Worked BEAUTIFULLY on a pin hole in an inflatable hot tub. Further, although I mostly deflated it, the hole was on a vertical wall and I didn't have to flip the hot tub on its side to allow the glue to sit flat. It cured within the listed 2 hrs and is basically now invisible. Please keep in mind that this is my first (and hopefully) only time I will have to use it but i will say I am very impressed so far. As well, I didn't have to use a patch, just the glue itself has solved the problem.