Join Date: Jul 2007
Location: New Zealand
You're right, it's not the glue that fails, it's the foam that disintegrates, and trying to re-glue it never works! You can get new foam-backed headlining material from a trimming/upholstery shop. You do have to scrape all the old foam off (it crumbles off easily) and then use contact adhesive to secure the new material, taking suitable care to get it on straight as you only get one shot. Either use the 3M spray adhesive (other spray adhesives are often too weak), or use Ados F3 (rather than F2) but expect to spend quite a while spreading it out - in the open air rather than a garage!
'00 GTV V6, '08 FIAT 500, shell and parts for a '71 FIAT 850 Coupe