GE Type 1 Silicone Doors and Windows (with no added mildew/mold blockers) or DAP aquarium silicone are the only ones that are generally accepted.
Whatever you choose, do not get any silicone that specifically says "do not use in aquariums" or includes any form of mildew/mold preventative.
75g FW Planted Community; 55g African Cichlid
29g Biocube SW Reef;12g AP Mantis Shrimp/Brittle Star
2 Cats, 2 Dogs, 5 Turtles