Insulation and Sound Proofing?

I want to get ready to do the interior in my truck so for now I would like to sound proof and insulate the inside because it is very loud in it and cool and all but at times it's too loud to where I can't hear the radio unless it's turned as loud as it goes (I guess that is what really old worn out glass packs comming just out of the headers and stopping right pass the cab does). On LMC truck catalog (they sell Ford truck parts if you don't know already) they have a kit with the glue and 4X6 piece of mat for 30 bucks. I was wondering if anyone knew if Home Depot or such carried anything similar that will work? I plan to put that one stuff with the tar like adhesive on one side and the aluminum foil on the other inside my doors to help with noise too but don't want to put that on the floors. I would like to buy this stuff in big sheets so I can maybe even double it up, throw it on the firewall, behind the seat over the gas tank, under the headliner, etc.

Thanks a lot for any information on this!
Shawn-

the tar stuff with the aluminum is called dynomat. it works real good. i used it in my pickup and it made it alot quieter of a ride, keeping the road noise out. you should try it. you can get it at car sterio places or check online somewhere. its about $100-200, depending on the size you get. it just comes in a role and you cut it yourself. real easy.

I used that stuff in my truck too, I got it from Jeg's. I came in a big roll, with the foil on one side.
I put it on the firewall, above headliner, on rear cab behind seat and I'm gonna put it under the seat when I'm ready for that.
It was something like $25 for a big roll, it turned out I needed about 1 1/2 rolls to do everything.
That spray on glue worked real well too, you have to apply it to BOTH surfaces though.

Dynamat is great if you're wanting acoustic damping for high output stereos. Minimizes panel resonence & rattling. Can run you upwards of $2-400 to do a whole interior tho.
If you're just wanting to put in some decent insulation to damp the road noise & keep it warmer/cooler inside there are MUCH cheaper alternatives.

They sell the rolls of 1/2 thick felt/foam sheet with aluminum coating on one side on the JC Whitney bebsite. It's like $18 a roll & should take maybe 2 rolls to do your whole cab. I used it in a car I did a total restoration on, headliner, doors, rear qtrs & floor. Made a HUGE difference in sound & kept the temps manageable.
Just get some good spray adhesive like 3M-99 or better, cut, fit, stick, & you're done.

Thanks guys. And the stuff I was talking about isn't Dynamat or whatever it's called. It's stuff you can get from home depot used for roofs, etc. There is a link around here somewhere for it but that isn't what I am looking for. But thanks. I will check out what you mentioned VW.
More oppinions are still appreciated!

VWstreetrodder seems to have come up with the right answer. I was thinking of the material that you can get at trim shops called jute felt, but it's old school and his suggestion seems to have more merit.

Hey FMX---I just used the home depot stuff inside my model A roadster pickup doors. I goes on really nice, and it certainly deadens the "tinny" sound of a metal door. The only concern I have is how well it will stay on a vertical surface. It is made to lay with the tar side down on a roof. I just wonder if after a day parked in the hot sun I will have all this stuff slumped into the bottom of my doors. I hope not.

Bought mine at a local roofing supply. Peel and Seal. I think it was about 18" wide by 33 ' long. If I remember it was about $25.00 per roll. I was also worried about it sliding on the vertical surfaces and on the roof so I used some 3m Super Adhesive as added adhesive. That stuff is definately stuck on now. Ive had to remove a few small areas and basically had to chisel the stuff off. Sure made a difference when I shut the doors now. No tinny clang.

Yeah that stuff for the doors is great. I do not want to use it on the floors or nothing because I need something for insulation and sound proofing at the same time (mostly insulation for those hot days).