Underwater MagicUnderwater Magic Leakage Preventor, White

An excellent product for sealing cracks in your pool, and also excellent for helping seal leaks on your filtration system, including the pressure side of your components. Works beautifully on wet surfaces and sets to caulk consistentcy so you can remove nuts and sealed components later. Expensive but you get what you pay for and a little goes a long way. Definite purchase recommend; I will purchase more when current tune has been used up.

This product works as advertised. I sealed a leaking pool light without having to drain the pool. Although very expensive it saved me from having to drain my pool during a drought so it was worth it to me.

I used this at the deep end of my pool to seal a crack in the plaster that was leaking water. I had to use my SCUBA gear in order to so this. Just needed a temporary patch until I can get the plaster redone next year. In the end, this worked OK, but is was almost impossible to use under water. The caulk would not stick to the plaster very well and would always just clump onto my finger as I tried to smooth it into the crack. I was about to give up when I tried smoothing it out with a tee shirt I had brought in the water with me. Using the tee shirt material to smooth the caulk onto the plaster for some reason worked quite well. It allowed me to push the caulk onto the paster without it coming off like it did when I used my finger. So very difficult to use under water, but did fine using the tee shirt trick.

Works great

I had a leak in my pool due to a crack that had formed, starting at my light and continuing down to the bottom of my pool. It propagated about 3 ft in length over the past year, and it is about 1/8" wide. I searched for a caulk that could be applied under water and found "Underwater Magic." This stuff fixed the leak. I was hoping to work it into the crack and wipe away the excess, but it is so sticky that it can't really be wiped away under water. If you are working with it out of the water, you might be able to clean it up with a solvent. I was careful not to make the bead of caulk too wide, and it looks fine. The best part is it fixed the leak. It is expensive for a tube of caulk, but it saved me a lot of money in pool repair (or at least postponed it).

So far so good. A little messy if you're applying in deeper applications but rubber gloves helped. The only reason that I didn't give a 5 is that it's white. Clear would've been nice

I bought this item to caulk around the edge of a pool skimmer which was underwater. It comes in a plasticized container that does NOT work well with a typical caulk gun because the bottom of the container does not move well against the sides of the cylinder. The material is NOT like caulk - it is like incredibly adherent, sticky glop that gets all over everything - the surface you are working with, your hands , the caulk gun - everything.I spent as much time cleaning up the mess and my hands as I did doing the caulking job!!!

I used this tube to adhere about ten feet of tile to my 40 year old pool. I didn't want to drain it below the tile line and this product worked very well. The tiles stuck fast and dried solid. I then used a waterproof grout to finish the job.