I tried using it to seal a crack in a copper pipe that distributes water to a spout on the outside of my house, and it didn't help at all. Although the plumber's tape I'd tried prior did not work either, which lead me to try the Flex Tape, it still seemed to work better and was half the price of Flex Tape. Not pleased at all.
Bottom Line: No, I would not recommend this to a friend
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