![]() There's a great post on where the OP was sorely disappointed in how little a difference in noise reduction resulted after covering everything with deadener: Contrary to popular belief, you DO NOT need to cover everything with this stuff. There are lots of options for deadeners, some more costly than others, but general consensus is that you want to stay away from asphalt based products, like 'peel and seal' as found at home depot etc, and stay with a butyl based product. I wanted to do the job myself and keep it as cheap as possible - cost was a primary factor. The other components are the sound deadeners, (Dynamat, Raamat, eDead, B-Quiet etc), which reduce the resonance in the sheet metal and an isolation layer (normally foam) to decouple the panel from the barrier material, the MLV. Note that the MLV is only part of a soundproofing solution. You can get 1/4" MLV as well at 2lb/sq ft but it's apparently a lot harder to work with and you're probably looking at diminishing returns in any case. ![]() On the other hand, if you want to cut the road noise, this is the stuff. If you are a weight weenie and trying to keep your car light, it's not for you. The density of the product is the key and standard 1/8" MLV is usually about 1 lb/sq ft. Lead is what they used to use for a sound barrier but due to the toxicity, you don't see it used much anymore. ![]() Mass loaded vinyl is a limp heavy material that is a modern day substitute for lead. I did a lot of research and it all pointed towards using mass loaded vinyl as a barrier material to really cut down on the noise. Definitely not bad but our cars could stand to be a bit quieter - not quite luxury rides from a sound perspective. We use the car regularly for roadtrips and while I only have an axleback right now, I'll be installing a CBE shortly and that, combined with louder tires (Nitto Neo Gens) at higher tire pressures with a stiff suspension setup, leads to a fair bit of noise. So, I've been wanting to make my car quieter inside for a while.
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