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OE sound deadening material

Discussion in 'Gen 4 Prius Technical Discussion' started by JosephG, Feb 28, 2020.

  1. JosephG

    JosephG Active Member

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    Anybody know what the OE Toyota (Denso?) sound deadening material is? I had thought it was asphalt or some kind of rubber, but I poked at it in the wheel well today and found it's a startlingly soft foam.

    I'm curious now what material they've used, it seems to work very well (at least everywhere it's been applied). Most viscolastic foam doesn't work well in this application.
     
    #1 JosephG, Feb 28, 2020
  2. alanclarkeau

    alanclarkeau Senior Member

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    You'd probably have to enquire of TOYOTA - all they say is:

    upload_2020-2-28_17-52-56.png
     
    #2 alanclarkeau, Feb 28, 2020
    krmcg likes this.
  3. Tande

    Tande Active Member

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    But, But,...My Gen3 was quieter than my Gen4 .....(engine noise inside the cabin).......:mad:
     
    #3 Tande, Feb 28, 2020
  4. CooCooCaChoo

    CooCooCaChoo Senior Member

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    I hear the tires rolling more than I hear anything else. I do need new tires soon though.
     
    #4 CooCooCaChoo, Feb 28, 2020
  5. Tande

    Tande Active Member

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    Yes! ......My wife still has a Gen3 & it's quieter inside than my Gen4......
     
    #5 Tande, Feb 28, 2020
  6. JosephG

    JosephG Active Member

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    The deadener in the floor plan is just plain old asphalt, it looks like the spongy material is for external applications.

    Incidentally, some of the asphalt had already come loose/crumbled and required replacement in my vehicle.:rolleyes: That's how I know, it's plain black when it breaks apart.
     
    #6 JosephG, Mar 4, 2020
  7. JasonB121

    JasonB121 Junior Member

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    This is my first Prius and after 50k miles, I wouldn’t think there was any sound proofing. My wife’s Miata is more quiet with the top down than my Prius.


    iPhone ?
     
    #7 JasonB121, Apr 16, 2020
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