Aquarium Silicone Sealant Black 3 Ounces

I wanted to use this silicone sealant on my vintage metal framed fish tank. Easy to use and work with. Once cured there have been no leaks.

I use this seasonally for a bit of an unconventional use: sealing the lid on my biological pond filter to make sure it stays completely airtight. I have a homebrew system made out of a five-gallon bucket with a solar-powered 12v pump inside that pipes the water out to a waterfall cascade. Water is drawn into the bucket purely because of the suction this creates inside the hard, rigid walls of the bucket, so for this to work that means the bucket has to be perfectly airtight. The silicone aquarium sealant works -perfectly- for this. I put a small bead around the edge of the screw-on lid (the kind they make for storing grain and pantry goods in such buckets) and when I engage the pump it pulls the sealant slightly down into the threads good and tight. The key is to only screw the lid on until it is barely tight, not very tight. When I want to open up the filter, I simply pull off the sealant from the edges, unscrew the lid, and apply it again when I am ready to close it. It does mean I go through a fair amount of sealant on a yearly basis but it's 100% pure peace of mind knowing that it'll keep our little family pond clean and easy to maintain without having to shell out the many hundreds of dollars for fancy canisters with specialized pumps and filters. One thing to note is that you -do- want gloves on to apply this, but it's not a completely loss if you get some on your skin. This sealant does not burn. I found out to my dismay that the pet store sealant BURNS if you accidentally get some on your skin. This stuff is just a pain to wash off. It is actually easier to get off skin if you let it dry and peel it off afterwards. I have -not- found a way to get it out of my clothing at all once it dries, so don't get it on clothes! My only qualm with this particular sealant is that the price does seem to fluctuate quite a bit. Sometimes getting the three-packs from other listings on Amazon is a better price overall. Still, very much recommended!

It's great glue. I used it to stick the hole under the water tank.

Bought this to try and repair a crack on our outdoor pond. Applied to a crack about 3” long. Followed the instructions and waited 48 hours before refilling it. The product worked perfectly.

Works very well. Not a fan of the price.

this works just fine exactly like it should. People crack me up if they're having issues it's user error lol. use tape for straight lines remove the tape as you go so it doesn't harden and make sure that everything is super crazy clean before you start. Go online search you a few YouTube videos that show you how to reseal an aquarium tank. also please note not everybody is good at everything so if you're not the type of person with a sturdy hand and a feel for how much you are or are not pushing the silicone down with your finger or if you are not detailed enough to see if you got the tank clean you may not be awesome at this job and that's OK but don't blame the product.

Typical aquarium silicone. Easy to use. Seals and dries quickly. Used to seal a hummingbird feeder and it worked great. Easy clean-up.

Very intimidating at first. Used to seal a tank and worked perfectly. ( wait for it to dry before cleaning up excess product) comes off easier after dry it will make a mess if you try to clean it up while still wet.

Black good for hydro. Easy to work with must work fast. Used it to seal leaky uniseals on a bucket system. Reusable when cap filled with silicone is stored in alcohol. Tape bottom of tube with duct tape before use to avoid a blowout. Can buy from store but for 7 dollars to get anywhere and back in Toronto, it's worth it to get delivered and pay a little more

Shipping was quick but I have to say, no not something I will buy again. It is thick and not easy to get out of the tube, not what I expected. Tube split at the bottom and it made a horrible mess. I had gloves on but this was not what I had hoped for. I may now have an expensive terrarium that is not water tight. Very disappointed. Moving forward I will get a tube of silicone that requires a caulking gun.

Excellent...just make sure to use tape if you want straight lines..10/10

Does its job; sealed my aquarium leak and holds perfectly well. Some air bubbles in the applied area which had me worried but, disappeared in couple days. I just wish there’s a clear colour available rather than black.

Sealed my new tank perfectly. Bigger amount than I expected, only used 1/4 of the tube to re-seel my 49 gal. Tank