Re: B-quiet for road noise
On my roof the shop used a 1/2" or so foil backed pad that they glued on. I live where it gets HOT (120 most summers) and would be afraid of the dynamat type products falling off and having to remove the headliner to fix it. Some claim it will stick but that is too big a risk IMO. I have stick on butyl mat most other places.
68 RS Coupe 327/350 TH, Detroit Speed, Hotchkis, Vintage Air, 8.5" 3.42 posi 10-bolt, MagnaFlow 2 1/2" exhaust, etc.
"The public cannot be too curious concerning the characters of public men."