DAP 00764 9oz Gray AMP Concrete SealantDAP AMP Advanced Modified Polymer Self Leveling Concrete and Masonry Sealant provides a 100% weatherproof and waterproof seal with the ability to be applied on wet and damp surfaces. It has a fast 1 hour paint and rain ready time and meets ASTM C920, Class 25. For use on horizontal surfaces only, interior or exterior. 0 140 extreme temperature use Self leveling, no tools required Proven wet surface application Paint ready in 1 hour Water and rain