I bought this tape to fix very small holes in my vinyl pool. Cleaned the surfaces as directed and applied the tape with the pool empty. Filled it 1/4 full - leaking instantly. I actually assumed I hade done it wrong so I fell back on their claims that the tape will seal an active leak. That was totally untrue. This tape is super sticky until it hits the water and then it is NOT sticky at all and will not adhere to anything. My kids will now wait to swim while I find a better product.
Pros and Cons:
Bottom Line: No, I would not recommend this to a friend