Roberts 2057-0 Adheres Composition & Vinyl-Asphalt Structurally Sound Plywood of Underlayment Quality Tile Glue, 1 Quart For adhering vinyl composition tile (excluding self-stick), including tile-over-tile installation Bonds with concrete, APA rated plywood, one layer of existing and finish free VCT, aged cutback adhesive residue, primed gypcrete (refer to ASTM F2419) and terrazzo Ideal for direct bond and double bond installation Moisture Control Adhesive - up to 8 lbs. MVER and 85% RH Thin-spread adhesive dries clear in up to 24 hours with the restriction of foot traffic and moving heavy objects