BOSTIK’S BEST is a one-part, trowel applied, tacking, moisture-cure urethane adhesive; this advanced scientifically formulated adhesive does NOT contain any water. Once cured, Bostik’s Best is waterproof and is not adversely affected by exposure to moisture or water; its superior properties provide a tough, flexible, tenacious bond to a variety of surfaces. Bostik’s Best elastomeric characteristics allow the adhesive to move with the wood as it expands and contracts over the life of the floor. This product contains Bostik's BLOCKADE™ antimicrobial protection, which inhibits the growth of bacteria, mold, or mildew on the surface of the dried adhesive; the dried adhesive resists stains caused by mold.BOSTIK’S BEST may be used to adhere all engineered, acrylic impregnated, solid plank-flat milled, shorts, bamboo, cork, and parquet hardwood flooring designed and recommended in writing by the hardwood flooring manufacturer for glue-down applications. This adhesive can also be used to install plywood as described, as well as, ceramic tile, marble, and stone inlays for light commercial and/or residential applications.