The Flex Paste commercial is everywhere, and it sure seems like a miracle product that can seal up just about anything, from a wine barrel gushing with water, to a boat constructed with chicken wire.

WICHITA, Kan. (KWCH) - There’s a good chance you’ve seen commercials for Flex Seal. The sealant comes with big promises. Its latest line is for flood protection, promising to keep water out of your ...