Gold Label Underwater Sealant, 290 ml, Black

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.

I used it to fill a crack and a silver dollar-sized hole in a cement pond. I didn't have to remove the fish or empty the pond. The stuff is messy to use, but if you have experience using epoxy grout or clear calk, there won't be a problem. The pond holds water, and the fish didn't die. Success! I can't comment on using it on pond liners. however.

I bought this sealant to patch a hole in my koi pond liner. I attached the patch with the sealant, refilled the pond, and promptly had a leak. Upon a second disassembly, I noted the patch had failed completely. The product states it can be used under water, yet the label states it must cure 24 hrs. I ended up using another product, liner seam tape, to remedy my hole.

Great product worked in pond

It’s good and fast dry

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.

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

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.

A very good product and has worked to seal the holes in my pond, however anyone who suggests this can be used under water must have strange mystical powers enabling them to do so. I tried using it under an inch or two of water and the sealant just floated away like a sea slug. However, definitely works a dream on fully drained pond even if surface still damp.

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.