AcoustiGum Acoustical Ceiling Tile Adhesive - Henry Adhesives DIRECTIONS: Refer to acoustical tile manufacturer's specific recommendations. Condition the area to be installed, adhesive and ceiling tile at 65°F. (18°C) or above for 48 hours before, during and 48 hours after installation. Test painted surfaces to assure compatibility by adhering 3 or 4 tiles to painted surface. Wait 48..