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21 Apr

320 Professional Pressure Sensitive Adhesive for Carpet Tile

Posted by Larry

AAT-320 Professional Pressure Sensitive Adhesive

Specification Sheet

AAT’s Go2 Adhesive formulas have been formulated to ensure superior adhesive performance under the very demanding conditions commonly found in today’s fast paced construction. As a Go2 Adhesive AAT-320 raises the bar for the performance of pressure sensitive adhesives. The brand new formula means that contractors may install carpet tile and vinyl backed broadloom carpet over concrete subfloors with elevated moisture emissions or in situ relative humidity levels. AAT-320 may also be used to install vinyl tile (LVT) and approved carpet cushions in double-glue installations. The CRI Green-label Plus Adhesive Certification Program has certified AAT-320 as a “low VOC” adhesive. AAT-320 is a fast drying, pressure sensitive adhesive specifically formulated for the installation of carpet tiles and double-glue padding over commonly encountered smooth, clean sub-floors. AAT-320 is non-flammable, water resistant and has excellent vinyl plasticizer migration resistance. Like all of our adhesives, this adhesive is protected by the CleanGuard® two-stage antimicrobial. CleanGuard is a specifically formulated broad-spectrum, anti-microbial agent that protects our adhesives and sealers from microorganisms, such as mold or mildew, in both the wet and dry state. AAT-320 Professional Pressure Sensitive Adhesive is recommended for the following carpet tile backings and floor coverings: Modular carpet, carpet tile: PVC, ethylene vinyl acetate (EVA), polypropylene, polyurethane cushion, bitumen Vinyl tile ( square LVT) Approved carpet cushion AAT-320 may contribute to the LEED certification of projects in the following categories: IEQ Credit 4.1—Low Emitting Materials – Adhesives & Sealants IEQ Credit 4.3—Low Emitting Materials – Flooring Systems IEQ Credit 5—Regional Materials Sub-floor and Site Conditions: Recommended Sub-floors Concrete above, on or below grade APA rated plywood underlayment Properly prepared gypsum cement Sub-floors on and below grade must be protected from ground moisture with a functioning and intact Class A vapor retarder that conforms to the requirements of the most current version of ASTM E-1745. This vapor retarder must be directly beneath, and in contact with, the slab. Concrete sub-floors must be properly prepared according to the practices detailed in the latest standard, ASTM F-710. Gypsum sub-floors must meet the requirements of the most current version of ASTM F-2419. All curing agents [topical and admix], adhesives, paints, varnishes, oils, waxes, dust, dirt and any other bond inhibiting substances must be removed. The removal of bond inhibiting substances must be by mechanical means: sanding, shot or bead blasting. AAT-320 cannot be used if adhesive removers, solvent or chemical cleaners have been used. 2 The maximum moisture emission rate of the sub-floor cannot exceed 8lbs/1000 sq.ft./24 hours [ASTM F-1869], with a pH of 7.0- 9.0 [ASTM F-710], and a maximum in situ RH of 90% [ASTM F-2170] for carpet tile. The maximum moisture emission rate of the sub-floor cannot exceed 6lbs/1000 sq.ft./24 hours, with a pH of 7.0-9.0, and a maximum in situ RH of 80% for vinyl tile and approved carpet cushion. Prior to the application of AAT-320, sub-floors must be tested in strict accordance to the most recent versions of ASTM F-1869 and F-2170. Both testing protocols must be performed in order to provide the most accurate view of the sub-floor’s condition. Sub-floors of lightweight concrete must be tested in strict accordance to the most recent version of ASTM F-2170. The placement of calcium chloride kits and humidity probes must follow the ASTM standards for proper locations and the correct quantity of test sites. These and other tests may be performed by AAT in the event of a warranty claim. All sub-floors must be flat and structurally sound. Smooth or glazed surfaces must be abraded. Repair all joints and cracks with latex-based portland cement underlayments. Never sand existing resilient flooring that could contain asbestos. Follow all Federal, State and Local regulations relating to the removal of in-place, asbestos containing material. Very porous sub-floors must be primed with AAT-570 Primer. NOTE: Strip or plank wood flooring, particleboard and OSB sub-floors should be covered with an approved underlayment (minimum thickness of ¼”). AAT-320 cannot be used if adhesive removers, solvent or chemical cleaners have been used. Before beginning installations with backing systems or over sub-floors not listed contact AAT’s Technical Services for recommendations. AAT Technical Services can be reached at 1(800)228-4583 or by email at techservice@aatglue.com . It is the sole responsibility of the applicator of this product to determine the suitability and compatibility of this product for their intended use. If the provided preparation and application instructions are not followed, DO NOT USE AAT-320. Installation Recommendations: Typical trowels and approximate coverage: (depth x width x spacing) Carpet tile: 1/32” x 1/16” x 1/32” U notch trowel – 180-250 sq. ft./gal. Vinyl Tile: Porous sub-floors – 1/16” x 1/16” x 1/16” ⊔ notch – 125-150 sq. ft./gal. and Non-porous sub-floors – 1/16” x 1/16” x 1/16” V notch – 180-200 sq. ft./gal. The building should be completely enclosed. All outside doors and windows should be properly installed with latching mechanisms in place. Adequate ventilation should be available. The HVAC system for the building should be operational and provide a consistent temperature of 65-85°F (air and sub-floor) and humidity levels should be between 40-65% for a minimum of 72 hours prior to the installation. These conditions must be maintained to ensure the long term success and performance of the installation. 1. Flooring and adhesive should be acclimated to the job site conditions for a minimum of 24 hours prior to the installation. 2. Be familiar with the recommendations and any special instructions from the flooring manufacturer before beginning the installation. Follow the flooring manufacturer’s specific recommendations regarding sub-floors. 3. Refer to the information above for specific information regarding sub-floor preparation and site conditions. Spread the adhesive with the appropriate trowel as defined above. Allow the appropriate dwell or open time. 4. When installing carpet tile and vinyl tile (LVT) spread the adhesive with the appropriate trowel and allow the adhesive to dry to a clear, tacky state. Place the carpet tile or LVT into the dry, pressure sensitive adhesive. When installing carpet tile AAT-320 has a working time of up to 24hours. For LVT installations only spread as much adhesive as can be covered with the flooring in under six hours.¹ When installing carpet tile AAT-320 can be applied with a roller, but caution must be exercised to maintain an adequate adhesive coverage. For most applications the spread rate should not exceed 350 sq. ft. /gal. 5. For use with carpet cushion, spread the adhesive with the appropriate trowel and allow it to develop tack. DO NOT allow the adhesive to “skin-over” or dry. Place the cushion into the “wet-tacky” adhesive while the adhesive is still wet enough to transfer to the back of the cushion. 6. Roll the installed flooring with the appropriate three-section roller. For carpet use a 50-75lb roller and for LVT use a 75-100lb roller. Rolling should take place immediately after the flooring is placed into the adhesive. 7. It is recommended to minimize traffic over the newly installed flooring for at least 24 hours after the installation has been completed. Do not wash or clean the floor for five days after completion of the installation. To replace furniture and appliances use plywood panels to protect the flooring. 3 Specific Technical Data: A. Base: Acrylic-Ester Emulsion B. Color: White C. Clean-up: Remove wet adhesive with water and mild soap solution. Use AAT-197 Adhesive Remover to remove dried adhesive. Dried adhesive may be more difficult to remove; therefore, take care to remove adhesive from the surface of the flooring before it dries. DO NOT apply the solvent directly to the flooring material. D. Packaging: 4 gallon pails and one gallon pails (4 per case) E. Shelf-Life: One year from date of manufacture in un-opened container when stored at 70°F. F. Freeze-Thaw Stable to 15°F. Stability and spread-ability can be affected if allowed to freeze. Frozen material should be allowed to thaw at room temperature. DO NOT agitate or stir while frozen. G. VOCs: 0 g/l (Calculated per Ca. Rule 1168) H. Not recommended for exterior installations. NOTE: We recommend installers follow the guidelines set forth in the latest version of the CRI’s Carpet Installation Standard - 104. Before placing the carpet, the adhesive must be allowed an open or dwell time appropriate for the carpet backing, jobsite and sub-floor conditions. It is extremely important to maintain recommended notch depth, width and spacing. The proper notch depth is that which will produce adhesive ridges that affect a 100% transfer to both the substrate and the carpet backing to include the inner recesses of the texture of the back. 1 AAT-320 has an extended working time up to 24 hours after the initial drying for carpet tile and 6 hours for vinyl tile if the area is kept dust free.


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