Clear Underwater Sealant 2.53 Fl Oz or 75ml, Clear Gold Label Koi Pond and Aquarium Sealant Bonds and Seals Leaks Underwater

Our Koi pond liner developed a leak (thank you Mr Racoon that fell in and had a hard time getting out). We got it all patched, and is holding well. The first try didn't work so well but that was because we were trying to use the wrong material to patch with. Once we figured it out, it was perfect and the fishies were happy.

Great adhesion and easy to use. I was able to seal a leaking fountain wit this product

I got the clear stuff to fix a slight leak in my 55 galllon glass fish tank seam. It worked great to stop the leak but it cured a cloudy/white, making for an unexpected ugly seam. If not for the cure color I'd give it 5 star. Suggest if you get this stuff you buy the black. It would probably be less noticable.

We have a tiny leak in our 125 gallon tank and will eventually have to buy a new one. Cannot afford that right now though This product has sealed the drip and did so much better than just using regular tank acrylic sealant. Quite satisfied with it.

Doesnt set as good underwater. Takes days to cure and tank was still leaking. I did use this as a method to fix an indoor tank rather than outdoor pond. Just bought a new tank

This is the same line of products as the black pond sealant by the same seller, and I have bought and tried both unfortunately. I buy a lot of stuff on Amazon, but this is actually the first time I am leaving a review, because this product is that bad! Please do not purchase it, it is a complete waste of money and it does not work. This product works almost the same as the $9 silicon sealants sold at Home Depot, and trust me, with a sizable pond, this little amount of sealant will not kill your fish. This product is also very expansive because it claims that it works under water. It does not! There is no way you can get it to work underwater, trust me, try it if you don't believe it. So I ended up draining the huge pond anyways, and applied this product. But it does not work. Pond still leaks a lot of water. This thing probably can't stand the UV rays from direct sun light anyways, and looks like it will degrade give it time even if it stopped the leaks. So if you have a "mason/concrete/plaster" pond like me, good luck. Your best bet is to change it completely into a liner finish (rubber) base, or find a swimming pool company to do it properly and spend the extra money, because they do it properly with thick concrete and big foundation like a regular pool. Otherwise the pond will crack with time, and this product will not help you! Simply DOES NOT WORK!

Does the job! Used for a pond and fairly easy to work with.

This is the best. I used the product to fix a leak in my liner pond. Easy instructions and easy to use. Not a whole lot of prep work to be done. One of the best products on the market.