Epoxybond 2-Part Pool PuttyThe Epoxybond Pool Putty is a 2 part epoxy putty that is a hand moldable sealant designed to fix small leaks and cracks in concrete and gunite pool surfaces. No need to drain the pool, as this product can operate and harden underwater. Once the putty is placed properly and given enough time to cure, it will not shrink or fall off. Simply cut how much you need, mix them together, and press on the surface to fix the damages to your pool. Hand moldable