Silicone Foams: Multicomponent, silicone-based liquid elastomers that, when mixed, expand and cure in place to produce a flexible, nonshrinking foam.

10. Silicone Sealants: Single-component, silicone-based, neutral-curing elastomeric sealants B. Accessory Materials: For each firestopping assembly, provide all primers, forming/damming/backing materials, collars, sleeves, and related materials for a complete installation.

2.03 FIRESTOPPING ASSEMBLY REQUIREMENTS

A. General:

1. Provide firestopping assemblies indicated, or, if not indicated, as required to comply with fire ratings indicated.

2. Fire Ratings: As indicated on Drawings.

3. Joint Firestopping:

a. Nominal Widths: As indicated on Drawings.

b. Movement Capabilities: Class 1, 50 percent compression or extension, unless otherwise indicated or required.

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B. Penetration Firestopping Systems: Systems that resist spread of fire, passage of smoke and other gases, and maintain original fire-resistance rating of construction penetrated. Penetration firestopping systems shall be compatible with one another, with the substrates forming openings, and with penetrating items if any.

1. Through Penetration Firestopping: Use system that has been tested according to ASTM E814 to have fire resistance F Rating equal to required fire rating of penetrated assembly.

a. Temperature Rise: Provide systems that have been tested to show T Rating as indicated or required.

b. Air Leakage: Provide systems that have been tested to show L Rating as indicated, at Smoke Barriers, and elsewhere as indicated or required.

c. Watertightness: Provide systems that have been tested to show W Rating as indicated or required.

C. Joint Firestopping Systems: Systems that resist spread of fire, passage of smoke and other gases, and maintain original fire-resistance rating of assemblies in or between which joint firestopping systems are installed. Joint firestopping systems shall accommodate building movements without impairing their ability to resist the passage of fire and hot gases.

1. Perimeter Fire Containment Firestopping: Use system that has been tested according to ASTM E2307 to have fire resistance F Rating equal to required fire rating of floor assembly.

a. Movement: Provide systems that have been tested to show movement capability as indicated or required.

b. Temperature Rise: Provide systems that have been tested to show T Rating as indicated or required.

c. Air Leakage: Provide systems that have been tested to show L Rating as indicated or required..

d. Where floor assembly is not required to have a fire rating, provide systems that have been tested to show L Rating as indicated or required..

2. Head-of-Wall Joint System Firestopping at Joints Between Fire-Rated Wall Assemblies and Non-Rated Horizontal Assemblies: Use system that has been tested according to ASTM E2837 to have fire resistance F Rating equal to required fire rating of floor or wall, whichever is greater.

a. Movement: Provide systems that have been tested to show movement capability as indicated or required.

3. Floor-to-Floor, Wall-to-Wall, and Wall-to-Floor Joints, Except Perimeter, Where Both Are Fire-Rated: Use system that has been tested according to ASTM E1966 or UL 2079 to have fire resistance F Rating equal to required fire rating of the assembly in which the joint occurs.

a. Movement: Provide systems that have been tested to show movement capability as indicated or required.

b. Air Leakage: Provide systems that have been tested to show L Rating as indicated or required.

c. Watertightness: Provide systems that have been tested to show W Rating as indicated or required.

PART 3 EXECUTION

3.01 EXAMINATION

A. Verify openings are ready to receive the work of this section.

3.02 PREPARATION

A. Clean substrate surfaces of dirt, dust, grease, oil, loose material, or other materials that could adversely affect bond of firestopping material.

B. Remove incompatible materials that could adversely affect bond.

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3.03 INSTALLATION

A. Install materials in manner described in fire test report and in accordance with manufacturer's instructions, completely closing openings.

B. Do not cover installed firestopping until inspected by Owner's Independent Testing Agency.

C. Do not cover installed firestopping until inspected by authorities having jurisdiction.

3.04 IDENTIFICATION

A. General: Install labeling required by code.

B. Wall Identification:

1. Permanently label walls containing penetration firestopping systems with the words "FIRE

/SMOKE BARRIER - PROTECT ALL OPENINGS."

a. Use lettering not less than 3 inches high and with minimum 0.375-inch strokes.

2. Locate in accessible concealed floor, floor-ceiling, or attic space at 15 feet from end of wall and at intervals not exceeding 30 feet.

C. Penetration Identification:

1. Identify each penetration firestopping system with legible metal or plastic labels.

2. Attach labels permanently to surfaces adjacent to and within 6 inches of penetration firestopping system edge so labels are visible to anyone seeking to remove penetrating items or firestopping systems.

3. Use mechanical fasteners or self-adhering-type labels with adhesives capable of permanently bonding labels to surfaces on which labels are placed.

4. Include the following information on labels:

a. The words "Warning - Penetration Firestopping - Do Not Disturb. Notify Building

Management of Any Damage."

b. Manufacturer's name.

c. Installer's name, address, and phone number.

d. Designation of applicable testing and inspecting agency.

e. Date of installation.

3.05 FIELD QUALITY CONTROL

A. Independent Testing Agency: Inspection agency employed and paid by Owner, may examine penetration firestopping in accordance with ASTM E2174, and ASTM E2393.

B. Repair or replace penetration firestopping and joints at locations where inspection results indicate firestopping or joints do not meet specified requirements.

3.06 CLEANING

A. Clean adjacent surfaces of firestopping materials.

3.07 PROTECTION

A. Protect adjacent surfaces from damage by material installation.

END OF SECTION 07 8400

03-09-2026 D.R.1 CONSTRUCTION DOCUMENTS JOINT SEALANTS

07 9200-1

SECTION 07 9200 - JOINT SEALANTS

PART 1 GENERAL

1.01SECTION INCLUDES

A. Nonsag gunnable joint sealants.

B. Self-leveling pourable joint sealants.

C. Joint backings and accessories.

D. Section 07 8400 - Firestopping: Firestopping sealants.

E. Section 07 9100 - Preformed Joint Seals: Precompressed foam, gaskets, and strip seals.

F. Section 08 8000 - Glazing: Glazing sealants and accessories.

G. Section 09 2116 - Gypsum Board Assemblies: Sealing acoustical and sound-rated walls and ceilings.

1.02 REFERENCE STANDARDS

A. ASTM C661 - Standard Test Method for Indentation Hardness of Elastomeric-Type Sealants by Means of a Durometer; 2015 (Reapproved 2022).

B. ASTM C794 - Standard Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants; 2018

(Reapproved 2022).

C. ASTM C834 - Standard Specification for Latex Sealants; 2017 (Reapproved 2023).

D. ASTM C920 - Standard Specification for Elastomeric Joint Sealants; 2018.

E. ASTM C1087 - Standard Test Method for Determining Compatibility of Liquid-Applied Sealants with Accessories Used in Structural Glazing Systems; 2023.

F. ASTM C1193 - Standard Guide for Use of Joint Sealants; 2025.

G. ASTM C1248 - Standard Test Method for Staining of Porous Substrate by Joint Sealants;

2022.

H. ASTM C1330 - Standard Specification for Cylindrical Sealant Backing for Use with Cold Liquid-

Applied Sealants; 2023.

I. ASTM C1521 - Standard Practice for Evaluating Adhesion of Installed Weatherproofing

Sealant Joints; 2019 (Reapproved 2025).

J. ASTM D2240 - Standard Test Method for Rubber Property--Durometer Hardness; 2015

(Reapproved 2021).

1.03 SUBMITTALS

A. See Section 01 3000 - Administrative Requirements, for submittal procedures.

B. Product Data for Sealants: Submit manufacturer's technical data sheets for each product to be used, that includes the following.

1. Physical characteristics, including movement capability, VOC content, hardness, cure time, and color availability.

2. List of backing materials approved for use with the specific product.

3. Substrates that product is known to satisfactorily adhere to and with which it is compatible.

4. Substrates the product should not be used on.

5. Substrates for which use of primer is required.

6. Sample product warranty.

C. Product Data for Accessory Products: Submit manufacturer's technical data sheet for each product to be used, including physical characteristics, installation instructions, and recommended tools.

D. Color Cards for Selection: Where custom colors are not specified, submit manufacturer's color cards showing standard colors available for selection.

E. Samples for Verification: For each sealant color, submit at least three physical samples for color verification.

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1. Provide 1/2 inch wide joint sealant samples formed between two 4 inch long strips of material matching appearance of exposed surfaces adjacent to joint sealants.

F. Preconstruction Laboratory Test Reports: Submit at least four weeks prior to start of installation.

G. Field Quality Control Plan: Submit at least two weeks prior to start of installation.

H. Field Quality Control Log: Submit filled out log for each length or instance of sealant installed, within 10 days after completion of inspections/tests; include bagged test samples and photographic records, if any.

1.04 QUALITY ASSURANCE

A. Manufacturer Qualifications: Company specializing in manufacturing the products specified in this section with minimum 5 years documented experience.

B. Installer Qualifications: Company specializing in performing the work of this section and with at least 5 years of documented experience.

C. Preconstruction Laboratory Testing: Arrange for sealant manufacturer(s) to test each combination of sealant, substrate, backing, and accessories.

1. Adhesion Testing: In accordance with ASTM C794.

2. Compatibility Testing: In accordance with ASTM C1087.

3. Stain Testing: In accordance with ASTM C1248; required only for stone substrates.

4. Allow sufficient time for testing to avoid delaying the work.

5. Deliver to manufacturer sufficient samples for testing.

6. Report manufacturer's recommended corrective measures, if any, including primers or techniques not indicated in product data submittals.

7. Testing is not required if sealant manufacturer provides data showing previous testing, not older than 24 months, that shows satisfactory adhesion, lack of staining, and compatibility.

D. Owner may employ an independent testing agency to perform the field quality control inspection and testing as referenced in PART 3 of this section and as follows, to prepare and submit the field quality control plan and log, and to provide recommendations of remedies in the case of failure.

1. Contractor shall cooperate with testing agency and repair failures discovered.

2. Otherwise, if Owner does not employ an independent testing agency, Contractor shall perform its own field quality control measures including the following:

a. Field Quality Control Plan and Log.

b. Field Adhesion Test Procedures.

E. Field Quality Control Plan:

1. Visual inspection of entire length of sealant joints.

2. Non-destructive field adhesion testing of sealant joints, except interior acrylic latex sealants.

a. For each different sealant and substrate combination, allow for one test every 12 inches in the first 10 linear feet of joint and one test every 120 inches thereafter.

b. If any failures occur in the first 10 linear feet, continue testing at 48 inch intervals at no extra cost to Owner.

F. Field Adhesion Test Procedures:

1. Allow sealants to fully cure as recommended by manufacturer before testing.

2. Have a copy of the test method document available during tests.

3. Record the type of failure that occurred, other information required by test method, and the information required on the Field Quality Control Log.

4. If any combination of sealant type and substrate does not show evidence of minimum adhesion or shows cohesion failure before minimum adhesion, report results to Architect.

5. Non-Destructive Field Adhesion Test: Test for adhesion in accordance with ASTM

C1521, using Nondestructive Spot Method.

a. Record results on Field Quality Control Log.

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b. Repair failed portions of joints.

1.05 WARRANTY

A. See Section 01 7800 - Closeout Submittals, for additional warranty requirements.

B. Correct defective work within a five year period after Date of Substantial Completion.

C. Warranty: Include coverage for installed sealants and accessories that fail to achieve watertight seal , exhibit loss of adhesion or cohesion, or do not cure.

PART 2 PRODUCTS

2.01 JOINT SEALANT APPLICATIONS

A. Scope:

1. Exterior Joints: Seal open joints, whether or not the joint is indicated on drawings, unless specifically indicated not to be sealed. Exterior joints to be sealed include, but are not limited to, the following items.

a. Wall expansion and control joints.

b. Joints between door, window, and other frames and adjacent construction.

c. Joints between different exposed materials.

d. Openings below ledge angles in masonry.

e. Other joints as indicated.

2. Interior Joints: Do not seal interior joints unless specifically indicated to be sealed. Interior joints to be sealed include, but are not limited to, the following items.

a. Joints between door, window, and other frames and adjacent construction.

b. Other joints as indicated.

3. Do not seal the following types of joints.

a. Intentional weepholes in masonry.

b. Joints indicated to be treated with manufactured expansion joint cover or some other type of sealing device.

c. Joints where sealant is specified to be provided by manufacturer of product to be sealed.

d. Joints where installation of sealant is specified in another section.

e. Joints between suspended panel ceilings/grid and walls.

B. Exterior Joints: Use non-sag non-staining silicone sealant, unless otherwise indicated.

1. Control and Expansion Joints in Concrete Paving: Self-leveling silicone traffic-grade sealant.

C. Interior Joints: Use non-sag acrylic emulsion latex sealant, unless otherwise indicated.

1. Interior Sides of Aluminum Framing in Exterior Walls: Use non-sag non-staining silicone sealant, unless otherwise indicated.

a. Includes, but is not limited to, curtain walls, storefronts, and metal-framed skylights.

2. Control Joints in Interior Concrete Slabs: Self-leveling silicone "traffic grade" sealant.

3. Column Isolation Joints in Interior Concrete Slabs: Self-leveling silicone "traffic grade" sealant.

4. Floor Joints in Wet Areas: Self-leveling silicone "traffic grade" sealant; not for continuous liquid immersion

5. Joints between Fixtures in Wet Areas and Floors, Walls, and Ceilings: Mildew-resistant silicone sealant; clear, unless otherwise indicated.

6. Joints between countertops and walls: Mildew-resistant silicone sealant; clear, unless otherwise indicated.

D. Interior Wet Areas: Includes, but is not limited to, toilet rooms, showering areas, locker rooms, kitchens, and food service areas; fixtures in wet areas include plumbing fixtures, food service equipment, countertops, cabinets, and other similar items.

2.02 NONSAG JOINT SEALANTS

A. Non-Staining Silicone Sealant: ASTM C920, Grade NS, Type S, Uses NT, A, G, M and O; not expected to withstand continuous water immersion or traffic.

1. Movement Capability: Plus and minus 50 percent, minimum.

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2. Non-Staining To Porous Stone: Non-staining to light-colored natural stone when tested in accordance with ASTM C1248.

3. Dirt Pick-Up: Reduced dirt pick-up compared to other silicone sealants.

4. Hardness Range: Comply with one of the following:

a. 15 to 35, Shore A, when tested in accordance with ASTM C661.

b. 25 to 35, Shore A, when tested in accordance with ASTM D2240.

5. Color: Custom color(s) to match Architect's sample(s).

6. Cure Type: Single-component, neutral moisture curing.

7. Service Temperature Range: Minus 40 to 250 degrees F.

8. Products:

a. Momentive Performance Materials, Inc./GE; SCS9000 SilPruf NB:

www.siliconeforbuilding.com.

b. Pecora Corporation; 890NST: www.pecora.com.

c. Sika Corporation; Sikasil WS-295 FPS: www.usa.sika.com.

d. Tremco, Inc.; Spectrem 3: www.tremcosealants.com.

e. Dow Chemical Company; DOWSIL 790 Silicone Building

Sealant: consumer.dow.com/en-us/industry/ind-building-construction.html/#sle.

f. Substitutions: See Section 01 6000 - Product Requirements.

B. Traffic Grade Silicone Sealant: ASTM C920, Grade NS, Type S, Uses T, M, and O; not expected to withstand continuous water immersion.

1. Movement Capability: Plus 100 percent, minus 50 percent, minimum

2. Hardness Range: Comply with one of the following:

a. 5 to 15, Shore A, when tested in accordance with ASTM C661.

b. 85, Shore 00, when tested in accordance with ASTM C661.

3. Color: To be selected by Architect from manufacturer's full range.

4. Cure Type: Single-component, neutral moisture curing.

5. Service Temperature Range: Minus 40 to 250 degrees F.

6. Products:

a. Dow Corning; NS Parking Structure Sealant: www.dowcorning.com.

b. Pecora Corporation; 311NS: www.pecora.com.

c. Sika Corporation; Sikasil - 728 NS: www.usa.sika.com.

d. Tremco, Inc.; Spectrem 800: www.tremcosealants.com.

e. Substitutions: See Section 01 6000 - Product Requirements.

C. Mildew-Resistant Silicone Sealant: ASTM C920, Grade NS, Type S, Uses NT, A, G, and O;

mildew resistant; not expected to withstand continuous water immersion or traffic.

1. Movement Capability: Plus and minus 25 percent, minimum.

2. Hardness Range: Comply with one of the following:

a. 15 to 35, Shore A, when tested in accordance with ASTM C661.

b. 25 to 35, Shore A, when tested in accordance with ASTM D2240.

3. Color: Clear.

4. Cure Type: Single-component, acetoxy or neutral moisture curing .

5. Service Temperature Range: Minus 40 to 300 degrees F.

6. Products:

a. Dow Corning; 786 Sealant M: www.dowcorning.com.

b. Momentive Performance Materials, Inc./GE; SCS1700 Sanitary:

www.siliconeforbuilding.com.

c. Pecora Corporation; 898NST: www.pecora.com.

d. Sika Corporation; Sikasil - GP: www.usa.sika.com.

e. Tremco, Inc.; Tremsil 200 with fungicide: www.tremcosealants.com.

f. Substitutions: See Section 01 6000 - Product Requirements.

D. Acrylic Emulsion Latex: Water-based; ASTM C834, single component, non-staining, non-bleeding, non-sagging; not intended for exterior use. Siliconized.

1. Color: To be selected by Architect from manufacturer's full range.

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2. Grade: ASTM C834; Grade Minus 18 Degrees C (0 Degrees F).

3. Products:

a. Franklin International Inc; Titebond Painter's Plus Caulk: www.titebond.com.

b. Pecora Corporation; AC-20 +Silicone: www.pecora.com.

c. Sherwin Williams; 950A Siliconized Acrylic Latex Caulk: www.sherwin-williams.com.

d. Tremco, Inc.; Tremflex 834: www.tremcosealants.com.

e. Substitutions: See Section 01 6000 - Product Requirements.

2.03 SELF-LEVELING SEALANTS

A. Self-Leveling Silicone Sealant: ASTM C920, Type S, Grade P, Uses T, M and O; single-component, explicitly approved by manufacturer for traffic exposure when recessed below traffic surface; not expected to withstand continuous water immersion.

1. Movement Capability: Plus 100 percent, minus 50 percent, minimum.

2. Hardness Range: Comply with one of the following:

a. 5 to 20, Shore A, when tested in accordance with ASTM C661.

b. 40 to 85, Shore 00, when tested in accordance with ASTM D2240.

3. Color: To be selected by Architect from manufacturer's full range.

4. Cure Type: Single-component, neutral moisture curing.

5. Service Temperature Range: Minus 50 to 300 degrees F.

6. Products:

a. Dow Corning; SL Parking Structure Sealant: www.siliconeforbuilding.com.

b. Pecora Corporation; 310SL: www.pecora.com.

c. Sika Corporation; Sikasil-728 SL: www.usa.sika.com.

d. Tremco, Inc.; Spectrem 900SL: www.tremcosealants.com.

e. Substitutions: See Section 01 6000 - Product Requirements.

2.04 ACCESSORIES

A. Backer Rod: Cylindrical cellular foam rod with surface that sealant will not adhere to, compatible with specific sealant used, and recommended by backing and sealant manufacturers for specific application.

1. Type for Joints Not Subject to Pedestrian or Vehicular Traffic: ASTM C1330; Type B - Bi- Cellular Polyethylene.

2. Type for Joints Subject to Pedestrian or Vehicular Traffic: ASTM C1330; Type B - Bi- Cellular Polyethylene.

3. Bi-Cellular: 25 to 33 percent larger in diameter than joint width.

B. Backing Tape: Self-adhesive polyethylene tape with surface that sealant will not adhere to and recommended by tape and sealant manufacturers for specific application.

C. Masking Tape: Self-adhesive, nonabsorbent, non-staining, removable without adhesive residue, and compatible with surfaces adjacent to joints and sealants.

D. Primers: Type recommended by sealant manufacturer to suit application; non-staining.

PART 3 EXECUTION

3.01 EXAMINATION

A. Verify that joints are ready to receive work.

B. Verify that backing materials are compatible with sealants.

C. Verify that backer rods are of the correct size.

3.02 PREPARATION

A. Remove loose materials and foreign matter that could impair adhesion of sealant.

B. Clean joints, and prime as necessary, in accordance with manufacturer's instructions.

C. Perform preparation in accordance with manufacturer's instructions and ASTM C1193.

D. Mask elements and surfaces adjacent to joints from damage and disfigurement due to sealant work; be aware that sealant drips and smears may not be completely removable.

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E. Concrete Floor Joints That Will Be Exposed in Completed Work: Test joint filler in inconspicuous area to verify that it does not stain or discolor slab.

3.03 INSTALLATION

A. Perform work in accordance with sealant manufacturer's requirements for preparation of surfaces and material installation instructions.

B. Perform installation in accordance with ASTM C1193.

C. Measure joint dimensions and size joint backers to achieve width-to-depth ratio, neck dimension, and surface bond area as recommended by manufacturer.

D. Install bond breaker backing tape where backer rod cannot be used.

E. Install sealant free of air pockets, foreign embedded matter, ridges, and sags, and without getting sealant on adjacent surfaces.

F. Do not install sealant when ambient temperature is outside manufacturer's recommended temperature range, or will be outside that range during the entire curing period, unless manufacturer's approval is obtained and instructions are followed.

G. Nonsag Sealants: Tool surface concave, unless otherwise indicated; remove masking tape immediately after tooling sealant surface.

H. Concrete Floor Joint Filler: After full cure, shave joint filler flush with top of concrete slab.

I. Installation of Two-Stage Joints at Precast Architectural Concrete Units:

1. Joint system consists of two back-to-back sealant joints at each precast architectural concrete unit joint with a weep at the bottom of the unit joint per Precast/Prestressed Concrete Institute (PCI) recommendations and as follows:

a. Inner (Secondary) Seal: Inner secondary backer rod and sealant joint is installed a minimum of 2 to 2-1/2 inches beyond the exposed face of the precast architectural concrete panels within the panel joint itself.

b. Exterior (Primary) Seal: Following the installation of the secondary joint, the outer primary backer rod and sealant joint is installed at the face of the precast architectural concrete panels with a weep at the bottom of the joint. Leave open continuous air space between the primary backer rod and inner secondary seal.

c. Install 3/8 inch minimum weep openings in the exterior seal to allow water penetrating the exterior seal and contained by the inner seal to exit the cavity between joint seals.

1) Do not install weeps below finish grades.

d. Near the junction of horizontal and vertical joints, the inner seal must turn out to the plane of the exterior seal at regular intervals to force water out of the joint.

3.04 FIELD QUALITY CONTROL

A. Owner may employ an independent testing agency to perform field quality control inspection and testing as specified in PART 1 under QUALITY ASSURANCE article.

B. Non-Destructive Adhesion Testing: If there are any failures in first 100 linear feet, notify

Architect immediately.

C. Remove and replace failed portions of sealants using same materials and procedures as indicated for original installation.

END OF SECTION 07 9200