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 ...

To seal air leaks, you first need to identify them ... clear or paintable caulk, liquid spray foam (expanding foam), weatherstripping, foam gaskets for sockets and light switches, a utility ...

Flex Seal is a line of sealant and adhesive products that create a “watertight, flexible rubberized coating that stops leaks ...