Flex Seal "stops leaks fast and is the easy way to coat, seal and protect almost anything," the manufacturer says. In a promo video, pitchman Phil Swift applies Flex Seal to a screen door inserted in ...

Flex Crete Gray Concrete Joint & Crack Sealant is a single-component, pourable and self-leveling sealant that is less expensive than silicone. Fast curing, no tracking, easy application Meets ASTM ...