Kraken Bond Black Aquarium Silicone Sealant - (2x10.1 fl. oz.) 100% Waterproof Aquarium Safe Silicone, Non-Toxic Fish Tank Safe Sealant, Fast Curing and Strong Adhesion, 2 Pack

I’ve been using different types of silicone for decades as a plumber, and this is honestly the nicest silicone I’ve worked with. It flows smoothly, tools incredibly well, and leaves a very clean, professional-looking bead with minimal effort. I used it to waterproof an entire large reptile enclosure, including all of the interior seams, and it made the job much easier than I expected. One feature I really appreciate is that every tube comes with a removable tip and sealing cap. It makes saving and reusing a partially used tube simple, which helps reduce waste and saves money. If it proves to be as durable as it was easy to work with, it’ll become my go-to black silicone. Highly recommended.

Strong and smooth. Easy to use and does the job it was designed for.

It was my first time using on a fish tank it worked great and no leaks

Excellent product, Great adhesion, no more leakage good value and would purchase again

I use this aquarium silicone to after I spray the foam. After I apply the silicone on top of the spray foam, I press in cocoa coir for the back round of my paladarium. This stuff is super messy and sticky so make sure to use gloves and a mask too, it stinks. Make sure you have a caulk gun too, apparently that is common sense. It comes out very fast once you hit the trigger so be prepared. It does the job well and I have had no leakage issues.

It works

Works great and dries quickly just don’t breathe while it’s wet

Does the job!