Pool Putty for Leaks Underwater 17.6 Oz, 2 Part Epoxy Putty Set, Fix Leaks Cracks Underwater or Above, for Tile, Concrete, Fiberglass, Cement and Other Surfaces (YCNZT1-01)

Excellent value. Easy to use and apply, and works really well. Patched a couple of cracks on my pool (one of which is below the water line), stopped the leaking, and has held up since the repair 5 months ago.

I used it to patch some diamond-bright that came loose inside my pool. I applied it directly underwater. It hardened within a few hours. Dries white. I wish I could find one that dries light blue but white looks fine.I would definitely buy it again for an underwater seal or patch.

First used this today. I will have to see how it sets after 24 hours. It was difficult to knead. I twisted the two parts into a rope and pulled smallish balls of putty off and then kneaded each. I combined each ball of putty with another and kneaded that. I kept repeating this until the putty was one color throughout. I then placed the putty on the pool in smallish ropes and pressed the ropes down. Hopefully the putty patches will dry quickly. The product looks like a good value for the money and it is definitely like it is a good quality. The durability looks good, but time will tell. I don’t expect any leakage.

the stuff seemed to work correctly. one area the 2"by 5" peeled off within one day. another area twice as large worked well and is still there. both areas were under water so this was probably operator error.i have ordered an ever larger size amount to fill in some more areas.

So easy to use works great

It didn't work under water. I tried several times to get it to adhere to my swimming pools wall but it would not stay on.

Slowed the leak. Did not stop the leak. Might have been operator error.

Very easy to mix and cover pool cracks and gaps. Hard as a rock and seems easy to paint for a proper color match