who was that last post 2?
i ment to write pillow cases lol
ear plugs would do the same thing?
I've used flashing tape on my car, added about 4-5kg in weight I figure eat a few less McD/BKs/KFCs.
Done 2 layers in boot floor, doors, rear bench, rear 3/4 panel, and 3 layers behind speakers. Total cost of £30 for 6 sqr metres (64 sqr feet), in 10m rolls 20cm wide.
Overall effect is reduced volume from road/exhaust noise but still present. Might consider adding a layer of real sound deadening.