Kraken Bond 100% Silicone Aquarium Safe Sealant - Waterproof Bond to Glass, Non-Toxic Aquarium Sealer Clear for Freshwater & Saltwater Aquarium | 12 Pack, 10.1 Fl. Oz. Cartridge

Works really well. I re-sealed a 175 gallon tank and it has held up well with no issue. Definitely get a caulking corner tool. They are very cheap and work really well. As of now, I will buy this silicone again. Make sure you get more than you think. I've screwed up before, and ended up running out of silicone a foot short. No worse feeling than scraping brand new silicone for hours.

This is the second type of silicone I have purchased from Amazon, and this stuff actually adheres to glass! The other stuff I bought would peel off, and did an awful job while smelling rancid. This stuff doesn’t smell great, mind you, but it is very mild in comparison.

I haven’t added water yet because it’s been less than 24 hours since I applied the silicone to adhere my 3-D background that I created. I noticed on the back of the tube it says to wait 21 days before it is safe to use. I called Kraken customer service and they said it is a typo and it is safe to use after 24 hours. I will be adding water later today or tomorrow.

Bought pretty close to the cheapest bottle I saw without expecting too much. Pleasantly surprised by a good product with good adhesion and spread. Overall it won't beat the best of brands, but easily just as good as the mid tier brands.

Product sealed my fish tank quite well. Follow Instructions and it should work fine. And was a quality product for the money.

Used it to reseal my 125 gallon tank. Strong smell, very strong..... Bet eeeh it gets the job done

The bottom of my tank broke so I got this, follow the instructions and many a video I found online to do it properly waited a week for curing and less than 2 weeks later the seal is leaking and I have to take apart my whole tank again. I'm pissed

It's thick & easy to spread. Wear throw away gloves. Strong vinegar smell. Ideal for revealing fish tanks.