Sound proofing the Dart

Valiant1 said
How much will that add to the weight of the car?

The Peel & Seal weights 4 lbs per roll and it took 6 rolls to do the dart so 24 lbs. The foil faced bubble wrap is so light a huge roll weights 1 1/2 lbs. The Peel & Seal is .040 thick.

Dan