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Herb G.

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1 Review by Herb

Flex Seal

  • Flex Seal

“Ineffective”
10/6/23

I used Flex Seal Liquid over waterproofing cement, 3 coats over two days, min 8 hours between coats, allowed to cure for one week to waterproof my small pond. About two months later, I drained the pond to repair the pump to find that the Flex Seal had failed. It had blistered and was peeling. Seems unsuitable for waterproofing application when submerged under water. Advertising led me to believe otherwise.

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