fwiw - i installed a new headliner with the spray adhesive provided (from msa) last winter and it's been great so far. i wound up w/a few wrinkles due to my poor skills, but they are not horrible - and they have not changed over the summer.

the key is prepping the underside of the roof (total pita to get all the old crud off) and using new foam, as the old stuff will keep tearing apart and just ain't gonna cut it.

hr369, I used 3M aerosol adhesive and so far no problems and the wrinkles smoothed out.

Now one of the reasons the headliner is staying put I'm sure is that it doesn't get the full heat from the sun anymore, that home made version of Lizard Skin I made up and applied to the interior of the car as well as the roof has made a big difference .

Chris