Howdy, I have done extensive delam. repair by peeling up the filon and replacing the luan with lexan plexi glass at the same thickness, with many small holes in it to enhance the bonding. Always used Gorilla glue (which I believe is water proof once cured) I contacted gorilla and described my repair. They said the glue will likely last longer then the substrate. So far (3 yrs) all ok. Like many have said, it must be clamped securely or will bulge out from the glue swell. Suggest expanding cargo bar or even expanding shower curtain rod against a building or strong fence post. Also consider some type of polyolefin based release film under the foot of the clamping bar "foot" so it will not stick to the repair. Nothing sticks to polyethelene or polypropylene.