Originally Posted by
tulowd
spray on contact cement unfortunately is not heat rated and will loosen up over time with the incar temps we experience in the summer. Best bet is to wrap the material around the edges and use some industrial strength adhesive like those from 3M. Expensive and a pain to use, but worth it, especially give a headliner is the only trim piece mounted upside down - and in the warmest location to boot.
Saggy headliner is not exactly sexy, plus it might interfere with your forward vision, lol