My 62 build is moving from the engine and driveline to the interior. I need to install some kind of padding for under the carpet and I do not want to use the jute type padding. I have seen the dynamat foil type peel and stick padding but, I am thinking that stuff is going to be too thin I've also seen on ebay some padding called Fatmat that is supposed to be 80 mils. thick, is that thick enough or does it need to be even thicker than that? How well does that foil type padding work? Do I need to be concerned about how thin or thick it is?