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NVX SDBPRO20 PRO Stealth Black

177 mil 20 sq ft Ultra Thick Full Car Sound Deadening Kit (Five 18" x 32" Sheets) - Black

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• 20 square feet ultra thick sound deadening kit
• Solid black design for any stealth car audio installation
• Material Used: Vibration Dampener
• Material Thickness: 0.17"
• Install Location: Entire Vehicle
• Pack includes five 18" x 32" sheets

Learn more about the sdbpro20
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List price $143.99
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Product Highlights


• 20 square feet ultra thick sound deadening kit
• Solid black design for any stealth car audio installation
• Material Used: Vibration Dampener
• Material Thickness: 0.17"
• Install Location: Entire Vehicle
• Pack includes five 18" x 32" sheets

Description


NVX brand icon

Authorized dealer

NVX Ultra Thick Sound Dampening Material

Achieve the ultimate in sound insulation with NVX Ultra Thick Sound Dampening material, designed for those who demand maximum noise control and vibration reduction. At 4.5mm thick—more than twice the thickness of standard dampening materials—this product provides unparalleled soundproofing for your vehicle. Our advanced formulation not only blocks road noise but also absorbs vibrations with up to 70% greater effectiveness, resulting in a quieter, more immersive driving environment. Ideal for SPL competitors and high-impact applications, NVX Ultra Thick reduces unwanted panel flex, enhances audio clarity, and enables higher SPL levels without distortion. Perfect for areas such as doors, floors, and trunks, this material delivers a durable, easy-to-apply solution for those seeking the very best in sound quality and control.

Product Details:

  • 20 square feet ultra thick sound deadening kit
  • Solid black design for any stealth car audio installation
  • Offers more than twice the thickness of standard dampening material for superior noise and vibration control
  • Up to 70% improvement in noise reduction, creating a quieter cabin environment
  • Around 60-70% better vibration control, eliminating unwanted rattling and sound distortion
  • Up to 50% enhanced thermal insulation, helping regulate cabin temperature
  • Maximizes SPL output by reducing panel flex, directing sound pressure for higher decibel levels
  • Minimizes distortion for clear, intense audio performance
  • Made from 100% Butyl Rubber for durability and long-lasting performance
  • Ideal for high-impact applications, including doors, roof, floor, and trunk
  • Enhances car audio sound quality by creating a sealed, soundproof environment
  • Stops rattles, increases SPL, and minimizes heat
  • Conforms to complex vehicle contours
  • Sturdy peel-and-stick aluminum backing for easy installation
  • 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: Entire Vehicle
  • Material Thickness: 0.17" (4.5 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)


At 4.5mm, this material is heavy. If the surface isn't prepped with a wax/grease remover, the weight will pull it down. For complex curves, use a heat gun to soften the butyl, making it more pliable to hug the contours of your vehicle.
Yes, trapped air reduces effectiveness. Because the NVX SDBPRO20 is so thick, hand-pressing isn't enough. You must use a heavy-duty rubber roller like the NVX SDRLR1 to move air from the center to the edges for a 100% bond.
Standard scissors struggle and get gummed up. Use a fresh utility knife with a metal straight edge. Cut on the foil side first for best results. Keeping NVX SDBPRO20 cool before cutting helps prevent butyl from sticking to the blade.
Stacking isn't recommended due to the 4.5mm thickness. Instead of double-layering, ensure 100% surface coverage. If you have extra gaps, use the NVX SDST3 Butyl Tape to seal the seams where the sheets meet to prevent any sound leakage.
This is "Ultra Thick" material. Check for interference with door clips or window tracks. Trim the NVX SDBPRO20 at least 1 inch away from any clip holes or moving parts. A precision trim ensures the panel seats correctly while still killing the vibration.

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Specifications & Details


Sound Damping Specifications
Installation Location
Entire Vehicle
Material Thickness
0.17"
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:

SDBPRO20

Weight:

30.00lbs

Internal SKU:

sdbpro20

Internal Product ID:

202875

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 SDBPRO20 PRO Stealth Black thumbnail image

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



Durability
5
Value
5
Features
5
Design
5
Usability
5

Customer Reviews

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The best sound deadner I have found next to Second skin!

I love this double thick deadner,it's like the Second Skin brand,but cheaper in price. Really heavy and helps stop rattle,and deadens road noise better than regular deadner. I'll keep buying this and the NVX silver deaner is thinner for places ths is too thick.

By JOSHUA on September 1, 2025 Checkmark Icon Verified purchase

1 found this helpful


Great Product Highly Recommend

I used the NVX SDBTK20 (91 mil) on my previous truck and just used the Ultra Thick SDBPRO20 (4.5 mm) on my Ranger Raptor. Over twice as thick and does a great job. Applied easily and definitely gives the doors a solid feel.

By Tom on February 23, 2026 Checkmark Icon Verified purchase


NVX thick sound deadener

This pack of sound deadening sheets is thicker and helps stop the vibration from my system. I would definitely recommend this pack of deadener if your trying to find something to stop the vibration and rattles. Good price for what it does!

By Jordan on November 14, 2025 Checkmark Icon Verified purchase
2016 Jeep Grand Cherokee


Super thick

Nvx sound deadener ranks close to the top. This stuff is super thick

By Brent on September 27, 2025 Checkmark Icon Verified purchase




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