Former Navy SEAL Clint Emerson, author of "100 Deadly ... Following is a transcript of the video. If you take your hand and you go open and close, you can feel the muscles in your forearm contract.

I always keep some Flex Seal on hand and use it to fix leaky gutters, plumbing pipes and even my canoe. In recent years, with the increase in extreme weather and corresponding floods, Flex Seal ...