Last year I replaced the headlining on my old car. It's a foam backed nylon material which is glued to a fibre former. The instructions were to use spray on contact adhesive which I got from the same trim suppliers. And it's failed in several places - mostly where it's most under the highest tension, like the dimples behind the grab handles.
I'm wondering if the moisture content in the fibreboard was too high - I did have it indoors for a couple of days before doing the job but perhaps it needed longer?
Anyway - I'm going to do it again. The material isn't too expensive. So what should I use to give a better grip to the fibreboard? Soak it in a PVA solution? Anything else?