When I stripped my car, I found the haze that covered all my windows was not age or scratches. It came off with lacquer thinner from the inside of the windows when I cleaned up the black windshield sealer. I assume the window haze may have been VERY old spray glue that someone had over-sprayed from inside the car and never fully cleaned up. I don't want to make the same mistake since my doors (windows), dash trim and some other minor interior trim is still installed.
The aerosol spray-on trim/Headliner glue says to apply to both surfaces to be adhered. I don't want to spray it inside the car and risk damaging my interior surfaces/glass (or exterior paint) with the resulting "cloud". Is there some type of glue (I might already have) that would work to glue in the headliner insulation? (Liquid nails, construction adhesive, household silicone?). Will the trim/headliner spray glue work if I spray it only to the insulation and then install it in the car?
We have high temps in So. Calif (110+ summers), so I need it to stick and not fall down with the heat. I work with the spray glues all the time and use a heat gun to separate pieces. So it may not be the best choice.
One quick other question. How do I clamp the insulation in place while it dries? The bow will hold it in place, but not give pressure to the entire area.
Thanks everyone.

 

I just used 3M spray-on adhesive. NPD sells some headliner glue that works well on headliners. It is a brush-on contact cement. I don't know if it would be easy to put on the insulation though. My insulation held itself on after I let the adhesive dry enough to become tacky.

 

Roll the door windows down, newspaper and masking tape to mask off and catch any overspray of the glue. As far as holding the insulation up see what you have laying around that you can cut to length, like broken broom sticks or what ever you have.

Test fit the insulation in place, use some 4" x4" plywood pieces and prop the plywood up off the floor. This will give you the extra support in areas that you think needs it. Spray the glue on the roof and the insulation wait till it is starting to get tacky and then apply it too the roof.

Maybe do a test sample on a peice of scrap insulation and scrap metal so you can get a feel for how quickly the glue dries, this will let you figure out your timing for how long to wait after spraying and installing the insulation.

 

Any spray adhesive will work for the insulation and you don't need anything to hold it up. Simply spray 1 side of the insulation and then the roof as well. Let Dry... Now give the insulation a very quick light spray and stick it up. the bond is almost instant. Most of these sprays will dry within a minute or 2 and you don't need much.

I use 3M and some Second Skin adhesives as 1 can was almost empty. Both bonded right away and dry time was within 2 minutes. I have no fear of it ever simply falling off the roof.

Any glue/adhesive that you use which only goes on 1 piece I guarantee will not hold up as well as doing it correctly and spraying the insulation and roof.