Review on 3M Marine Sealant 5200 - Black, 3 Ounces - Permanent Bonding and Sealing for Boats and Marine Applications by John Vann

Is there an above ground pool? Or any pool with a liner? BUY THIS! NOW! My brother had a big crack on the bottom of the pool. It crawled in all directions. I placed the BLOB on a disposable spatula and dipped. I hand it out like a three-year-old with icing on the cake. (Pool was already 9 years old, this was his last fight.) 4 YEARS! later, NOT - A - DROP! This thing heals underwater! There is nothing like it! We've used it on our boats since its inception, but the POOL? ! ! It saved us a thousand dollars! Warning. It hardens once opened, so don't plan on using the tube more than twice. Used once without a cap. The second time I pierced the hardened end and benefited. Until the third time? I had to pierce the wall of the tube and get out everything I could. But even if you only get one use, it's worth it.