GacoRoof 100% Silicone Roof Coating creates a seamless membrane to seal and repair existing roofs and permanently protect against leaks, permanent ponding water, and the damaging effects of severe weather. 1 to 12 Hr. cure time, dry to the touch. Bonds to asphalt, composite, concrete, fiberglass, metal, and most existing coatings on flat or sloped roofs. UV resistant.