Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
DEI Boom Mat XL vibration damping material, two 12.5" x 24" sheets (4.2 sq. ft.) at 4mm thickness, reduces interior panel vibration and noise. Asphalt-free pure butyl core with a stiff 4 mil aluminum top skin traps sound and needs only 25–50% coverage for effective damping. No-snag adhesion, minimal prep, and reliable performance across extreme temperatures make it suitable for stereo upgrades and quieting projects.
DEI XL Damping Material 12.5in x 24in x 4mm
