Headliner Glue

What model & year headliner are you working with?
Sounds like a modern design not found in our A-bodies. Foam/felt glued to a ridgid panel?
If this is the case you will need to purchase new headliner fabric
to glue to your cleaned original panel.
The foam pad and fabric are one piece when new and with age the foam deteriorated
allowing the fabric to fall. Fabric not reusable.