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NVX SDBTK20 Premium Stealth Black

91 mil 20 sq ft Car Trunk Sound Deadening Kit (Five 18" x 32" Sheets)

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• 20 square feet sound deadening kit
• Solid black design for any stealth car audio installation
• Material Used: Vibration Dampener
• Material Thickness: 0.091 (2.3 mm)
• Install Location: Trunk
• Pack includes five 18" x 32" sheets

Learn more about the sdbtk20
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Universal – fits most vehicles.

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List price $71.99
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-17%

$59.99

 with warranty
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Product Highlights


• 20 square feet sound deadening kit
• Solid black design for any stealth car audio installation
• Material Used: Vibration Dampener
• Material Thickness: 0.091 (2.3 mm)
• Install Location: Trunk
• Pack includes five 18" x 32" sheets

Description


NVX brand icon

Authorized dealer

Sound Deadening 18 By 32 Inch Pieces
Increases Sound Quality No Filler Easy Installation
Butyl Rubber And Aluminum Foil

Product Details:

  • 20 square feet sound deadening kit
  • Solid black design for any stealth car audio installation
  • Core is based with 100% pure butyl rubber to withstand extreme heat
  • No asphalt, tar, or cheap fillers - will not outgas, melt or fall off
  • Waterproof barrier protects against moisture damage and mechanical oils
  • Up to 30% thicker than cheap 50–80 mil alternatives
  • Flexible aluminum backing contours tightly to complex door panels and vehicle curves with ease
  • Structural damping kills unwanted sheet metal resonance caused by heavy mid bass
  • Seals cavity to drastically increase speaker bass response and clarity
  • Lowers cabin ambient noise so you hear your music instead of the highway
  • Reflects radiant heat to help keep your vehicle interior cooler
  • Simple three step peel and stick installation process makes upgrading your sound quick
  • Combine this kit with NVX SDRLR1 Rubber Roller for easy installation
  • Pack includes five 18" x 32" sheets
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Specifications:

  • Install Location: Trunk
  • Material Thickness: 0.091 (2.3 mm)
  • Amount of Material: 20 square feet
  • Material Use: Vibration Dampener
  • Optimal Performance Temperature: 14°F to 140°F
  • Rated Temperature Range: -75°F to 450°F
  • Application Temperature: 60°F to 90°F
  • Dimensions (each piece): 18"L x 32"W

Frequently Asked Questions (FAQ)


Rattles often hide in the license plate or trunk latch. Ensure the SDBTK20 is fused to the metal with an NVX SDRLR1 roller. For the plate, apply a leftover strip of NVX SDSK2 behind it to kill the vibration.
Gravity and heat require a perfect bond. Clean the metal with denatured alcohol to remove all oils. Use an NVX professional roller to press the 91mil butyl firmly; hand-pressing isn't strong enough for overhead panels.
The SDBTK20 is sized for standard trunks. For SUVs or hatchbacks, you may need more. Use this kit for the floor and lid, then add an NVX SDDK12 or extra NVX SDSK2 sheets to fully treat the large wheel wells.
Standard scissors will gum up on the thick butyl. Use a sharp NVX stainless steel utility knife and cut on the foil side. If you have gaps in tight corners, use small off-cuts from an NVX SDSK2 kit to fill them in.
No, it must bond directly to bare metal to stop vibrations. Strip the carpet, clean the metal, and roll down the SDBTK20. For maximum silence, add NVX BFK20 foam over the mat before reinstalling your factory liner.

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Specifications & Details


Sound Damping Specifications
Installation Location
Trunk
Material Thickness
0.091
Total Amount of Material
20 square feet
Material Use
Vibration Dampener
Secondary Use
Sound Absorber
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

NVX

Model Number:

SDBTK20

Weight:

18.00lbs

Internal SKU:

sdbtk20

Internal Product ID:

133809

Product and How-to Videos


  • Eliminate Shakes & Rattles in Your Vehicle With NVX Stealth Black Sound Deadening Material
  • How To Install Sound Damping in a Car | NVX Audio & Mitsubishi Evo 9
  • NVX Audio Sound Dampening | Test & Installation Demo

Customer Ratings & Reviews


NVX SDBTK20 Premium Stealth Black thumbnail image

5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
4.9
Value
5
Features
4.9
Design
5
Usability
4.8

Customer Reviews

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Excellent

This stuff is great. I was able to do my entire car with 1 package of this stuff.

By Anonymous on July 29, 2018 Checkmark Icon Verified purchase

47 found this helpful


Good stuff.

I used this product in a number of spots in my car to reduce rattles. It definitely worked as it’s supposed to. I’d recommend.

By Justin on April 27, 2018

47 found this helpful


Outstanding!!!

This has got to be the best value anywhere. I recently completed the install in my entire 94 Land Cruiser. Huge reduction in road noise and a major improvement in sound system quality. I started to notice smaller noises that I had never heard before. A significant improvement to the restoration process. The doors sound solid when closing and the door handles don't sound "tin-like" as they did before. The best improvement to a vehicle that unfortunately nobody but myself will notice, but I would do it all over again.

By Happy in TX on May 2, 2020

44 found this helpful


Really high quality mat

I was impressed with the quality of this and will definitely buy more. Forms easily and sticks very well. I like it better than the foil lined kind because I don’t have to worry about slicing my hands. Definitely can tell the difference it has made with quieting down the ride and getting rid of rattles.

By Robb on January 6, 2020 Checkmark Icon Verified purchase

47 found this helpful


Great product

This product is great, it is easy to install and works just as good if not better than the more expensive brands. Would recommend using this product.

By Steve on March 17, 2018

45 found this helpful


Soundproof Your Ride

Everyone who cares about their ears- excessive roadnoise, music, carphone, etc- should soundproof. This soundproof kit is economical, a relatively easy install, & effective.

By ken on August 21, 2022 Checkmark Icon Verified purchase

38 found this helpful


NVX Trunk Kit.

While my intention is to do my two front doors, it made more sense to purchase the large sheets. Although I have a four door SUV, the reason for this was to assure all metal was covered, as well as enough to do the plastic door skin (interior). I can't comment on durability just yet. The premium black looks simple to trace and cut. I'll add pictures as I proceed.

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By Roy on May 28, 2024 Checkmark Icon Verified purchase

12 found this helpful


The best sound deadner on the market next to the pro version!

The best sound deadner on the market next to the pro version of this by NVX. I like the pro version of this best due to it's twice as thick. Both go on extremly easy. Way easier than Dynamat and seems to have less smell, if any at all. I bought this and will not use anything else now.

By JOSHUA on May 13, 2025 Checkmark Icon Verified purchase

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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.