Thanks/Danke Bob & AgX for the info. I'll have a closer look at these products. I'm looking into a different display method than the traditional mat & glass/metal frame. I prefer the look of photo's without glass over it. If that only lasts 2 years then that's ok. Time for new prints on the wall. :-) But it would be nice if I can separate the photo from the board and can keep/re-use whatever is still in good shape. I already found 3M's 568 PMA but that's a permanent adhesive.