We have only used GE II as suggested in the terrarium build guides on this forum, and some aquarium-safe silicone when possible (available in pet shops). As Don said, the frogs must be removed from the enclosure.

The silicone cures in about 24 hours, but I would personally keep the frogs out for a longer time. When we built our vents terrarium, we waited close to 2 weeks before introducing the frogs in.