I can't find it now to save me, but somewhere I read that the 1/16" EZ Mount only had a one year warranty, whereas the thicker was pretty much guaranteed for the life of the stamp. Is the foam itself degrading, or has it just lost its "cling"? I know that a swipe with rubbing alcohol will restore stickiness to photopolymer (clear) stamps. I wonder if it would work with your foam? If not, I'd give the TIO&O a try on a couple of stamps and see what happens. If it works, then hooray for you! If not, you're no worse off than you are now, I'm thinkin'! It would be really helpful (to me, at least) if you could report back - I've been toying with the idea of adding some of this to my unmounted stamps, but will forgo it if this will be the result... Thanks and good luck!
Happy for no reason...