Sound Deadening

I have used RAAMmat BXT. Good product and decent prices.

ONe thing to consider is whether it's butyl or asphalt based. Asphalt based products are more inclined to fail from heat. Just something to keep in mind. On floorpans that's probably not much of an issue. Doors and roofs on the other hand...

The catch: butyl-based products generally cost more than asphalt.