final 07 92 00 Joint Sealers.pdf

OFFUTT AIR FORCE BASE

(092036) 07 92 00-1 (Repair AHU O-Club, B462)

2010 by FEI

SECTION 07 92 00

JOINT SEALERS

PART 1 - GENERAL

1.1 SCOPE

A. Work required under this Section includes all labor, materials, tools and equipment necessary to complete all work relative to the provision and installation of all exterior and interior sealants where the words caulk, caulking, or sealant are shown on the drawings and at additional locations as required by the specifications. Included are all joint fillers, backer rods and gaskets. Work within this section shall be completely coordinated with work of other trades.

B. Although such work may not be specifically shown or specified, provide and install all supplementary or miscellaneous items, appurtenances and devices incidental to or necessary for a sound, secure and complete installation.

C. The required applications include, but are not necessarily limited to, the following:

1. Joints at penetrations for non - rated construction, interior penetrations.

2. Joints at penetrations for non - rated exterior penetrations.

3. Joints between items of equipment and other interior construction.

4. Miscellaneous Exterior Joints.

5. Miscellaneous Interior Joints.

6. Exterior joints between dissimilar materials

7. At other locations noted on the drawings

D. The material and installation shall conform to the applicable local building code requirements, and all authorities having jurisdiction.

E. Notwithstanding reference to any manufactured or produced item or material in this specification that contains asbestos, materials or items that contain asbestos are not acceptable.

1.2 RELATED WORK

A. Fire sealants are specified elsewhere in Division 23.

B. Certain requirements for caulking and sealants may be required in other sections of the specifications.

1.3 CODES, SPECIFICATIONS AND STANDARDS

A. Publications listed below form a part of this specification to extent referenced. Publications are referenced in the text by basic designation only. Any material or operation specified by reference to the published specifications of a manufacturer or other referenced specification or standard shall comply with the requirements of the latest edition. In case of a conflict between a referenced specification or standard and these project specifications the more stringent requirement shall govern.

B. Comply with the applicable provisions of the following codes, specifications and standards to the extent indicated by reference thereto.

1. American Society of Testing and Materials - ASTM C 834 “Standard Specification for Latex Sealants”.

2. American Society of Testing and Materials - ASTM C 920 “Standard Specification for

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Elastomeric Joint Sealants”.

3. American Society of Testing and Materials - ASTM D 1667 “Standard Specification for Flexible Cellular Materials-Vinyl Chloride Polymers and Copolymers (Closed - Cell Foam)”.

1.4 QUALITY ASSURANCE

A. Manufacturers: Firms with not less than 5 years of successful experience in production of types of sealants and caulking compounds required for this project.

B. Installer: A firm with a minimum of 5 years of successful experience in application of types of materials required.

1.5 SUBMITTALS

A. Manufacturer's Data, Joint Sealers: Submit manufacturer's specifications, recommendations and installation instructions for each type of material required. Include manufacturer's published data, or letter of certification, or certified test laboratory report indicating that each material complies with specified standards and other requirements, and is intended generally for applications shown.

B. Samples, Joint Sealers: Submit three (3) twelve (12) inch long samples of each color required for each type of joint sealer exposed to view. Install sample between 2 strips of material similar to or representative of typical surfaces where sealer will be used, held apart to represent typical joint widths. For multi - component materials, factory made samples will be acceptable.

1.6 JOB CONDITIONS

A. Installer must examine joint surfaces and backing, and their anchorage to the structure, and conditions under which joint sealer work is to be performed, and notify Contracting Officer in writing of conditions detrimental to proper completion of the work and performance of sealers. Verify that size of joint is as shown on drawings or as required for proper sealant installation. If joint is wider than shown or required, cost of additional material to properly fill the joint will not be an additional cost to the Owner.

Do not proceed with joint sealer work until unsatisfactory conditions have been corrected in a manner acceptable to Installer.

B. Weather Conditions: Do not proceed with installation of sealants under adverse weather conditions, or when temperatures are below or above manufacturer's recommended temperature range for installation or when temperatures of surfaces at the joint are below 40 degrees F exterior and 60 degrees F interior. Proceed with the work only when forecasted weather conditions are favorable for proper cure and development of high early bond strength.

C. Do not proceed with installation of joint sealants where joint widths are less than allowed by joint sealant manufacturer for application indicated.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials to project 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

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2.1 MATERIALS, GENERAL

A. Colors: For exposed materials provide color as indicated or, if not indicated, as selected by Contracting Officer’s Representative from manufacturer's standard colors. For concealed materials, provide natural color which has best overall performance characteristics.

B. Hardness: As recommended by manufacturer for application shown, unless otherwise indicated.

C. Modulus of Elasticity: Provide the lowest available modulus of elasticity which is consistent with exposure to weathering, indentation, vandalism, abrasion, support of loading, and other requirements.

D. Compatibility: Before purchase of each required material, confirm its compatibility with each other material it will be exposed to in joint system. Install sealants to establish and maintain watertight and airtight continuous seals without causing staining or deterioration of joint substrates.

E. Size and Shape: As shown or, if not shown, as recommended by manufacturer for type and condition of joint, and for indicated joint performance or movement.

F. Grade of Sealant: For each application, provide grade of sealant (non - sag, self - leveling, no - track, knife grade, preformed, etc.) as recommended by manufacturer for particular condition of installation (location, joint shape, ambient temperature, and similar conditions), to achieve best possible overall performance. Grades specified herein are for normal condition of installation.

G. Foot Traffic Exposures: In sealant locations subject to foot traffic, provide manufacturer's non -tracking variation of specified sealant, capable of withstanding stiletto heel traffic without damaging indentation.

2.2 ELASTOMERIC SEALANTS

A. Multi - Component Oligomeric Polyurethane Sealant complying with ASTM C902, Type M, Grade NS, Class 25.

1. Subject to compliance with these specifications provide one of the following products:

a. Dymeric 511; Tremco

B. Multi - Component Epoxidized Polyurethane Sealant complying with ASTM C902,Type M, Grade NS, Class 25.

1. Subject to compliance with these specifications provide one of the following products:

a. Dymeric 240; Tremco

C. Multi - Component General Purpose Polyurethane Sealant complying with ASTM C902, Type M, Grade NS, Class 25.

1. Subject to compliance with these specifications provide one of the following products:

a. Sonolastic NP - 2; Sonneborn

b. Vulkem 227; Tremco

D. Single - Component General Purpose Polyurethane Sealant complying with ASTM C902, Type S, Grade NS, Class 25.

1. Subject to compliance with these specifications provide one of the following products:

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a. Sonolastic NP 1; Sonneborn

b. Vulkem 116; Tremco

c. Dynatrol; Pecora Corp.

E. Single - Component Low Modulus, General Purpose Polyurethane Sealant complying with ASTM C902, Type S, Grade NS, Class 25.

1. Subject to compliance with these specifications provide one of the following products:

a. Vulkem 921; Tremco

F. Single - Component Medium Modulus, Neutral Cure Silicone Sealant complying with ASTM C920, Type S, Grade NS, Class 25.

1. Subject to compliance with these specifications provide one of the following products:

a. Sonolastic Omniseal; Sonneborn

b. Tremsil 600; Tremco

c. 791 Silicone Perimeter Sealant; Dow Corning

2.3 NON - ELASTOMERIC SEALANTS

A. Siliconized Acrylic Latex Sealant complying with ASTM C 834 that accommodates joint movement of not more than 12.5 percent of the minimum joint width.

1. Provide one of the following products:

a. Sonoplastic; Sonneborn

b. AC - 20 + Silicone; Pecora Corp.

c. Tremflex 834; Tremco

B. Butyl Rubber and Polyisobutylene Sealant.

1. Subject to compliance with these specifications provide one of the following products:

a. Butyl Sealant; Tremco

b. BC - 158 Butyl Rubber Sealant; Pecora Corp.

2.4 GASKETS

A. Closed - Cell PVC Gasket:

1. Provide closed - cell, flexible, self adhesive, non - extruding, polyvinyl chloride foam gaskets complying with ASTM D1667, Grade VE 41 BL (2 to 5 pounds per square inch for 25 percent compression); except provide a higher compression deflection grade if necessary to maintain a watertight and airtight seal; provide pressure - sensitive adhesive on one face.

2. Subject to compliance with requirements, acoustical joint sealants that may be incorporated in the Work include, but are not limited to, the following:

a. "Norseal V - 730" Norton Sealants.

2.5 MISCELLANEOUS MATERIALS

A. Joint Cleaner: Provide type of joint cleaning compound recommended by sealant or caulking

(092036) 07 92 00-5 (Repair AHU O-Club, B462) compound manufacturer, for joint surfaces to be cleaned.

B. Joint Primer / Sealer: Provide type of joint primer / sealer recommended by sealant manufacturer, for joint surfaces to be primed or sealed.

C. Bond Breaker Tape: Polyethylene tape or other plastic tape as recommended by sealant manufacturer, to be applied to sealant - contact surfaces where bond to substrate or joint filler must be avoided for proper performance of sealant. Provide self-adhesive tape where applicable.

D. Sealant Backer Rod: Compressible rod stock polyethylene foam, polyethylene jacketed polyurethane foam, butyl rubber foam, neoprene foam or other flexible, permanent, durable non - absorptive material as recommended for compatibility with sealant by the sealant manufacturer. Provide size and shape of rod which will control joint depth for sealant placement, break bond of sealant at bottom of joint, form optimum shape of sealant bead on back side, and provide a highly compressible backer to minimize possibility of sealant extrusion when joint is compressed.

E. Masking Tape: Non - staining, nonabsorbent material compatible with joint sealants and surfaces adjacent to joints.

PART 3 - EXECUTION

3.1 MANUFACTURER'S INSTRUCTIONS

A. Comply with manufacturer's printed instructions except where more stringent requirements are shown or specified, and except where manufacturer's technical representative directs otherwise.

3.2 JOINT PREPARATION

A. Clean joint surfaces immediately before installation of sealant or caulking compound. Remove dirt, insecure coatings, moisture and other substances which would interfere with bond of sealant or caulking compound. Etch concrete and masonry joint surfaces as recommended by sealant manufacturer. Roughen vitreous, porcelain enamel, or glazed joint surfaces as recommended by sealant manufacturer.

B. Prime or seal joint surfaces where shown or recommended by sealant manufacturer. Do not allow primer / sealer to spill or migrate onto adjoining surfaces.

3.3 INSTALLATION

A. Set joint filler units at proper depth or position in joint to coordinate with other work, including installation of bond breakers, backer rods and sealants. Do not leave voids or gaps between ends of joint filler units.

B. Install sealant backer rod for elastomeric sealants, except where shown to be omitted or recommended to be omitted by sealant manufacturer for application shown.

C. Install bond breaker tape where shown and where required by manufacturer's recommendations to ensure that elastomeric sealants will perform properly.

D. 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. Except as otherwise indicated, fill sealant rabbet to a slightly concave surface, slightly below adjoining surfaces. Where horizontal joints are between a horizontal surface and vertical surface, fill joint to form a slight cove, so that joint will not trap moisture and dirt.

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E. Install sealant to depths as shown or, if not shown, as recommended by sealant manufacturer but within the following general limitations, measured at center (thin) section of bead:

1. For normal moving joints sealed with elastomeric sealants but not subject to traffic, fill joints to a depth equal to 50 percent of joint width, but neither more than 1/2 inch deep nor less than 1/4 inch deep.

2. For joints sealed with non - elastomeric sealants and caulking compounds, fill joints to a depth in range of 75 percent to 125 percent of joint width.

F. Spillage: Do not allow sealants or compounds to overflow or spill onto adjoining surfaces, or to migrate into voids of adjoining surfaces. Clean adjoining surfaces by whatever means may be necessary to eliminate evidence of spillage.

G. Do not overheat hot - applied sealants.

H. Recess exposed edges of gaskets and joint fillers slightly behind adjoining surfaces, unless otherwise shown, so that compressed units will not protrude from joints.

I. Bond ends of gaskets together with adhesive or "weld" by other means as recommended by manufacturer to ensure continuous watertight and airtight performance. Miter - cut and bond ends at corners unless molded corner units are provided.

J. For sealants applied to joints which occur in conjunction with waterproofing, install sealant prior to application of waterproofing.

K. 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.

3.4 TESTING

A. Contractor shall provide adhesion testing of sealants by an approved Representative of the Manufacturer. A minimum of one test per 2,000 lineal feet of each sealant used and in addition where adhesion appears to be failing.

3.5 CURE AND PROTECTION

A. Cure sealants and caulking compounds in compliance with manufacturer's instructions and recommendations, to obtain high early bond strength, internal cohesive strength and surface durability. Advise of procedures required for cure and protection of joint sealers during construction period, so that they will be without deterioration or damage (other than normal wear and weathering) at time of Government's acceptance.

3.6 SEALANT SCHEDULE

A. Provide the following types of joint sealers in the respective joints as listed below:

1. Joints at penetrations for non - rated construction, interior penetrations - Provide one of the following types of sealant:

a. Siliconized Acrylic Latex Sealant.

2. Joints at penetrations for non - rated exterior penetrations: one or two component

(092036) 07 92 00-7 (Repair AHU O-Club, B462) polyurethane - Provide one of the following types of sealant:

a. Multi - Component Oligomeric Polyurethane Sealant.

b. Multi - Component Epoxidized Polyurethane Sealant.

c. Single - Component Low Modulus, General Purpose Polyurethane Sealant.

d. Single - Component Medium Modulus, Neutral Cure Silicone Sealant.

3. Joints between items of equipment and other interior construction - Provide one of the following types of sealant:

a. Siliconized Acrylic Latex Sealant.

4. Interior Joints at Door and Window Frames - Provide one of the following types of sealant:

a. Siliconized Acrylic Latex Sealant

5. Exterior Joints at Door and Window Frames - Provide one of the following types of sealant:

a. Multi - Component General Purpose Polyurethane Sealant.

b. Single - Component General Purpose Polyurethane Sealant.

c. Single - Component Low Modulus, General Purpose Polyurethane Sealant.

6. Miscellaneous Exterior Joints not identified above - Provide one of the following types of sealant:

a. Multi - Component General Purpose Polyurethane Sealant.

b. Single - Component General Purpose Polyurethane Sealant.

c. Single - Component Low Modulus, General Purpose Polyurethane Sealant.

7. Miscellaneous Interior Joints not identified above - Provide one of the following types of sealant:

a. Siliconized Acrylic Latex Sealant.

8. Exterior joints between dissimilar metal materials - Provide one of the following types of sealant:

a. Butyl Rubber and Polyisobutylene Sealant.

END OF SECTION