Sound Deadening

I'll be adding some to my Duster when I get to the interior. Trying to keep the weight down, but think the benefit of the sound deadening material will offset the weight gain. Approximately how much weight will this add...ball park? Would one brand be lighter than another? Just curious.

Thanks folks,
Pat

Hard to guess, but I'd say the roll I got weighed about 30 lb, and it was enough to do both my standard cab D100 and my convertible.