DAP 00688 Dow Corning Silicone Rubber Aquarium Sealant

My indoor pond had a leak just as my new little guys were about to arrive. I ordered this online and received within a couple of days. I placed a thick ribbon inside and outside of my indoor pond where the leak was and waited until it cured. Once it cured and there was no smell, it became a strong rubber polymer that was secure and leak proof. I filled the pond with water and it's absolutely perfect. Little guys arrived the day I filled the pond. No leaks! It's perfect. No effect on fish. The initial smell is strong; so, if you're using it for live creatures, like I did, definitely wait until it has completely cured because it will kill them in its wet form. Wait until it has cured! I highly recommend this! I would absolutely buy it again if I ever need it!