Gold Label Underwater Sealant, 290 ml, Black

I have ordered several of these, over the years, I like to keep one in, as I have a pond with a butyl liner, this stuff is brilliant, says what it does on the tube. It's got me out of a scrape, when rats have chewed my liner a few times. Speedy and safe in the water with fish. Easy to use ,but I would recommend gloves as it sticks really well.

This is brilliant stuff, almost like liquid liner. I fixed a hole in a liner by applying it thickly (e.g. 2 mm thick) to a patch piece of liner, placing the patch on the hole, pressing gently around the side of the patch (not in the middle, there needs to a thickness of goo) and hey presto, done. I also tried a test piece and can confirm that this stuff is _very_ difficult to remove.

I have purchased both the clear and the black. For some reason the clear seems not to be so good to use for wet places or under water. The black I found to be much better. Strange! I have used them to seal edges around the pond and as an adhesive in the pond. Does a decent job. Wouldn't get the clear again though.

Fabulous to work with, although my job was challenging to say the least, resealing pond to perimeter slabs, difficult with water in the pond although I dropped the level. Not tested it yet but if it still loses a bit of water over the too it won't be a fault of this product. Speedy delivery, fair price. Thank you. Judy, Bristol

We used this on the outside water feature which had cracks init worked great sealed the cracks and the leaks are gone would recommend

This product is amazing and I wish I discovered it sooner. My pond has always had a slow leak since I bought the property and it was already there and it was annoying, but I lived with it. However recently I was working by the side of the pond and dropped a saw which tore big jagged holes in the liner.... I was mortified and the level dropped by half within hours. After lots of research and not much luck and almost resided to the fact I was going to have a mammoth task ahead redoing the pond, I discovered this product. Skeptical but I tgought for the price, worth a shot. Amazing. Easy to apply, does exactly what it says on the tube and whilst I did it, I went around and covered a few tiny holes at top and pond is the fullest and best it's looked since I have moved in and staying full. For the large holes from the saw teeth, I bought a tiny pond liner from here, which was cheap and cut a small patch, like repairing a bike tyre and it's worked a treat. £20 spent in total and pond like new.

Disappointing results - does not stick if surfaces not completely dry. Drained pond for 2nd attempt and stuck patch carefully in accordance with instructions leaving good bead & not pressing flat. Patch stuck very well but minor leak through bead - stuck 2nd patch over top but still very minor leak.

As described except came without application nozzle. Annoyed I had to find one.

It did exactly what they said it would do, and it solved my problem I thought I could not fix

stuff is legit

Works well and cures underwater… fish in tank weren’t harmed. I recommend using latex gloves because if you get this on your finger it will be all over your body before you know it.. lol

It is too early to comment on how well this product fixes the leaks on my backyard pond as It is only 2 days post installation. I’m commenting now to help others as they consider this product who may be concerned about multiple reviews stating how messy this product is. This was a concern as I considered the pros and cons of the purchase. This product is no more or less messy than any type of adhesive caulking I have ever installed. Of course if you are not careful it can be a problem. Simply take your time to get the nozzle cut to the volume you want to apply and then run your bead accordingly. I found the info online adequate to understand how to prep and apply the product. If the product performs as specified I wil change the review to 5 stars.

The black stuff seems to be holding the rubber patch So i can give it a 5.