Perfecto Silicone Aquarium Sealant

A 100 % clear silicone rubber sealant for repairing leaky aquariums, broken ornaments, and can be used to build small aquariums. Stays flexible. Will not crack or shrink. Waterproof. Harmless to fresh and saltwater fish. Note: Empty tank before using sealant. Sealant typically skins in 5 minutes, cures and bonds in 24 hours. Allow 48 hours before filling tank again--optimum strength is achieved in 7 days.