Best thermal and sound insulation for floor and headliner

[Charger Fan]

I'm close to installing the new carpet and headliner on my '73 Charger. I want to install good sound and thermal barriers on the floor pan and roof before installing either. There are lots of products on the market with various prices. Any recommendations on a good overall product out there that will achieve both thermal and sound barrier protection?

 

[Davefinan]

I , also , am interested in some advice on this. Just got a 76 b100 van and it’s a blank canvas right now

 

[Biopack]

I used the Kilmat product. I recommend the 80mm and it is available from Amazon.