Gold Lifetime Member
Join Date: Jun 2009
Location: Tomball TX, DeRidder LA
Re: Sound deadening ????
I always used Dynamat, later Dynamat Extreme. It works as advertised. It sticks and will not fall off with time. I think you have to freeze it for it to be removed. It provides sound deadening and reduces the heat transfer into the cabin of the car.
There use to be some good information about the product on the internet years ago. I saved some technical pdf files that show just how much it reduces vibrations. If someone wants a copy, send me a note.
There is a aluminumized tape that should be put over the seams. Many people don't use the tape. Dynamat is like a radiant barrier in your attic of your house. The shiny aluminum on the mats and tape reflect the heat away from the inside of your car. Also the tape helps prevent water from collecting in the seams between the mats.
There are other manufacturers that make products similar to Dynamat. I am sure some of them work just like Dynamat. Some of them will smell bad for a few days. Dynamat does not stink, if that matters.
Dynamat makes a product that goes under the hood of your car. It is called Extreme Liner. It is made of neoprene foam, acoustic lead, acoustic foam, 3 mill urethane top outer covering. I stuck this under the hood of my trunk. After 16 years, it has yet to fall off. This made the most dramatic reduction of sound in my truck.
On my Firebird, I used a combination of Dynamat and Lizard Skin. I used the Lizard Skin for areas that are hidden from view and might get wet. It can be painted or sprayed on. It has the advantage of sealing the metal. I painted it in the inside of the cowl panel where the wiper transmission goes. I painted the inside of my quarter panels and doors before I installed them. I painted it on the under side of my trunk pan where the gas tank is located. I poured it in the inside of the deck lid.
Money can't buy you happiness but it can buy you car parts which is bout the same thang.
Last edited by tp_smith; Jan 28th, 19 at 10:21 AM.