Underwater Magic Sealant, 290ml/9.8oz Tube, White

Best sealant. Very easy to install. Well worth the price. Fixed our pool leak.

I used this to reattach a drain cover that the screws stripped out. It has been about a month and it's is still holding strong 💪

I have a decades old fiberglass pools with multiple leaks. The wall has a hairline crack. Easily plugged with this sealant, even under water. I also had multiple cracks in the skimmer. I had to use my finger to apply chunks of the sealant until all cracks were sealed. Now a year later, those seals are still holding up. This product is much better than all other submarine sealants or cements I have tried on Amazon. It really seals tight and lasts very long. There are two drawbacks. First, it is expensive. Second, it is very thick and very hard to push it out of the tube, even with a caulking gun. Once opened, you are most likely unable to use the remaining that is still in the tube. This is why I am only giving 4-star rating. I am ordering a new tube to work on a new leak and add new layers on old leaks.

Working great so far on sealing a pool step underwater.

Seals well..needs to cure before pressure in pipes

When I open the item, cut the top then placed it in the applicator, it would not budge much. I placed a screwdriver into the tube and found that the sealant had thickened. I cannot use it.

I checked out several products and read carefully the descriptions. I thought I had a product that could be applied underwater. It said it could be used to patch pool liners while the water was in it. I tried it on our floating dock plastic barrels, but it did not stick at all. I wonder if I could put downward pressure on sealant if it would have worked. I was trying to place it horizontally and couldn't get it to stick. It probably is a good product but just didn't work in my situation.

It really works!