If the headlining on the car has only sagged partially for example around the edges you could use glue to re attach it.
Roof lining repair glue.
Dip the brush into the glue and paint it onto the roof.
Pour some contact cement inside a small container.
Pull the liner tight against the roof.
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Gluing the headlining back in place.
The best method for evenly.
Use the clamps to hold the liner in place as it dries.
Here s a couple of hacks you can try to stop your roof lining from sagging.
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The ultimate how to guide to fixing a sagging car rooflining by reece s auto headlining repairs.
Press the roof liner against the glue until it sticks.
It s best to use specialist headlining adhesive in a spray can to ensure that the glue is distributed evenly.
If the material of your liner is sagging partially especially on the edges you can use a tube of glue to fix it in its place.
3 sand back whatever is left over thinking of using a sander 4 glue the cardboard and place the material over and ensure it is straight.
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Start from the back of the car.
1 get the roof lining out.
The simplest way to repair that detached fabric is to simply find a way to reattach it.
5 keep it down stiff till it is dried and then trim it back.
Work in small sections.
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If small patches of the liner have simply peeled loose this is the easiest fix.
Use a roof lining adhesive that is made especially for gluing these fabrics.
Don t use the ordinary glue as it cannot fix a headliner.