sound deadening

[kropekoi]

Hi all,

I just want to verify if its really true that if you sound deadening your car, it will make your car more heavy?

how many sheets should it take to cover the 4 doors, trunk and other things that needed to be covered? (Vios Sedan)

[derickveliz2]

Deadening a car is like having a 200 pound passenger all the time with you.

Deadening for what? blocking road noise? or Deadening to avoid rattles and make doors function more like speaker boxes?

D.