I know it’s not perfect but my fabric was sagging in some spots along the doors due to a previous water leak from previous owners

used this glue , put a little hole in the fabric and spray some glue all up in there

then I used tacs to hold fabric up for a day.
it’s not the best job but at least now the fabric ain’t bouncing around in the wind

 

It will fail within weeks. I've used the exact same glue. Every headliner glue will fail because other issue isn't glue failure.
The issue is that the insulation on the headline starts to deteriorate and the glue is on the insulation, the insulation will continue to degrade and the headliner will sag again.
The only real fix is to remove all the insulation on the headliner.
Gluing will give you some time, but once the insulation starts to fail, it will begin to fail everywhere.

 

come on man I don’t wanna hear that

 

@redwhitekat upholstery screw "buttons" work great to stop sag. Most sewing shop have them

 

good stuff. I put enough glue they whole think better stick

if not I will give this a try. Mine is not bad at all

 

Also, putting glue up there just makes for more of a hassle when you do come to try and strip the fibreglas shell for a full replacement.

 

Yeah, Xanthro is correct. It's not the adhesive that fails and causes the fabric to sag. The open-cell foam between the fabric and the fiberglass shell deteriorates chemically over time.

When you've had enough with the sagging, take out the headliner, strip it using denatured alcohol to remove the adhesive residue, prime it with KILZ, and then PAINT it with a good quality exterior latex paint. It's a tedious job, but not difficult.

 

Agreed on all fronts, its not really that big of a job to pull it down and replace it. Take 3-4 hours the first time moving slowly. Two cans of adhesive $30 and $50 of fabric, make sure you get the extra wide, 54" stuff. Use Stripeze and a wire brush to scrub off the old liner. pretty easy job.

 

yes agree with all thats said, I tried the glue through the hole trick Iit lasted a month or so, as it was t,he seals on

my sunroofs were shot so I ended up taking out the headlier fixing and resealing the sunroofs recovering the headlner , and I happy with the result
I could not just paint mine as it had some damage , so it had to be covered to hide the repairs

 

looks really nice