This is a 2-part epoxy product that is terrific for underwater applications. Don't let the epoxy part fool you though, it's not the typical epoxy like we're used to. This product is extremely pliable, and completely different to work with than what the usual epoxy products are that are on the market. This also solidifies and hardens much quicker than what regular 2-part epoxies. I would highly recommend trying some, I think you will be pleasantly surprised.