What type of material they like both would would be good to replace the headliner with I want to use like cork board or something what could I keep it up to the roof with like a silicone or something more safe

 

3m spray adhesive, sprayed to both sides individually, let to tack up a minute, will bond to itself like mad. Get it right the first time there's no adjusting it.

I Need to redo my headliner because i swapped from grey to tan. When i do it, I'll use standard headliner material from any fabric store, start in the middle and spread it outward one direction at a time then trim the edges. Should work and be fairly cheap.

They make cork tile squares if you want to use that, should be easy to cut with razor after gluing each square.

 

Why cork board?

 

It doesn't make sense to me but his original post is pretty much unreadable.