AQUEON All Glass Aquarium Silicone Sealant, 3-Ounce

100-Percent 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 aquariums use clear and Black Seal aquariums use Black sealant.