SECTION JOINT SEALANTS

Transcription

1 SECTION JOINT SEALANTS PART 1 GENERAL 1.0 RELATED DOCUMENTS 1. Drawings and general provisions of Contract, including General and Supplementary Conditions and other Division-01 Specification Sections, apply to this Section. 2. Section Rough Carpentry 3. Section Weather Barriers 4. Section Flashing and Sheet Metal 5. Section Painting 1.1 SUMMARY A. Section Includes: Joint sealants for following locations, including cleaning and preparation of sealant substrate surfaces and sealant backings: 1. Exterior joints in vertical surfaces and nontraffic horizontal surfaces. 2. Exterior joints in horizontal traffic surfaces. 3. Interior joints in vertical surfaces and nontraffic horizontal surfaces. 4. Fire-resistive elastomeric joint sealants. 5. Use of materials as required, many additional specified. 1.2 SYSTEM PERFORMANCE REQUIREMENTS A. Establish and maintain watertight and airtight continuous building seals without causing staining or deterioration of joint substrates. B. Establish and maintain airtight continuous seals for interior application that are water resistant and cause no staining or deterioration of joint substrates. C. Fire-Resistive Construction Joint Sealants: Joint sealants with fire-resistance ratings indicated, as determined per ASTM E 119, but not less than that equaling or exceeding the fire-resistance rating of the construction in which the joint occurs, where required by code if interior finish damaged in selective demolition. 1.3 SUBMITTALS A. Comply with requirements of Section B. Product Data: 1. Manufacturer s technical information for each joint sealer product required. Include installation procedures for each type of substrate. 2. Submit to the Owner and post on job site, for information purposes only, the manufacturer s Material Safety Data Sheets (MSDS) for each product which emits volatile organic compounds (VOCs); where MSDS not available, submit other test data, which describe the VOC emissions

2 C. Samples Initial Selection: Submit in form of manufacturer s standard bead samples, consisting of strips of actual products, showing full range of colors available for each product exposed to view. D. Certificates: Certification from manufacturers of joint sealants attesting that their products comply with specification requirements and are suitable for the use indicated. 1.4 QUALITY ASSURANCE A. Elastomeric Sealant: Manufacturer s standard chemically curing elastomeric sealant of base polymer indicated, compliance with ASTM C 920. B. Fire-Rated Construction Joint Sealant: Fire-resistive construction joint sealant systems, including backing materials, identical to those tested per ASTM E 119 and bearing classification marking of qualified testing and inspection agency. C. Single Source Responsibility: Obtain joint sealant materials from a single source and by one manufacturer for each different product. D. Compatibility: Provide joint sealants, joint fillers and other related materials that are compatible with one another and with joint substrates under conditions of service and application, as demonstrated by sealant manufacturer based on testing and field experience. 1.5 DELIVERY, STORAGE AND HANDLING A. Deliver materials to site in original unopened containers or bundles with labels indicating manufacturer, product name and designation, color, expiration period for use, pot life, curing time and mixing instructions for multi-component materials. B. Store and handle materials in compliance with manufacturer s recommendations to prevent their deterioration or damage due to moisture, high or low temperatures, contaminants or other causes. PART 2 PRODUCTS 2.1 MATERIALS, GENERAL A. Non-rated Construction Joints: Provide scheduled standard elastomeric sealant unless otherwise indicated. B. Fire-Rated Construction Joints: Provide fire-resistive construction joint sealant systems, including backing materials, identical to those tested per ASTM E 119. In dynamic moving joints, provide system tested to UL C. Colors Exposed Joint Sealers: 1. Elastomeric Sealants (ES): Do not paint over joints, as working of elastomeric sealants tends to chip and flake off dry paint films. 2. Latex Sealants (LS): Provide manufacturer s standard color and allow joints to be painted over, as hardness and low movement do not affect paint film

3 D. Color Selections Elastomeric Sealants: As selected by Architect from manufacturer s standard colors, to match or blend with material or paint color for adjacent surfaces. 2.2 ELASTOMERIC JOINTS SEALANTS A. General: Manufacturer s standard chemically curing elastomeric sealants that comply with ASTM C 920 and other requirements indicated below, including referenced classifications for Type, Grade and Uses. B. Additional Movement Capability: Where additional movement capability is specified, provide products with the capability, when tested for adhesion and cohesion under maximum cyclic movement per ASTM C 719, to withstand the specified percentage change in the joint width existing at time of installation and remain in compliance with other requirements of ASTM C 920 for Uses indicated. C. Subject to compliance with requirements, products that may be incorporated in the Work may include, but are not limited to, those specified in this Article for each sealant Type. Submit for approval if not listed. D. Type ES1 Multi-Part Nonsag Polyurethane Sealant: Type M; Grade NS; Class 25; Use (Exposure) NT; Uses (Substrates) M, A, and O as applicable (Use-O joint substrates include: Metal factory-coated with a high-performance coating; galvanized steel; ceramic tile). Sikaflex-2c / NS Sika Corp. Sonolastic NP 2 Sonneborn Building Products Div. Dymonic Tremco E. Type ES2 One-Part Nonsag Urethane Sealant: Type S; Grade NS; Class 25; Use (Exposure) NT; Uses (Substrates) M, A, and O as applicable (Use-O joint substrates include: Metal factory-coated with a high-performance coating; galvanized steel; ceramic tile). Sikaflex-1a Sika Corp. Sonolastic NP 1 Sonneborn Building Products. Dymonic Tremco Inc. F. Type ES3 Multi-Part Pourable Urethane Sealant: Type M; Grade P; Class 25; Use (Exposure) T; Uses (Substrates) M, and O as applicable (Use-O joint substrates include; Metal factory-coated with a high-performance coating; galvanized steel; ceramic tile). Sikaflex-2c / SL Sika Corp. Sonolastic Paving Joint Sealant Sonneborn Building Products. THC-900 Tremco Inc. G. Type ES4 Single-Part Pourable Urethane Sealant: NOT USED H. Type ES5 One-Part Neutral Curing Silicone, Medium Modulus Sealant: NOT USED I. Type ES6 One-Part Mildew-Resistant Silicone Sealant: Type S, Grade NS; Class 25; Use (Exposure) NT; Uses (Substrates) M, G, A, and O as applicable; formulated with

4 fungicide; intended for sealing interior joints with nonporous substrates exposed to high humidity and temperature extremes (Use-O joint substrates include: Metal factory-coated with a high-performance coating; galvanized steel; ceramic tile). Dow Corning 786 Dow Corning Corp. SCS 1702 Sanitary General Electric Co. J. Type FR Fire-Rated Construction Joint Sealant: One-part neutral cure construction-gap firestopping products listed in UL Fire Resistance Directory for the UL Design Systems involved, subject to compliance with requirements of this Section. Dow Corning Fire Stop Sealant Hilti FS 601 Elastomeric Firestop Sealant STI Pensil 300 Joint Sealant MMM Fire Barrier Caulk CP JOINT FILLERS A. Type LS Acrylic-Emulsion Sealant: ASTM C 834; manufacturer s standard, one part, nonsag, acrylic, mildew-resistant, paintable, latex sealant that is recommended for exposed applications on interior locations and that accommodates joint movement of not more than 5 percent in both extension and compression for a total of 10 percent without failing either adhesively or cohesively. Subject to compliance with requirements, provide one of the following: AC-20 Pecora Corp. Sonolac Sonneborn Building Products Div. Tremco Acrylic Latex 834 Tremco Inc. B. Acoustical Sealant for Concealed, Nonrated Joints: Manufacturer s standard, nondrying, nonhardening, nonskinning, nonstaining, gunnable, synthetic rubber sealant recommended for sealing interior concealed joints to reduce transmission of airborne sound. Subject to compliance with requirements, provide one of the following: BA-98 Pecora Corp. Tremco Acoustical Sealant Tremco Inc. 2.4 TAPE SEALANTS A. Manufacturer s standard, solvent-free, butyl based tape sealant with a solids content of 100 percent, formulated to be nonstaining, paintable, and nonmigrating in contact with nonporous surfaces with or without reinforcement thread to prevent stretch and packaged on rolls with a release paper on one side. B. Subject to compliance with requirements, provide one of the following: Extru-Seal Tape Pecora Corp. PTI 606 Protective Treatments, Inc. MBT-35 Tremco Inc. 2.5 JOINT SEALANT BACKING A. General: Material and type that are nonstaining; are compatible with joint substrates, sealants, primers, and other joint fillers and are approved for applications indicated by sealant manufacturer based on field experience and laboratory testing

5 B. Plastic Foam Joint-Fillers: Preformed, compressible, resilient, nonwaxing, nonextruding strips of plastic foam and of size, shape and density to control sealant depth and otherwise contribute to producing optimum sealant performance. 1. Flexible, open-cell polyurethane foam. 2. Nongassing, closed-cell polyethylene foam. C. Elastomeric Tubing Joint-Fillers: 1. ASTM D 1056, neoprene, butyl, EPDM, or silicone tubing, nonabsorbent to water and gas, capable of remaining resilient at temperatures down to 26 degree F (-32 degree C). 2. Provide products with low compression set and of size and shape to provide a secondary seal, to control sealant depth an otherwise contribute to optimum sealant performance. D. Bond-Breaker Tape: 1. Polyethylene tape or other plastic tape as recommended by sealant manufacturer for preventing bond between sealant and joint filler or other materials at back of joint where such adhesion would result in sealant failure. 2. Provide self-adhesive tape where applicable. 2.6 MISCELLANEOUS MATERIALS A. Primer: As recommended by joint sealer manufacturer where required for adhesion of sealant to joint substrates indicated. B. Masking Tape: Nonstaining, nonabsorbent material compatible with joint sealants and surfaces adjacent to joints. C. Bituminous Fiber Joint Filler: ASTM D 1751, preformed strips of asphalt saturated fiberboard. PART 3 EXECUTION 3.1 PREPARATION A. Surface Cleaning of Joints: Clean out joints immediately before installing joint sealants to comply with recommendations of joint sealant manufacturer. 1. Remove all foreign matter from joint substrates that could interfere with adhesion of joint sealant, including paints other than permanent, protective coatings tested and approved for sealant adhesion and compatibility by sealant manufacturer. 2. Clean porous joint substrate surfaces by brushing, grinding, blast cleaning, mechanical abrading, or a combination of these methods to produce a clean, sound substrate capable of developing optimum bond with joint sealants. 3. Clean metal, glass, glazed surfaces of ceramic tile, and other nonporous surfaces with chemical cleaners or other means that do not stain, harm substrates, or leave residues capable of interfering with adhesion of joint sealants. B. Joint Priming: Prime joint substrates where indicated or where recommended by joint sealant manufacturer. 1. Apply primer to comply with joint sealant manufacturer s recommendations

6 2. Confine primers to areas of joint sealant bond; do not allow spillage or migration onto adjoining surfaces. C. Masking Tape: Use masking tape where required to prevent contact of sealant with adjoining surfaces that otherwise would be permanently stained or damaged by such contact or by cleaning methods required to remove sealant smears. Remove tape immediately after tooling, without disturbing joint seal. 3.2 INSTALLATION A. Comply with joint sealer manufacturer s instructions applicable to products and applications indicated. B. Install firestopping materials in accordance with manufacturer s published details and written instructions, per applicable assembly in UL Fire Resistance Directory, Volume 2, or applicable Warnock Hersey International assembly. C. Comply with recommendations of ASTM C 1193 for use of joint sealants as applicable to materials, applications, and conditions indicated. D. Comply with recommendations of ASTM C 919 for use of joint sealants in acoustical applications as applicable to materials, applications, and conditions indicated. E. Install sealant backer rod for liquid sealants, except recommended to be omitted by sealant manufacturer for the application shown. F. Install bond breaker tape where shown or where required by manufacturer s recommendations to ensure that elastomeric sealants will perform properly. G. Employ only proven installation techniques, which will ensure that sealants will be deposited in uniform, continuous ribbons without gaps or air pockets, with complete wetting of joint bond surfaces equally on opposite sides. H. Do not allow sealants or compounds to overflow or spill onto adjoining surfaces, or to migrate into voids of adjoining surfaces. I. Verify and conform to siding manufacturer s compatible materials and installation requirements. 3.3 CLEANING A. Clean off excess compound by methods and cleaning materials approved by sealant manufacturer. B. Remove excess and spillage or compounds promptly as the work progresses. C. Clean adjoining surfaces by whatever means may be necessary to eliminate evidence of spillage, without damage to adjoining surfaces or finishes. 3.4 JOINT SEALER SCHEDULE A. Type ES1 (Two-Part Nonsag Polyurethane) Exterior and interior joints in vertical surfaces; perimeter joints of metal frames in exterior

7 walls; exterior overhead joints B. Type ES2 (One-Part Nonsag Urethane) C. Type ES3 (Multi-Part Pourable Urethane) D. Type ES6 (One-Part Mildew Resistant Silicone) E. Type FR (One-Part Fire Rated Sealant) Exposed exterior joints in flashing and coping joints, and reglets Exterior and interior traffic joints in horizontal surfaces of concrete, tile Exposed interior perimeter joints around plumbing fixtures Perimeter of fire rated interior wall and ceiling assemblies F. Type LS (Acrylic Emulsion) Interior joints in gypsum drywall construction where no movement can be reasonably anticipated G. Other Types As indicated by product manufacturer END OF SECTION