I know personally one person's van that has Dynamat in it and it's a dream. Solid sounding doors, totally different ride/driving experience on the road. Just does not sound like a vanagon.
 
I have a roll of B-Quiet that I've used on a few surfaces and it's incredible stuff. Probably more expensive than most other options though? .... but I haven't priced others.
B-Quiet is a sort of tar paper that's quite thick and flexible on one side, and a thick aluminum foil stuck to the other side, so you wind up with the thick foil facing the inside of the van and the tarry stuff stuck to the metal. Good stuff, tough, durable, very easy to apply, cut and work with and thin enough to use in tight spaces without interfering with things like rolling-up-windows.
Bob Stevens
'87 Syncro Westy> - Boom Mat > - Dynamat Extreme> The Boom Mat product is more expensive yet claims to be better> Any recommendations?> Thanks,> Mike,> '87 Westy
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