Headliner Insulation..???
I have not had issues with it bulging in spots. It can compress down to the thickness of matchbook paper. On the flatter areas on the floor, I even doubled up the mat.
I sanded, primed and top coated the interior roof metal, and then used a spray bomb contact adhesive. I seal the edges down with the aluminum foil duct tape with half the width of the tape on the mat and the other half on the car's interior surface.
Here are some pictures of the insulation I did in my '68 convertible during my Vintage Air install. Notice how I used the foil tape to seal and hold down the edge in the last picture.
I have not had issues with it bulging in spots. It can compress down to the thickness of matchbook paper. On the flatter areas on the floor, I even doubled up the mat.
I sanded, primed and top coated the interior roof metal, and then used a spray bomb contact adhesive. I seal the edges down with the aluminum foil duct tape with half the width of the tape on the mat and the other half on the car's interior surface.
Here are some pictures of the insulation I did in my '68 convertible during my Vintage Air install. Notice how I used the foil tape to seal and hold down the edge in the last picture.
