Surface Prep and Glue Adhesion
From contributor A:
I suspect your glue was frozen. Any glue should hold the plywood to wood after 24 hours. Titebond I yellow glue would work fine for your application or any glue for that matter.
From contributor H:
I'd bet your contact surface between the plywood and face frame wasn't as good as it should have been. Yellow glue doesn't have very good gap filling properties. Use a caul board and bar clamp. With the right mating surface and a little warmer weather, ten minutes clamp time is enough.
From Gene Wengert, forum technical advisor:
As posted already, the problem is that the two surfaces you are gluing are not ready for gluing. There may be gaps due to surface roughness or gaps due to non-uniform or inadequate pressure. It is well known that when manufacturing plywood, the heat creates a surface that is not easy to glue well. The surface fibers are inactivated, technically. Try light sanding on the plywood prior to gluing to create a smooth and a new surface. Next, examine the face frame for the same issues of inactivity. A very light sanding should restore glue-ability. There is nothing wrong with the adhesive you are using.
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