All Glass Silicone Gel seals the aquarium airtight, preventing
any leakage problems. Choose fromClear or Black silicone gel. This
strong, waterproof silicone, used to manufacture
new aquariums, is now available for home use. This easy to use
silicone gel tube has a twist-on nozzle for easy application and
provides a long-lasting bond. It is permanently flexible and does
not crack or shrink. It is non-toxic and safe for use on
fresh or saltwater aquariums. Sealant cures in five minutes
and fully bonds within 24 hours.