... If you could put a light vacuum on the bottom side when you use the epoxy it will pull the epoxy thru for a better bond.
Nice thinking...Maybe build a quick and cheap frame with plywood and 2x4's, then use a shop vac to pull the suction. The 5 or 15 minute epoxy is too gooy to pull into the typical crack but the stuff to repair windshield cracks is made for the job. I don't know about its strength though.
