Not to beat a dead horse and I know the Dynamat and Brownbread stuff has been discussed. My question is has anyone gone the cheap bastard route and tried using alternate products. I am thinking using a product used in cold weather roofing. There are a few differant ones. Some that come to mind are Peel n Seal, Blueskin, Peel and Stick and Ice and Water Shield Guard. They all sound very similar to Dynamat. They are all adhesive backed asphault silicon or rubber compounds that are 100% waterproof and stick like crazy. While doing a search for sound deadening material I came accross several car audio forums that said these types of products are the same as Dynamat but at a fraction of the cost. Obviously they are not the "same" but very similar. The cost for Peel and Stick for example is $50 for a 9"x33' roll, thats 33 feet not inches. $140 for a 3'x33'. I think I am going to take the plunge and get the Peel and Stick from a RV company that uses it to permanently cover old RV roofs. it comes in white or aluminium backing. After last weeks trip to Death Valley/Saline Valley and having to yell to my son in the backseat I am ready to give anything a shot. Dynamat is just too rich for my blood. Power front windows are next, and to all you purists who cringe at power windows
I will try and find some good links on the Peel and Stick if anyone is interested.