Dynamat is rubberized asphalt. The asphalt is what adds to the mass of your car's panels to deaden sound, and the rubber holds it all together and keeps it flexible. This material is also called polymeric mastic and is available for a fraction of Dynamat's price from McMaster-Carr. The advantage of buying Dynamat, however, is that the material is lighter and has an aluminum flashing on one side that also helps keep out ambient heat.
Covering the sound-deadening material with a layer of jute (hair or fiber carpet pad) will help quiet your car even more and create a soft comfortable feel under the carpets!
JRSJ wrote:Did a quick search via google. Heres a qoute I found:Dynamat is rubberized asphalt. The asphalt is what adds to the mass of your car's panels to deaden sound, and the rubber holds it all together and keeps it flexible. This material is also called polymeric mastic and is available for a fraction of Dynamat's price from McMaster-Carr. The advantage of buying Dynamat, however, is that the material is lighter and has an aluminum flashing on one side that also helps keep out ambient heat.
Covering the sound-deadening material with a layer of jute (hair or fiber carpet pad) will help quiet your car even more and create a soft comfortable feel under the carpets!
Also, you can find this "Polymeric Mastic" at a home depot, its used for roofing houses.
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