The last couple projects have had the inside coated with a product called "peel and seal". Specs are the same as other vendors with a price that blows away the competition.
I ordered a roll from Lowes, 36" x 33 1/2' *yes, a roll over 33 ft. long* for around $110 shipped to my door.
Mathematically it's less than 1/2 the price of Dynamat
Hope this helps a few people!
chris<pixelmonkey>:D
