[Dunenutt]

Apply Dynamat to everything that wont be visible! Inside doors, firewall, back wall, if you can reach it stick it on. Dont leave gaps, and tape the seams. If you dont tape it, it will deposit gooey black nasty on everything it touches.

I shot mine with Al's liner, then dyna mat. Next truck I do will be shot with lizard skin then dyna mat, for better insulation.

The stuff is not cheap, but well worth it.