Why pay 5 times more for this...

[ngsm13 5,000+ posts]

I stick by SecondSkin.

Superior heat tolerance and superior acoustical dampening properties.

nG

 

[Jaredl 10+ year member]

I have been looking to add sound dampening/deadening – whatever to my car as well. What http://www.sounddeadenershowdown.com seems to tell me is that basically certain products stick to your car better than others, while other products stink up your car and other products do not.
At the end of the day if you run to Menards or Home Depot to get your Sound Deadener/dampening/roofing whatever you want to call it, it’s the same expensive stuff that you spend the $$ for, just that maybe the stuff at Home Deport might make your car smell like asphalt and it might lose it’s stickiness and fall off. Also some material seems to install better.

I’ve been thinking of adding dampening to my car for quite awhile now (before I even knew what dynomat or Peal N Seal was) and came across this site: http://www.soundproofing.org/sales/prices.html they have pretty good prices, you can get 200 square feet for about $200 @ 1/8 thick. Their prices run in (Lin.) ft. A lineal foot is 48” width, 12” long. You can start at 1/8 thickness and go up to 2” if you want to spend the $$ on it.

I’m going to try the stuff from soundproofing.org, you use it for cars, boats, planes, etc where you want noise control, it adds a little weight to your car door, and probably will work better than roofing material or anything else that’s expensive, but it’s priced at the Peal N’ Seal price. Also it isn’t asphalt so it won’t stink up your car or anything. If you’re looking for Mass Loading, they also have “Super Soundproofing Silencer” which is $1.90 sq. ft. and weighs about 1 pound per sq. ft.

All the information that I researched on this, is that spending huge amounts of money on sound deadening material for your car is crap.

So if you’re tight for money, try the stuff from soundproofing.org or even try the Peal N’ Seal or roofing products, if you use a roofing product your car might stink (people say it goes away) and it might come off (If that happens, glue it with epoxy or something), or it might be harder to apply.

Other than that, don’t spend the huge amounts of money. If you’re tight for cash, try roofing material, worst that can happen is that your car stinks and it might fall off, if it falls off get some contact cement or something. As far as sound deadening is concerned you could probably put lead weights in your car doors and accomplish the same thing that dynomat is doing if you’re just “mass loading” your car doors. The stuff at soundproofing.org will probably do a slightly better job of deadening the road noise.

This is another pet peeve of mine, how many db’s of sound does dynomat or any roofing material reduce when installed in your car? That would be the true test and I’m almost willing to bet if someone spent the $$ on it they would probably ALL come out to deadening the same amount of db’s.

That’s my .02

marly

Sounddeadenershowdown certainly does not endorse Peel N' Seal or any other roofing products. These products are the same as cheap deadeners such as eDead, but don't compare to high quality butyl mats (Raammat, Second Skin, Dynamat). Butyl mats have much higher heat tolerances, which is a MUCH bigger issue than you seem to think. Cheap mats, if subjected to enough heat (which is very possible in a real world situation), will MELT, not peel off. Saving $.50/sq ft for Peel N' Seal is definitely not worth having to get a new interior when it gets covered in asphalt.

The stuff you're linking to states that it is foam, and non-adhesive backed (this can be a MAJOR problem for installing on the outer door skin). That is not the same as sound dampening mat sold by other companies. I should mention that you don't seem to understand the purposes of different materials in sound deadening, either (no offense, but different materials serve different purposes). Deadening mats are made of asphalt or preferably butyl, and, as you stated, mass load. You want the heaviest mat per square footage you can find, as these mats will mass load better. This creates a dead cabinet for speakers, killing vibration and improving low-frequency response. Acoustic foams, on the other hand, kill external noise such as road noise. This will account for the majority of the road noise reduction that you want. A combination of these materials will provide the sound improvement you desire. The product you linked to does not seem to be designed as a mass loading product but rather as an acoustic foam. Getting Raammat or Second Skin Damplifier is not that expensive, just spend a little more for something proven and correctly designed.

 

[taneks]

Getting Raammat or Second Skin Damplifier is not that expensive, just spend a little more for something proven and correctly designed.

I guess it depends on what we need....can it get an ecomony car to Lexus like quietness? If not, we should take a reality check to see if it is really worth it.