Sound deadner

[claytonisbob]

I question whether the thickness of the constraining layer is important to absorbing vibrations. Typically its just a thick layer of aluminum foil thats sole purpose is to give the butyl something to stick to. The only real reason for a thicker constraining layer is for heat dispersion. A thinner foil layer makes installation easier, and allows for the use of more butyl rubber within the same thickness range. Example: Product A - 4mil constraining +61 mil butyl. Product B - 1mil comstraining +64mil butyl... both A & B are 65mil mat)

Being your sticking the mat to a metal surface, adding 4 mil of aluminum to it hardly seems like it would make a difference. I have installed both Dynamat and eDead, I do have to say I liked the way the Dynamat looked with the thicker aluminum layer (it gave it a harder surface... more difficult to dent with a fingernail) but the eDead doesnt cut your fingers when your installing it, and its easier to bend around contoured surfaces...

If I had to take my pick though... spray in. The next car I do will probably be sprayed with Second Skin or something similar.