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From: Location: at the right hand of Satan in Hell
my interior guy wrapped my entire interior with HUSH-MAT. it was half the price of dynamat also. he said it sticks better and deadened more sound as it is thicker or weighed more or something. all i know is that my car is QUIET and i got to pay half of what he wanted for dynamat.
I got a real good deal on Dyna mat from ebay. Just punch is a search and you should find some.
I also put duct insulation over the dyna mat from a local building supply house. It looks just like dyna mat.