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Hello
I did not know how Dynamat worked when I did my first car and I ended up lining every inch of the interior with the stuff. It did reduce vibration noise and most of the chassis drone, but it was unable to reduce most of the outside sound, and it did add considerable weight. After reading to many posts regarding sound absorption, I decided to do a three layer approach in my second car using Dynamat, Dinaliner and Dynapad. I started with Dynamat only in the recessed portions of the sheet metal, then Dynaliner on the roof, doors, and on top of the Dynamat. To this I added two pieces of Dynapad on the floors under the rug. This definitely brought down the noise to almost contemporary car level. It's still very heavy but not as much as the complete Dynamat solution. Dynaliner is a very light two layer foam material. Dynapad its a very heavy three layer foam material of three different densities.
Hope this helps.
Cheers
MD
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"With an stock-original car, you serve the car. With a hot-rodded car, the car serves you."
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