whats the best sound dampening mat

[GMC Guy]

Originally Posted by 78 Chevyrado

I covered the outer skin, the inner skin and anywhere else I coud reach to put the stuff except the very bottom of the door (don't want any rust to start). I put 2 layers on the outer skin but one layer everywhere else. I was going to do the inside of the door panels too, but I ran out. I was so amazed at the difference in the sound when you shut the door.

how much did you order? and i suppose you're pretty happy with how it came out? lol