I'm going to install my first headliner 1965 Dart

I used some thick jute padding with some foil backing. 3M spray adhesive to hold it in place. This stuff was hard to cut! The razor blade barely made it. Cutting with scissors was a difficult task too.

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This stuff is easily 5/16" thick. It seems like it would be really good at sound absorption. I have been wanting to redo the headliner in my Charger, partly to add some adequate sound deadener like this.
Here is the product sheet:
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Back to work tomorrow so I may not have any updates for a few days. Thanks for checking in.