anyone use spray-on sound deadener?

sohr · 06-01-2004, 10:14 AM

Hi All...

I'm looking for something to mitigate the road noise in my Jetta.

I know the standard is to use Dynomat or something similiar and line
the inside of the doors and trunk area. From most accounts, installation
is messy and not very straight-forward.

I was wondering if anyone has had good results with the spray-on type of sound deadener... such as the kind sold at quietcar.net? I'd prefer to go this route-- I could just take off my door panels, spray, let dry, and put the panels back on-- if it works.

It also seems cheaper than Dynomat... so it seems to good to be true... any input?

Defiler · 06-01-2004, 11:02 AM

If you want cheaper get a truck spray-on bed liner. I heard those work pretty well. I've never used it before so see what other people say about first I guess.

[iG] · 06-01-2004, 01:21 PM

After reading quiet a bit about the spray on's I'm still very sceptical towards their sound deadening capabilities. I mean.. Dynamat and similar products have a layer of material that helps to eliminate road noise etc. But a spray on? Must be some magical particles reflecting the soundwaves or something

Defiler · 06-01-2004, 01:25 PM

I thought sound deading is mostly a matter of adding mass to the metal to make it harder for sound to pass through. If I am not correct on this please correct me.

heypachuco · 06-01-2004, 01:48 PM

I've used the spray-on stuff and it doesn't work as well. It is great for hard to reach areas (inside corners of doors, inside tailgate, etc.) but the roll on stuff is more effective. I sprayed the walls of my Blazer, ans all I got was a clean surface to roll some Dynomat on.

falconey · 06-01-2004, 01:49 PM

Quote: Originally Posted by Defiler

I thought sound deading is mostly a matter of adding mass to the metal to make it harder for sound to pass through. If I am not correct on this please correct me.

You are right defiler. It's about loading up on mass. Because most of the deadeners have a hard time holding up on the bottom of rear decks I've heard that people are turning to the spray on's. They get mostly good reviews but spray on's are truly permanent so beware of that. Just from the info I have on them I would only use sprays on for the bottom of the rear deck and the door panels. Otherwise I'd stray away from them.

falconey · 06-01-2004, 01:50 PM

Quote: Originally Posted by heypachuco

I've used the spray-on stuff and it doesn't work as well. It is great for hard to reach areas (inside corners of doors, inside tailgate, etc.) but the roll on stuff is more effective. I sprayed the walls of my Blazer, ans all I got was a clean surface to roll some Dynomat on.

We posted at nearly the same time, but were thinking along the same lines.

blackaccrd00 · 06-01-2004, 02:03 PM

You may want to check out the Edead V.3 from Elemental Designs, not spray on but brush on. I ahven't tried it but heard lots of good things about it. I will prolly order some soon. www.edesignaudio.com

sohr · 06-01-2004, 02:21 PM

Oops... the website with spray-on (and brush-on) sound deadening material is carquiet.net , not DOT com.

So the consensus is a definate maybe?

Snootch · 06-01-2004, 02:47 PM

spray-on makes sense, due to you being able to fill every nook and cranny, but the problem there is that it's thin. Like Defiler said earlier, the goal of sound-deadening in the first place is to prevent panels from rattling by adding mass. A thin coat of something is not going to add much mass. If you want something that covers well, and are apprehensive about stick-on deadener sticking to your metal, the brush-on stuff is the ticket. i have heard great things about the EDead brush-on deadener. The only downsides i can see to using a brush-on, is that you have to wait for it to dry, and it's a frigging mess to apply.

heypachuco · 06-01-2004, 03:44 PM

Do it on a sunny day so you can keep your doors/trunk open. The fumes are pretty strong and if it's raining it will take forever for it to dry.

Lacoste · 06-02-2004, 12:17 PM

Anyone have any idea about flammability? I was going to go with the spray on ones in the past, just for some minimum dampening, but the cans say that the stuff is highly flammable. Since I race and track the car, it's not something I really want all around me :P

L

Snootch · 06-02-2004, 12:33 PM

I'm sure the can was mostly reffering to the propellant in the can. But i'm sure the dried material is just as flammable as the insulation on all the wiring in the car. Heck, call the manufacturer's # and find out.

sohr · 06-02-2004, 12:41 PM

Quote: Originally Posted by Lacoste

Anyone have any idea about flammability? I was going to go with the spray on ones in the past, just for some minimum dampening, but the cans say that the stuff is highly flammable. Since I race and track the car, it's not something I really want all around me :P

L

Quiet Solution has a flammability lab test report on their website for their
spray/brush-on dampener:

http://www.quietsolution.com/FMVSS30...k_Fire_prn.pdf

Alas, I can't make heads or tails out of the results, though-- it's a little
too technical for me.

Snootch · 06-02-2004, 12:56 PM

"Neither ignition or flame travel occurred"
That sounds to me like it's not flammable whatsoever.