The insulation used in the blower fan cabinet has...

Question

I have a GMS90904CXA Goodman heater in my attic space. It's a leftsided mounted install. The insulation in the blower fan cabinet has fallen off the cabinet wall. I would like to know what type adhesive should or can I use to reattach it. The insulation has the old adhesive dried up on it. I was thinking of using a heavy duty construction adhesive called "Liquid Nails" I was concern if it would hold up to the heat, if it was flamable, and would it adhere to the old adhesive. Thanks for your help