Seachem Silicone Sealant is a top-of-the-line 100% RTV silicone sealant designed to seal and repair freshwater and saltwater aquariums. The formula creates a permanently flexible, watertight seal with a high tensile strength that won't crack, dissolve or shrink from the pressure or stress caused by the weight of water in your tank. The solution provides unmatched adhesion and sports a clear color. High quality silicone sealant 100% RTV silicone Suitable for freshwater and saltwater aquariums Won't crack, dissolve or shrink Provides a watertight seal The sealant is clear in color and comes in a 3 oz tube