Henry 237 AcoustiGum 4 Gal. Acoustical Ceiling Tile Adhesive is a latex-based adhesive designed for installation of acoustical ceiling tile. It is also handy for installing wall paneling, drywall, particle board, moldings and FRP panels. This adhesive has a fast initial grab. Open time is 30 minutes. Bonds to concrete, concrete block, gypsum drywall, plaster and brick on all grade levels as recommended by the acoustical tile manufacturer. Glossy painted surfaces must be abraded. Henry 237 is a low odor and non-flammable product. The solvent free adhesive ensures a strong bond. There is no bleed through onto the tiles. For Cleanup simply use a wet soapy cloth.