Carpet and sound proofing.

I've used the Peel & Seal with good results on a few vehicles. I'm too cheap to pay for a "name brand" if I can get similar results for less $$$. Expensive though they may be, do you honestly think the other stuff is specifically designed for an automotive application or a re-purposed industrial product?

First off, ALL of these products are HEAVY. That's how they work, they reduce the resonant frequency of a sheet metal panel by increasing it's mass. But you don't have to cover the whole panel to get good results.

Peel & Seal has an adhesive layer made of rubberized asphalt not just "tar". I won't claim it is absolutely odorless, but it's not bad. Read glossy brochure here: [ame]http://www.solutions.mfmbp.com/MFM-014%20ps%20brochure.pdf[/ame]

I wouldn't worry too much about heat. If you've even been on a roof or in an attic during the summer you'll understand that pretty much any roofing material has to be pretty darn heat resistant. In fact this stuff did a great job of blocking floor heat in my TR-6. I don't know if I'd put it on the roof panels above my headliner though. I might look for something lighter or spray-on there.