vibration damping material
DEI 50221
butyl sound dampening mat
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DEI XL Damping Material 12.5in x 24in x 4mm

DEI
DEI50221
607078502216
Thermal Wrap
12 Units In Stock - Ships Next Business Day
Cooling, DEI, Engine, Thermal Wrap
$ 62.05
$ 62.05

SKU: 50221 Β  | Β  UPC: 607078502216


DEI Boom Mat XL Vibration Damping Material – 12.5" x 24" x 4mm (4 sq. ft. Kit)

The DEI Boom Mat XL Vibration Damping Material is a premium, high-performance sound deadening solution designed for serious noise control in vehicles, boats, RVs, and commercial applications.

This 4mm thick, asphalt-free butyl rubber damping material features a thick 4-mil aluminum constraining layer that dramatically reduces vibrations, road noise, and panel resonance.

Unlike cheaper damping materials, Boom Mat XL requires only 25–50% surface coverage to achieve excellent results, saving weight, time, and money. Its superior adhesion works on vertical and overhead surfaces, even in extreme temperatures, making it the go-to choice for audio enthusiasts, custom car builders, and anyone seeking a quiet, comfortable interior.

Key Features

  • 4mm Thick Pure Butyl Layer – Superior vibration damping and noise reduction
  • 4-Mil Aluminum Constraining Layer – Stiffens panels and traps noise effectively
  • Excellent Adhesion – Bonds securely to any clean surface, including vertical and overhead panels
  • Extreme Temperature Performance – Maintains effectiveness in both hot and cold environments
  • Lightweight & Efficient – Only 25–50% coverage needed for maximum results
  • Easy Peel Plastic Liner – No tearing or frustration during installation
  • Enhances Stereo Performance – Reduces road and panel noise for clearer, richer sound
Spec Detail
Part Number 50221
Brand DEI (Design Engineering Inc.)
Product Name Boom Mat XL Vibration Damping Material
Sheet Size 12.5" x 24" (each sheet)
Thickness 4mm
Total Coverage 4 sq. ft. (2 sheets)
Material Pure Butyl Rubber + 4-mil Aluminum
Adhesive High-Tack, No-Snag Formula
Color Black with Silver Aluminum Top
Country of Origin United States
Warranty DEI Limited Warranty

Whats Included

  • Two 12.5" x 24" Sheets of Boom Mat XL (4 sq. ft. total)
  • Easy-peel plastic release liner
  • Installation instructions

Product Notes

  • Universal fit works on cars, trucks, boats, RVs, and any interior panels
  • Best used as the first layer before adding mass-loaded vinyl or carpet
  • Professional installation recommended for optimal coverage and results

Installation Notes

  • Clean surface thoroughly before application
  • Peel liner and press firmly into place (roller recommended)
  • Estimated time: 30–90 minutes depending on area
  • No special tools required

This Part Fits

Application Notes
Universal Fits any vehicle – doors, floors, roof, trunk, firewall, etc.
Automotive Cars, trucks, SUVs, and custom builds
Marine & RV Boats, RVs, and recreational vehicles
Commercial Sound competition and professional audio installations

Why Choose DEI Boom Mat?

  • Industry-leading vibration damping performance
  • Requires less material than competing products for the same results
  • Proven in demanding commercial and sound competition environments
  • Trusted by professional installers and car audio enthusiasts worldwide

Frequently Asked Questions

  • Q: How much coverage do I need?
    A: Only 25–50% coverage is typically required for excellent noise reduction.
  • Q: Can I install this myself?
    A: Yes, it’s designed for easy DIY installation with minimal tools.
  • Q: Is this better than cheaper damping mats?
    A: Yes, Boom Mat uses a thicker 4mm pure butyl layer and a stronger aluminum constraining sheet for superior performance.
  • Q: Will this improve my stereo sound?
    A: Yes, by reducing panel vibration and road noise, your audio system will sound clearer and more dynamic.

Shipping & Handling

  • Method: Ground UPS or FedEx
  • Availability: In stock – ships same or next business day
  • Packaging: Secure DEI retail packaging

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