Flex Seal Liquid is liquid rubber in a can that you can brush roll dip or pour. Flex Seal Liquid starts out as a thick liquid and dries to a strong flexible watertight rubberized coating. Seals out air water and moisture and its mildew chemical and UV resistant. Non hazardous non flammable and safe around plants and animals. Also works on copper tile wires aluminum and foam and safe to use on EIFS TPO PVC EPDM CSPE Hypalon and polyurethanes. 32 oz. Gray.