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Thread: Sound Deadener

  1. #1
    Join Date
    Oct 2011
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    184

    Default Sound Deadener

    Hey guys do you put any sound deadening material or spray inside the doors of 69 Camaro? I was thinking to spray boom mat spray in there since putting an actual material will be hard to get in there fully unlike a spray.

    I was also thinking to use the boom mat spray in other crevices like behind the quarter glass, trunk, firewall, etc where it would be hard or impossible to cover with material.

    Any recommendation also on which sound and heat deadening material to use on the floor, roof, etc where I can put material (not spray). I was thinking to use Hushmat, anyone have any experience with that? They have a complete kit for the whole car with panels already precut and obviously instructions on where to put what.

  2. #2
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    Nov 2008
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    Milwaukee, WI USA
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    Default

    Here's what I did on my 69 Camaro; on the outer door skins, I put 2 strips(roughly 5" x 36") of Dynamat Extreme.
    One strip above the crease line and the another below the line.
    Then, instead of using a standard watershield behind the door panels, I used Dynamat.

    Now the doors close with a "thud".

    It's not necessary to cover every square inch with deadener material.
    I also used strips of Dynamat behind the quarter glass and on the inside of the rear inner wheel wells.
    1969 Camaro SS, 350(NOM), M21, 12 Bolt Posi, 01B (Jan 69) LOS Build

  3. #3
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    Apr 2001
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    Default

    This might be useful reading.

    https://www.sounddeadenershowdown.co...FZQbgQodJFsCAw

    Andrew
    1970 GTO Version 2.0
    1967 Cougar build
    GM High-Tech Performance feature
    My YouTube Channel Please Subscribe!
    Instagram @projectgattago

    "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

  4. #4
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    Oct 2011
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    184

    Default

    Thanks guys, I looked at that website. Their complete kit is like $1k. There's a great write up in the interior section of the forum on this subject by JustJohn. I think I will use his advice. I think total for all materials will be under $500 by my calculations.

  5. #5
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    Quote Originally Posted by joeko23 View Post
    Thanks guys, I looked at that website. Their complete kit is like $1k. There's a great write up in the interior section of the forum on this subject by JustJohn. I think I will use his advice. I think total for all materials will be under $500 by my calculations.
    I forgot I made a video a while back when I was did the back of the GTO.



    Andrew
    1970 GTO Version 2.0
    1967 Cougar build
    GM High-Tech Performance feature
    My YouTube Channel Please Subscribe!
    Instagram @projectgattago

    "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

  6. #6
    Join Date
    Feb 2013
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    397
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    Quote Originally Posted by joeko23 View Post
    Thanks guys, I looked at that website. Their complete kit is like $1k. There's a great write up in the interior section of the forum on this subject by JustJohn. I think I will use his advice. I think total for all materials will be under $500 by my calculations.
    Make no mistake, their kit has all the right stuff, it is a little pricey though. All I really did was point out comparable materials available elsewhere.

  7. #7
    Join Date
    Sep 2004
    Location
    Arizona
    Posts
    167

    Default Quiet please

    Just call me lazy. http://www.quietride.com It only hurts for a little while, and doesn't weigh as much as a full cover of Dynamat or Gmat or Hushmat. Nicely die cut and ready to go. They use Dynamat strips to kill the sheetmetal vibes and then an insulation layer. I have used it on a couple of projects and could not be happier with it.
    Last edited by oleyeller; 06-22-2017 at 06:33 AM. Reason: spelling errrror

  8. #8
    Join Date
    Oct 2006
    Location
    Pittsburgh, Pa
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    563

    Default

    I didn't use any sound deadeners in my 69 El Camino because I didn't want to breath in the toxic fumes from that stuff.

    I once used POR15 and had to get rid of the car because my wife would be sick riding in it. Everything was fine until I painted that POR on the under carriage, floor and trunk.. Turns out that stuff rips like cheap cellophane. I went back to using conveyor belt spray grease....

  9. #9
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    Feb 2018
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    Southern IN
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    This is one of those build areas where it's easy to skimp because, aside from driving a car that has it vs one that doesn't, you'd never really appreciate the difference that sound deadening makes. It's definitely not cheap but even just putting a layer of Dynamat, etc. down will make a huge difference in vibrations and make for a better build. I used Dynamat Extreme on every square inch of the interior and cowl areas and then covered that with a layer of Dynaliner 1/4" thick foam. Although each has its own properties, I felt the biggest difference came from adding the foam. You could knock on the floor, etc. and it was a very dull sound, not distinguishable as metal at all.
    All in all, despite having spent some serious money on it, I'm convinced it's worth every penny. You don't have to go crazy but try to plan it into the budget and strategically place it where you can get the biggest bang for your buck. I'd stay away from the pre-cut kits as that will drive the cost up. Also, apply it first in the areas you can't get to once the car is complete (floor, headliner, dash, etc.) as you can always go in and add it to the doors, etc. later on as the budget allows. Hope this helps!

  10. #10
    Join Date
    Aug 2007
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    135

    Default

    I typically line the entire interior with Dyna Mat type material. It's about 3/16" thick foil on one side and you peel off the other side and stick it down. I buy it in the bulk sheets and cut to fit. I add a few strips to the inside of the roof. And then as said above add strips inside the doors. It's amazing how much better it makes the doors sound when they close.

    After the Dyna Mat type material over the top of that I add foil on two sides with insulation in between. It's about 3/8" thick. I use spray glue to hold it to the first layer. Then carpet over the top. Makes for a very quiet and cool interior.

  11. #11
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    Jun 2010
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    Deployed
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    I have the foil back/tar material, they have so many brands these days. I think the last brand i used was nicco. I put Dynalinder on top of that. The foil back/tar like mat does absolutely nothing for noise. All it does is keep down the resonance of the sheet metal. If want the interior to be quiet you need an insulator like the foam cellular mats.
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    1970 Camaro/DSE build


    Are you driver enough? Maybe....come on blue!
    https://www.pro-touring.com/threads/...71#post1147371

  12. #12
    Join Date
    May 2011
    Location
    Hendersonville, NC
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    49

    Default

    Have any of you guys used the Restomod Air sound deadened/insulation material?

  13. #13
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    May 2018
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    way east on a rock
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    Default

    I used Focal Bamm in my latest installation and have to say it is a pretty good product. By tech specs it outperforms it's competition by a smidge, but in real world it makes a hell of a difference. Bad pic, but we put it EVERYWHERE, my doors sound like a vault closing. The glass becomes the weak point of coarse, but it dropped ambient by 6db.
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  14. #14
    Join Date
    May 2011
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    287

    Default

    Is the water shielding under the focal Bamm product or you use the in place of it in the doors?

    64 F-85 post car Pro-Touring project-my RV when I retire
    2nd owner 63 Corvette vert




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