As seen on TV. Liquid rubber in a can! Stop leaks. Seals & protects. Covers easily. Excellent for: Roof leaks; gutters; skylights; windowsills; flashings; ductwork; foundations; awnings; chimneys; downspouts; vent pipes; A/C drip pans; RV's; campers; trailers; projects and so much more! Coat, seal & protect! Stop leaks fast! Flex Seal is an easy to use rubberized coating that sprays out as a thick liquid, seeps into cracks and holes and dries to watertight, flexible, rubberized coating. Flex Seal seals out air, water and moisture and helps prevent rust and corrosion. Once dry, Flex Seal can be painted. Flex Seal is the easy way to coat, seal, protect and stop leaks fast! CARB Coating Category: Flexible coating MAX 1.6 MIR.