Flex Seal Liquid is liquid rubber, in a can! Unlike traditional paints, Flex Seal Liquid starts out as a thick liquid, that can seep into cracks and holes to form a waterproof, weatherproof seal. Easy to use, just brush, roll dip or pour to stop leaks fast. Flex Seal Liquid can be used for a variety of coating and sealant applications. The most common uses for our Flex Seal Liquid are listed below: Common Flex Seal Liquid Applications Roof and gutter repairs Ponds and bird bath assembly and repairs Basements and foundations Tools and sporting equipment upgrades and repairs Cars, trucks and vans RV repairs Campers and trailers Boats and watersports equipment DIY projects, crafting, and hobbies Recommended surfaces Concrete Glass Brick Stucco Masonry Wood Copper Plastic Tile Fabrics Wires Vinyl Fiberglass Ceramic Porcelain Metal Aluminum Natural stones Foam Asphalt EIFS TPO PVC EPDM CSPE Hypalon polyurethanes+Features: Thick liquid that dries to a flexible watertight rubberized coating.Creates a flexible rubber barrier that blocks out air water and moisture.Non-Toxic Non-flammable no harmful vapors UV chemical and mildew resistSeals and protects from the elements and extreme temperatures.