The waterproof adhesive for the plys, doesn't cover the exterior of the marine ply, so that layer is still vulnerable to water base products.
As it was epoxy was my first choice for the marine ply - the two work well together, but polyurethane adhesive along with polyester and vinyl-ester resins should also be usable.
Even though it has been recommended, I have not worked with tightbond, so I don't know how it do.
I have a greater preference to screws, than I do glue, as I just do not have a large supply of clamps.
Don't buy materials from a shop that uses it in production, find out where they buy it.
Near as I have been able to find out, they get their materials shipped in once a week from out of town suppliers - I did manage to contact one last week, and he said I would have to come pick up anything less than 15 sheets.
