Insulation, Peel n seal and other budget insulation ideas

zigs said

I did mine quite awhile ago, price was reasonable had enough to do back seat area and trunk but I spose as most things its more expensive now.

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I think it got more expensive when bought as automotive insulation.:D
If I had heat problems and no head liner this is what I would use.
Cover the inside of the car with a drop cloth and spray the roof with 3M contact adhesive, then spray my precut piece already done with cloth and pop it in there. The stuff is so light I wouldn't have to worry about it's own weight pulling it down.