I read a comprehensive comparison review on sound proofing products and Second Skin came out on top ... even better than Dynamat Xtreme. Apart from these 2 , many of the other sheet products are to be avoided because they have ashfalt as opposed to Butyl ... ashfelt which has much lower heat resistence and therefore starts to smell after a few years!! Whereas Butyl is much higher heat resistent .. higher quality product which is why D.Xtreme is much more expensive.
