Our 100% silicone aquarium sealant is easy to apply and waterproof to stop leaks.  The high strength silicone creates a permanent seal that will not crack or shrink and is non-toxic making it perfect for use on all aquariums.  For standard...

Seachem's Aquarium Sealant is a 100% RTV Silicone for sealing and repairing aquariums. It is formulated to provide excellent adhesion and tensile strength with permanent flexibility. It is safe for aquatic life in both freshwater and saltwater.