Discussion
It probably depends if there is a foam layer left and whether it is attached to the headlining or the roof. If the foam is still firmly stuck to the roof and you need to reattach the headlining to that, then carpet adhesive is probably fine. If there is no foam layer or it is detached then you need to start from scratch.
When I replaced my headlining with perforated leather, which admittedly is heavier than most headlining and probably exacerbated the problem, I tried all sorts of glues for this.
Carpet adhesive lasted a week or so before it came down again. The high temperature trim adhesive from Woolies lasted better than most but with hot sun on the roof the headlining sagged again in a couple of months.
My final and permanent solution was a high grab "No more nails" type glue. Strange as it sounds it has done a great job and has now lasted for 9 months with no sign of detachment.
If you go down this route, for goodness sake dust sheet the car before applying the glue to the car roof! (not to the headlining) don't get it on your seats. Rake the adhesive with a fine comb as you would when laying tiles - you only want a very thin glue layer. Position the pre assembled headlining/foam carefully as it is very difficult to adjust once you start.
When I replaced my headlining with perforated leather, which admittedly is heavier than most headlining and probably exacerbated the problem, I tried all sorts of glues for this.
Carpet adhesive lasted a week or so before it came down again. The high temperature trim adhesive from Woolies lasted better than most but with hot sun on the roof the headlining sagged again in a couple of months.
My final and permanent solution was a high grab "No more nails" type glue. Strange as it sounds it has done a great job and has now lasted for 9 months with no sign of detachment.
If you go down this route, for goodness sake dust sheet the car before applying the glue to the car roof! (not to the headlining) don't get it on your seats. Rake the adhesive with a fine comb as you would when laying tiles - you only want a very thin glue layer. Position the pre assembled headlining/foam carefully as it is very difficult to adjust once you start.
I used to stick up headliners in Yachts and suggest you get 3M Super 77 multipurpose spray adhesive. The spray on is so much easier to use and faster as the spread out type takes longer to dry befor you can stick the two parts together. Just make sure you remove all the old headliner or carpet especially if its foam backed or you will only be sticking your new one back onto the old foam and that will break down and u will get it sagging again? Hope it helps 3M products are great take in what you are useing to an outlet and they will reccomend which one but the multipurpose will work.
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