Dynamat / Peal n Seal... yes or no

Dynamat is a trade name.What most people use is what HVAC installers have been using for years to wrap and insulate AC/and heat ducts.It is an insulating product that comes in a roll ,shiney silver in color and sold at any hardware store in America.There is no glue on either side you simply use duct tape to seam it together and hold it down.It is flexible enough to use any where in the car.I used it in my car and I was amazed at how much it quieted the car down and kept it cool.All for less then 30 bucks a roll.