King british aquarium sealant is a silicone dealant ideal for aquaria building mounting valves and sealing connectionsr it gives a permanently flexible watertight seal and excellent adhesion even under extreme pressurer suggested usesr this aquarium silicone can be used for constructing aquaria and fish tanks in glass with or without metal frames it is ideal for repairing existing aquaria where non silicone materials have broken down or failed and can also be used for applying fixtures ins