Yes, it is a good barrier. I am using something similar called Audimute. It's going to be effective on top of a foam layer. You don't really want to glue it directly to the deadener for the best results. When properly applied, it can lower your sound dramatically. You can see how I used it towards the end of this thread: Invasion of the door panel snatchers!!!
I found this quote for you from another thread. Not quite sure if it answers your question though. Sounds like a material worth looking into-thanks!
I found this quote for you from another thread. Not quite sure if it answers your question though. Sounds like a material worth looking into-thanks!
