I've been using this stuff for many years, mostly to patch pool cover water bags that crows keep puncturing during the winter. The patches Never peel off, even after spending years outdoors in heat, cold, ice and snow.
I was amazed that it worked UNDERWATER! I did not want to drain my pool to fix a small hole on the bottom. So I found this product! You apply the glue to the patch and fold it in half. Once your underwater at the hole you unfold the patch and put it on the hole! That simple!