Bostik Marine is a clear, one-part acetoxy-curing high quality silicone sealant that provides a permanent flexible, durable, watertight seal for building of fish tanks and aquariums. The sealant is extremely resistant to UV, weathering, ageing and water, and offers excellent chemical resistance and is unaffected by alcohols, dilute acids and alkalis, soap and household detergents. The sealant remains flexible over a wide range of temperatures from -40°C to 100°C. It also performs as an excellent adhesive on non-porous surfaces where an elastic gap-filling bond is required. It has a non-sag rheology and can be applied to vertical surfaces. Bostik Marine does not contain a fungicide which may be harmful to aquarium fish.