ziz ejaculated:

I have a Volvo S80 saloon with an excellent sound system. I listen to
a lot of music in the car and would like to soundproof the car.
Can anyone offer advice on:
Where to buy materials.
How to go about it.
I am happy to spend the time doing it well if I can get some detailed
advice.
Many thanks.
Mick

Dynamat! You should need to much as the car is pretty solid, but its worth
paying a decent in car firm to properly removal the panels, install proofing
and re-assemblle the car.