Down4Sound 320 mil Sound Deadener - RillaMat - 38 sqft

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d4s-320mil-38 sqft
  • Down4Sound 320 mil Sound Deadener - RillaMat - 38 sqft
  • Down4Sound 320 mil Sound Deadener - RillaMat - 38 sqft
MSRP: $299.99
— You save $70.00
Frequently bought together:


Down 4 Sound 320 Mill Sound Deadener 38 sqft Acoustic Foam 3 in 1

  • each sheet is 11 x 22
  • 22 Sheets
  • RillaMat 5XL the THICKEST Basshead Deadener in the World.

Made from the highest quality components, Butyl Rubber, aluminum and Foam

Before applying deadener, ensure the area is fully clean; we suggest using 80% rubbing alcohol. Once thoroughly cleaned and dry, apply sheet, and roll.

If applying in cold weather under 60 degrees, use a heat gun to apply or warm the area.

Watch out for airbag sensors and fastening holes for interior panels.


Warning this product may cut you, use safety gloves.

We are not responsible for any damages or cuts or applying errors.


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4 Reviews

  • 5
    D4S Deadener

    This 320 is no joke. I put down one layer on my floor and roof and my Kia is a different animal. The best part is even though it’s hella thick, it’s still pretty easy to work with. Absolutely worth the money.

  • 5
    320 mil mat

    Very great mat I used on back window of Tahoe and made the back window rattling go away pretty good I have a lot more deadner to put on but just from the back window I can tell a night and day difference

  • 5
    Rilla deadening

    I love it so far so good.

  • 5
    Sound deadner

    Product is great nice and think way better than what I used 15 years ago.

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