I used Gorilla Glue. The larger the bottle the less per ounce. There's probably some generic you can buy by the gallon. Locally, I bought from Lowe's in 8 and 16 oz. bottles, ending up with $200 in glue.
To get the filon to glue down smoothly you'll need to built a couple of "O" clamps. I just used some scrap lumber I had, 1 x 4s seem to be strong enough. I used some scrap 5/8" particle board as a pressure plate and applied the pressure using Irwin hand clamps and the "O" clamp. I did the underside of the front cap with a scaffold/ladder that just happened to be the right height to use the hand clamps. You can use the "O" clamp, just make it large enough for the hand clamps to fit in.
These picture will give you an idea about how I did mine. Note that the palomino had aluminum side and floor framing and the front was wood framing.
Right front de-laminated:

De-laminated wood removed and dried. Still has a thin layer bonded to each side:

The hand clamps are putting pressure on the particle board until the adhesive cures:

Front cap:
I glued the front wall and a 1/8" thick piece of plywood, ~16" x 8 feet to the filon:

I attached another piece of plywood to the previous ply but not to the filon. Keeps it flexible:

Rolled the plywood under with glue:

Ready to glue and roll the filon under:

The plywood with the filon glued on is quite rigid:

The top edge has no plywood behind it. Rolled the 5 or 6 inches of filon down over the rubber roofing fastened using a layer of butyl tape on both top and bottom of the filon and the aluminum trim.

Finished product:
