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Thread: Sound deadening...

  1. #1
    Maximum Bitrate Psychobiker's Avatar
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    Sound deadening...

    Hi,

    I'm wondering if anyone has used barrier matting (lead-impregnated rubber matting!) in a car before, and if so how well it works. A friend did say that I can't put it anywhere near the exhaust, or possibly even the floor above it. I could put it on the first layer of mats (already weigh some 8kg each), but below the top dressing mat, or is it better when in contact with the vibrating metal itself? Definitely some :
    On the transmission tunnel (2 layers)
    the whole rear floor (80"x36" or thereabouts)
    on the rear wheel wells
    and under the driver and passenger mats and on bulkheading.
    He also mentioned some kinda spray-foam? which is this?
    1996 Volvo 850 T5 CD - Eventually I'll start....

  2. #2
    Maximum Bitrate Snootch's Avatar
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    I've never used it, but it should work. Remember, all you are trying to do is to stop rattles by increasing mass. A good spray foam that is used for sealing off compartments is called great stuff. I don't know how good it is at sound deadining though.
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  3. #3
    Maximum Bitrate Psychobiker's Avatar
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    but it can't be put in the doors, lol the window won't work
    1996 Volvo 850 T5 CD - Eventually I'll start....

  4. #4
    Maximum Bitrate Snootch's Avatar
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    I've used some stuff I found at my local home improvement store called "Quick Fix" gutter repair tape:



    I think there is similar stuff called "peel n' seal". Both products are made for roof repair I believe. Here are a few pics of my car interior with the deadener installed:


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  5. #5
    Maximum Bitrate Psychobiker's Avatar
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    How well does it work? much road noise?
    1996 Volvo 850 T5 CD - Eventually I'll start....

  6. #6
    Variable Bitrate HHdesign's Avatar
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    I used Peel'n'seal. Its great accually, proably the best money I have spent on my Jeep. I put down two good layers and three over the wheel wells.
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  7. #7
    Constant Bitrate
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    Quote Originally Posted by Snootch
    I've never used it, but it should work. Remember, all you are trying to do is to stop rattles by increasing mass. A good spray foam that is used for sealing off compartments is called great stuff. I don't know how good it is at sound deadining though.
    Not just that, rubber type products absorb vibration. Steel is much more massive than rubber but if you bang two pieces of steel together they will chime or resonate; two pieces of rubber banged together won't.

  8. #8
    Maximum Bitrate Psychobiker's Avatar
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    presumably it's quite good (the foam) as it contains loads of air, which can trap sound. Right, I was belting downthe motorway at 90+mph and I wondered why i could barely hear myself think - I'd left the 2" thick rubber deadening mats at home for the Roadworthiness test (which it passed BTW )
    1996 Volvo 850 T5 CD - Eventually I'll start....

  9. #9
    Low Bitrate tasteItheIvalue's Avatar
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    I used the stuff in my trunk, works very good. killed all rattle from the subwoofer. Also now if u knock on the trunk, it sounds solid... knock on the doors its tingy. i will do the doors next.

  10. #10
    Variable Bitrate HHdesign's Avatar
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    Snootch, how much did that stuff cost you and how much do they give you?

    Peel 'n Seal recently must have gone up in price. I used to pay $10 ish, then $12.47, now its $13.68.
    Jeep Grand Cherokee Laredo
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    CDT ES-620 (omg yayay!!!1)
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