Probably not. If you have a rattle it's because something is slamming against something else. Find out what it is and make it stop.
I just ordered a roll of RAAMMat BXT from raamaudio from the review. I paid a little more than Dynamat on Ebay. Paid $120 shipped for 64 Sqft Correction i paid less than ebay Because the tricky advertising for 100 sqFt of extreme - is not Dynamat extreme. They give you a Dynamat roller free but the material is a lower quality B-quiet material. After calculation the equivalent amt of material will cost $160 and on top of that needs shipping.