The Dynamat Xtreme Sound Deadener 72 Sq. Ft. Mega Pack (SKU: 10465) is an industrial-sized, heavy-duty cabin insulation package engineered for total vehicle soundproofing projects. Containing 9 oversized, flat-format sheets, this kit covers double the surface area of a standard bulk pack. It is designed to stop large body panel vibration, block harsh freeway road noise, and uncover the true output of your aftermarket car audio system.
At 70 mph, ambient highway drone can reach 85 dB, masking a massive portion of your stereo's frequencies. By laying down a high-efficiency sonic barrier, Dynamat Xtreme restores up to 12 dB of lost dynamic range. Because a gain of just 3 dB effectively doubles your amplifier's perceived acoustic power, this kit transforms your vehicle into a quiet, luxury-car cabin environment.
Premium Constrained-Layer Engineering
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Advanced Butyl Formula: Formulated with a highly stable, elastomeric butyl-rubber core that eliminates structural vibration by converting mechanical energy into silent thermal dissipation. It contains zero asphalt fillers, meaning it will never melt, sag, run, or release foul chemical odors under extreme summer heat.
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Heavy Aluminum Constraining Skin: Shielded by an embossed, 4-mil thick aluminum layer that rigidifies the flexible butyl. This metallic skin forces underlying metal panels to resist harmonic flexing while providing effective radiant heat insulation for car floors and roofs.
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No-Heat Flexibility: Highly malleable and easy to stretch, allowing each large sheet to conform over deep trunk pans, transmission tunnels, structural ribs, and inner door cavities without requiring pre-heating with a heat gun.
Complete Vehicle Project Real Estate
With 72 square feet of coverage, this industrial package provides more than enough material to complete full-vehicle builds, including:
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Full-Floor & Firewall Coverage: Insulates the entire floor layout from the high firewall down through the cabin pans and up the rear seat kickboard.
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Complete Trunk Compartment: Encloses the rear package shelf, deep trunk floor pan, spare tire well, and outer quarter panel skins to isolate exhaust and fuel pump hum.
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Multi-Door Optimization: Easily covers both the inner structural frame and outer door skins across 2-door or 4-door vehicles, locking in clean mid-bass performance.
Technical Specification Matrix
| Feature Metric |
Specification Detail |
| Manufacturer |
Dynamat |
| Product Series |
Dynamat Xtreme Mega Pak |
| Part Number / SKU |
10465 |
| Total Kit Coverage Area |
72 Sq. Ft. ($6.69\text{ m}^2$) Total |
| Sheet Breakdown |
Nine (9) Large Flat Sheets |
| Sheet Dimensions |
24" x 48" (609mm x 1219mm) Per Sheet |
| Material Base |
High-Acoustic Constrained Butyl-Rubber |
| Outer Facing Finish |
4-Mil Thick Embossed Aluminum Shield |
| Installation Method |
Pressure-Activated Self-Adhesive Peel-and-Stick |
Instructions
š ļøĀ Installation Best Practice: For optimal metal adhesion, wipe the target body sheet metal with a fast-evaporating solvent like denatured alcohol to lift away factory grease, old adhesive, or wax before applying. To secure a permanent, bubble-free mount, peel back the release liner and work the mat into complex body ribs using a solid rubber or wooden application roller tool.
