Bostik's BEST Wood Flooring Adhesive 5 Gallon BOSTIKS BEST wood floor adhesive is a one-part, trowel applied, tacking,moisture-cure urethane adhesive; this advanced scientifically formulated adhesive does NOT contain any water. Once cured, Bostiks 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. Bostiks Best elastomeric characteristics allow the adhesive to move with the wood as it expands and contracts. BOSTIKS BEST wood floor adhesive 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. BOSTIKS BEST wood floor adhesive may be used over all properly prepared substrates common to hardwood flooring installations including: concrete, plywood, particle or chip board (underlayment grade), well bonded vinyl and ceramic tile, cement backer board, gypsum patch/underlayments (dry, above-grade), cement patch/underlayments, radiant-heat flooring, and terrazzo. 5Gallon Size