Big Rik
+1y
You can apply your material directly to the cloth it wont hurt it, but i wouldnt advise using the 3m glue on your headliner. THe second that stuff gets hot, it looses its ability to hold, and more likely than not, your material will seperate, from the headliner. Spend the money and by some top and trim adhesive, make sure after you get everything in to lightly brush it with your hand so the loose wshag comes out, its not a fun thing to be driving down the road, roll down the windows, and then watch as loose shag start flying everywhere.