[Ace in the hole]

No doubt some of them fail. I thought long and hard before doing it to my tank. A lot will depend on how clean and well prepared a surface you have to begin with as to how well it will stick. Time will tell just how well the stuff I used works, so far so good but it has only been a few months. I am going to wait and reserve final judgement till after a few years but for now it seems to be working great.