OverKill™ - 1/8" Closed Cell Foam

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How Much OverKill Do I Need?

Vehicle Class

Call us to discuss your project. 1-800-679-8511

Vehicle Coverage

Estimated Square Footage

0Sq Ft
How do I get exact square footage?
  1. Get a tape measurer
  2. Measure the length and width of each surface
  3. Length x Width = Square Footage

OverKill™ - 1/8" Closed Cell Foam

Closed cell foam is an excellent piece of the puzzle to achieve your vehicle sound insulation goals. OverKill™ is the lightweight version flexible, vinyl infused closed cell foam. At 1/8” thick, it’s designed to fit into tighter spaces than our thicker OverKill™ Pro product, and is great for car door insulation under the plastic door panel. Closed cell foam sheets will do some work absorbing low-frequency sound waves, but OverKill™ really shines as a decoupler. Use OverKill™ to prevent any two hard surfaces from hitting each other.



  • 1/8” thick rubber infused closed cell foam
  • Highly water resistant
  • Adds some thermal insulation (r-value per inch: 4.33)
  • Decouple inside panels to create pressure, preventing rattles and squeaks
  • Each sheet is 24” x 54” (9 Sq Ft)
  • Weight = 0.06 pounds per square foot
  • Service temperature range: -40°F to 165°F (intermittent to 200°F)
  • Comes with peel and stick backing or you can choose your own adhesive
  • Made in the USA




 Size Options   1/8" or 3/8" 
 Square Foot Coverage   24” x 54” (9 Sq Ft) 
 Weight   0.54 lbs per sheet
 Adhesive Options  Peel & Stick or No Adhesive 
 Temperature Rating   -40°F to 165°F
 Thermal Insulation Rating (R-value)   4.33 per inch 



 Install Guide 

 OverKill Install Guide 


Material Testing


Installation Instructions

Recommended Installation: First, remove the plastic door panels and/or the upholstery on your vehicle (watch an in-depth guide on Overkill™ installation here).

  • Cut OverKill™ with scissors into the size(s) and shape(s) of the install location (be cautious of wiring and electrical components of your vehicles),

  • If getting the version of OverKill™ Pro without a PSA, use our Contact Spray Adhesive (1 can per 4 sheets) or Super Strong Double Sided Tape.

  • Install under rattling equipment to decouple from the floor.

  • To stop rattling panels, cut OverKill™ to fit and squeeze it into the gap to create a cushion for the plastic panel.

  • Wrap vibrating pipes to decouple from surrounding surfaces.

  • OverKill™ Pro should not be your primary noise blocker. It is an excellent decoupler and will absorb some low frequency sound waves, but closed cell foam does not have enough mass to effectively block sound and its closed cells mean it doesn't absorb sound well. Use it as a decoupler with our Luxury Liner™ MLV or under your vehicle's plastic paneling.



Common Product Uses


  • Doors - outer and inner door skin
  • Floor - decouple MLV from the front firewall all the way back to the rear deck seat wall
  • Firewall - decouple MLV on the cabin side
  • Trunk - decouple MLV along the floor and walls
  • Roof - decouple ceiling from the head liner
  • Decouple any plastic paneling from the A, B, and C pillars to your cup holders