What sizes does OverKill come in?

OverKill comes in 24" x 54" sheets (9 sq ft) that are 1/8" thick. Each sheet weighs 0.54 lbs. Order boxes of 1, 4, 6, 8, or 10 sheets, with or without a peel-and-stick backing.

How do I adhere OverKill?

Choose the Peel & Stick option and OverKill arrives ready to apply. You can also use your own adhesive. MethodWhat you needInstall guidePeel and stickChoose the Peel & Stick option when you orderSpray adhesiveSpray P329 on both OverKill and the surface. Wait 2-4 minutes until tacky, then press until bonded.Install guideDouble-sided tapeSuper strong double-sided tape around the whole perimeter and an X across the middle. Press until bonded.Install guideDual LockDual Lock reclosable fastener, 250-pin to 250-pin. Best if you may need to remove the sheet later. Use 8" of fastener (4" per side) for each full 9 sq ft sheet.Install guide

How do I install OverKill?

To install OverKill, remove the upholstery, carpet, or plastic panels and wipe the bare metal with denatured alcohol. Cut the foam to size, adhere it, and then put the panels back. See our OverKill install guide for the full steps.

How do I cut OverKill?

A sharp utility knife or a pair of scissors cuts OverKill cleanly. Leave enough clearance to reinstall seats, carpet, upholstery, and trim.

What custom sizes can I order for OverKill?

We can do custom sizes of OverKill. Reach out to our team for details and pricing.

Is closed cell foam like OverKill good for car sound deadening?

Closed cell foam like OverKill is a good fit for stopping rattles and buzzes in a car. It decouples hard plastic from the metal behind it. For road noise, we pair Damplifier Pro for damping with Luxury Liner Pro for blocking airborne sound.

Can I use OverKill on a roof or headliner?

Yes, OverKill can be used on the roof or behind a headliner. If your main goal is insulation, it is too thin to add much. Look at a thicker material like Heat Wave Pro or Mega Zorbe. If you have another reason, send our team a message and we'll let you know what we think.

OverKill closed cell foam sheet folder over

OverKill can go behind small plastic panels too!

OverKill used as speaker ring to isolate a speaker from door panel

OverKill used to stop license plate rattle

OverKill™ Closed Cell Foam - 1/8"

In stock. This product ships in 1 business day

$26.99

Choose Sheets: 9 Sq Ft (1 Sheet)

9 Sq Ft 1 Sheet

36 Sq Ft 4 Sheets

54 Sq Ft 6 Sheets

72 Sq Ft 8 Sheets

90 Sq Ft 10 Sheets

Adhesive Options: No Adhesive

No Adhesive Peel & Stick

Square Footage Calculator

OverKill™ Closed Cell Foam - 1/8"

Closed cell foam is an excellent piece of the puzzle to achieve your vehicle sound insulation goals. OverKill™ is lightweight, flexible, rubber-infused closed cell foam. At 1/8" thick, it's designed to fit into tight spaces, and is a great car door insulation under plastic door panels. Closed cell foam sheets is not for absorbing noise, but OverKill™ really shines as a decoupler or gasket material. Use OverKill™ to prevent any two hard surfaces from hitting each other.

Features

Decouple inside panels to create pressure, preventing rattles and squeaks
Highly water resistant, rubber-infused closed cell foam
CCF sound deadening for isolation and decoupling
Made in the USA

Free domestic shipping on all US orders

Specs

Thickness Options	1/8" or 3/8"
Square Foot Coverage	24" x 54" (9 Sq Ft)
Weight	0.54 lbs/sheet
Adhesive Options	Peel & Stick or No Adhesive
Temperature Rating	-40°F to 165°F (intermittent to 200°F)
Thermal Insulation Rating (R-value)	4.33 per inch

Material Testing

Tested Properties	Testing Method	Performance
Chrysler, Ford, GM, Toyota	Company Specific	Approved
Hardness, Toughness	ASTM D 2240	40 +/-10 (Shore 00) - "very soft"
Compression Resistance	UL50	Suitable as gasket material
Compression Deflection (25%)	ASTM D 1056	2.0 - 5.0 psi
Flammability	FMVSS-302, UL94 V-0, UL94 HF-1	Pass
Fungus Resistance	ASTM G 21	Pass
Tear Strength	ASTM D 624	9 lbs/in
Tensile Strength	ASTM D 624	50 psi (minimum)
Service Temperature	ASTM D 1056	-40°F (low) \| 200°F (intermittent)
Water Absorption	ASTM D 1056	<= 10% (max weight change)
Fluid Immersion (7 days)	ASTM D 1056	<= 250%
Accelerated Aging (7 days, 158°F)	ASTM D 1056	Flexibility (180° bend): Pass \| Appearance change: None

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™ without a PSA, use our P329 Permanent Spray Adhesive (1 can per 3 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™ 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.

Read our article for more on how to soundproof car doors!

Common Product Uses

Doors - outer and inner door skin plastic
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

Resources

Installation Guides

OverKill Pro™ Install Guide

OverKill™ Closed Cell Foam - 1/8"

$26.99

Decoupler

OEM Approved

Reduce Road Noise

Thermal Insulation

Vehicle Square Footage Calculator

How Much OverKill™ Closed Cell Foam - 1/8" Do I Need?

Step 1: Select your vehicle type

Step 2: Select the areas you want to cover

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Yes, OverKill stops rattles and squeaks from plastic panels. This 1/8" rubber-infused closed cell foam fills a small gap between a hard panel and the metal behind it. The panel stays in place instead of buzzing against the metal.

The main difference is thickness. OverKill is 1/8" thick, so it is a good choice when clearance is tight, such as around gaskets and speakers. OverKill Pro is 3/8" thick, so it fills the larger gap behind door panels, pillars, and trim. Either way, pick the thickness that fills the gap with light compression. A loose fit will not stop rattles. Both come in 24" x 54" sheets (9 sq ft) of the same rubber-infused closed cell foam.

Product	Thickness	Weight per sheet	Best for
OverKill	1/8"	0.54 lbs	Tight spots around gaskets and speakers
OverKill Pro	3/8"	1.35 lbs	Door panels, pillars, quarter panels, trunk lid, roof braces

OverKill fits tight spots where thicker foam won't. Common uses are around gaskets and speakers, behind small plastic panels and trim, behind license plates, under rattling equipment, and wrapped around vibrating pipes. For the larger gap behind door panels and pillars, use OverKill Pro.

Yes, OverKill works around speakers and gaskets. At 1/8" thick, it fits tight spots where thicker foam will not. It is rated suitable as gasket material under UL 50.

For the best results, we apply OverKill on top of a constrained layer damper like Damplifier Pro or a liquid deadener like Spectrum.

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OverKill™ Closed Cell Foam - 1/8"