I've got everything (except my dash, etc.) out of my cab down to the metal floor, door panels off, etc.

My question: Is there a cheaper alternative to the Dynamat sound proofing stuff.
A friend of mine said to just use Grace Ice and Water Shield (Bitchathane, or whatever it's called) the black sticky material that's put on foundations and roof edges in colder climates.
Good idea? Seems like it would deaden transmission of sound and seal things up. Not too sure how it would adhere vertically to inside of the outer door skin for the door speakerst though.

Any ideas , especially from you younger stereo system sound guys would be appreciated.

 

I was just about to do the same thing. I have my cab stripped down to nothing, and I'm going to be putting about 3,000 watts of high end Alpine equipment into it.

Here is an intersting link to Dynamat alternatives:

http://www.sounddeadenershowdown.com/

 

Some type of heavy tar based roofing material should work. Hot melt glue or roofing cement should make it stick where you want it. The factory sound deadener I have seen on luxury cars and diesel trucks just looks like super heavy roofing paper with tar on it. You could take regular roofing paper if you put several layers on it.

 

That blue board foam insulation does a good job of soundproofing. We put the 2" thick stuff in the walls of my dad's 3/4 ton extended van and the 3/4 or 1/2" stuff on the cieling and under the plywood on the floor. It was like a refrigerator and it really made it quiet especially the road noise from the floor!! The Ac worked alot better it actually felt cold in the back of the van, It probably blocked all that muffler heat from radiating up. Use liquid nails stuff to glue it to the door skin, It should act like polyfil and help with the vibration and the box size(door)

 

I used roofing tar in the doors of my truck and a combo of tar and insulation on the floor and its on of the quiter older trucks I've been in. new weatherstriping around the doors and windows goes a long way too