I'm using a material that's like Dynamat just not as thick so I'll layer it.
It doesn't cost much. Been a bunch of reviews of people that have used both, so I'll give it a try.
One roll is like $17 and you can buy it at your local Home Depot. To me anything is better then nothing. We'll see how it works and I'll try and do a video of before and after.
I hope it is not asphalted sheeting. That stuff stinks up the vehicle and does not really hold up well to the automotive environment. I used Raammat in my STi and it worked really well. it is Butyl based and not asphalt based. check it out. Raamaudio