dynamat for A Body tell me about yours...
I purchased a roll of roofing ice dam membrane material. Quite heavy with a sticky back on one side. It was less than $50 for a roll that is big enough to do several cars. I put down two layers then a layer of jute over that. Made a noticable difference in the road noise and exhaust note coming up through the floors.
There is no asphalte smell from this stuff.