ROCKAL Adhesive 85-20 is a high tack, rapid setting water-base adhesive designed for bonding low density & high-density duct liner, duct wrap and fibrous glass insulations to painted or unpainted steel, galvanized or aluminum surfaces. ROCKAL Adhesive is a solvent free, very low VOC synthetic elastomer emulsion. It is non-flammable when wet and fire-resistive when dry. It can be applied to either the metal or the insulation. ROCKAL Adhesive is ideal for bonding fibrous glass insulation to concrete, block and other masonry surfaces in building construction.
Insulation Attachment: The metal surface shall be coated by brush with ROCKAL® Adhesive 85-20 at a coverage of 200 sq. ft./gal. (9 m2/l). Allow an open time of 0 to 15 minutes to develop full tack. Install insulation, apply pressure to assure complete and uniform contact to the metal surface. The above application suggestions do not preclude the use of additional mechanical fastening as recommended by insulation manufacturer or required by design engineer.
Lap, Butt Strip & Pin Patch Sealing: All longitudinal and butt joint laps of facing shall overlap a minimum of two inches (5 cm). Apply a brush coat of Foster ROCKAL Adhesive at the rate of 75 sq. ft./gal. (1.8 m2/l). Allow an open time of 2 to 10 minutes to develop full tack. Alternate - Apply a brush coat of Foster ROCKAL Adhesive at the rate of 150 sq. ft./ gal. (3.7 m2/l) to each surface. Allow an open time of 2 to 10 minutes to become tacky.
ROCKAL® Adhesive 85-20 Standards:
Limitations: Store and apply between 40ºF (4ºC) and 100ºF (38ºC). Always test plastic and painted materials for compatibility when using a solvent base product. Do not use with flexible PVC. make certain this product is completely dry and the area free from solvent odor if food is involved.
Dilution: Up to 1:1 with water
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