Silicone 3 oz.

not useful, it is the same material used in other silicon sealants. not worth to buy. go for cheap one.

Me ayudó con la fuga de la fuente de agua de mi mínima

This is a great product. I sealed a 110 gallon tank with no problems. The one thing I disliked was it was really difficult to squeeze it out using a caulking gun.

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!

Great Product. My main tank cracked half way down and I needed a temporary solution to keep my fish alive whilst waiting for my new tank. I applied the solution onto the crack and it was able to significantly stop the water leaking.

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