How do you reseal the fish aquarium?
Can you put silicone over existing silicone in aquarium?
What do they use to seal fish tanks?
For the best aquarium safe silicone, turn to Loctite Clear Silicone Waterproof Sealant. This formula can be used in saltwater as well as freshwater aquariums. It’s both flexible and gap filling, making it the perfect aquarium safe sealant for any tank with a capacity of up to 30 gallons.