Sound deadening on the cheap

skyhighZJ

skyhighZJ

Gov retirement < needs to live
Joined
May 31, 2012
Location
Aberdeen, NC.
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So I have been wanting a way to drown out some of the exhaust in my 97 cummins. In the cab the exhaust note was a bit much. Getting rid of the 5 inch pipe was out of the question as it helps keep the engine breathing right and the EGT's down. Started looking at options and most of the name brand options were out of the question due to the $$!. After looking around I realized that adhesive ice and water shield for roofing is basically the same thing for a fraction of the price. I started with the doors and wound up doing the entire cab. Floor, sides and back wall behind the back seat. At first I wasn't sure if it would be worth the pain of gutting the interior but after driving it for a couple days it was money WELL spent!! I did the entire interior and doors with one roll and have left overs and all for $105. I bought the peel and seal 36"x 33.5' roll from ABC Supply here in Fayetteville. Installation was easy (except for gutting the truck lol).
1.Cut the approximate size you want (a good sharp blade in a utility knife works fine)
2. peel the paper
3. stick the topof the piece to the area such as the door
4. use a heat gun and a wadded up cloth shop rag to "wipe" the softened material into the nooks and crannies. Boom done.

As for the floor I cut it to length from the back wall to include the slope into the firewall. I only peeled so much paper as I could place and stick at a time or it gets stuck and crinkled in the wrong spots. In some of the bigger compound corners I slit it then went back and covered it with strips. I also double layered the back panel behind the back seat as it seemed to be the biggest culprit of the resonating. Biggest thing is be aware of screw and bolt holes so you can poke them out before re-assembly and you don't need much heat especially along the edges of the rubber shit will smoosh out. Didn't take many pics as I had to work hard to do the whole cab in one day. Any questions though just holler.
 
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@taylor1 , yeah it's pretty damn permanent so make sure you place it only where you want to not have access to in the future. Although if you need access to say the power window motors or such you can cut through it to access the holes in the doors and then patch it with a new piece
 
Car audio people have been using that stuff for many years. There's something about it that's not as good as dynamat or the other car-specific products, I can't remember what it is.
 
The only thing I found after reading a bunch of forums is that in extreme heat situations it can sag a bit but for the most part the only complaint I have is a bit of an odor but it has already gone away.
 
Does anyone still have the wrote up Rich did years ago on his first gen?
 
Ron said:
Does anyone still have the wrote up Rich did years ago on his first gen?
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It's on here somewhere. That's basically the same thing he used.
 
I've done this before on a couple of vehicles. Also really helps if you get it on the roof, and inside the doors - on the outer door skin.
 
I bought the Dynamat Xtreme last summer and did the roof and cab walls/doors on mine. It definitely took all the rattle/tinny sound out of the roof (when it rained it would sound terribly loud). I actually have not driven it on the street since I did it so I am not sure how well it toned down the road noise but I am sure when I do it will be noticeable.
 
I used 3-4 rolls of P&S in the old Mustang GT... took the noise levels (flapping sheetmetal, parts buzzing from the resonance/frequencies, etc.) a bunch.
What really cut down on the drone (& accompanying buzzing) was a couple of 1/4-wave traps on the exhaust... worth every penny!
 
What about a Sound Absorbing Mat? That's what I need. The dump truck I drive, like most modern large trucks, has a Very Large, Noisy, Roaring, Radiator fan! When that sucker cuts on, Everybody Knows it! My cab, doors, floor, & cowl, are fairly well insulated. The Fiberglass Hood, is Not. I'm thinking If I stuck a mat to the inside of the hood, that Absorbs sound, That would make the most difference. I Know there is some type of acoustics made, but I haven't searched yet. "Can you hear me now"?
 
rodney eppes said:
What about a Sound Absorbing Mat? That's what I need. The dump truck I drive, like most modern large trucks, has a Very Large, Noisy, Roaring, Radiator fan! When that sucker cuts on, Everybody Knows it! My cab, doors, floor, & cowl, are fairly well insulated. The Fiberglass Hood, is Not. I'm thinking If I stuck a mat to the inside of the hood, that Absorbs sound, That would make the most difference. I Know there is some type of acoustics made, but I haven't searched yet. "Can you hear me now"?
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That knob with the red ring around it fixes all my noise issues
 
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