[Kube]

I've had a few guys ask me what I use for sound deadening, etc. I have always used the foil lined insulation available at any decent builder supply house. Very economical, holds up extremely well and is easy to install.
I also install a moisture barrier on the doors. I was taught to do this by an "old timer" that owned and operated an upholstery shop for better than fifty years.
The barrier is most likely not necessary, especially considering these cars rarely, if ever get driven and certainly not in rain!

Still, can't hurt...