The Dynamat Xtreme Sound Deadener 4 Sq. Ft. Hex Pack (SKU: 10425) is a compact, single-sheet utility kit designed for targeted acoustic treatments and spot-insulation projects. Containing one premium-grade 18" x 32" sheet, this pack is the ideal choice when you need a little extra material to complete a larger installation, or when you want to isolate localized rattles, harmonic vibrations, and resonance in specific body panels. By converting mechanical vibration into silent thermal energy, this self-adhesive sheet helps eliminate unwanted cabin noises, stabilizes structural sheet metal, and enhances the performance of individual car audio components. Advanced Elastomeric Spot-Damping Patented Butyl Formulation: Features an advanced, highly sticky butyl-elastomeric core that remains exceptionally stable across extreme temperature swings. Unlike cheap asphalt-based alternatives, it will not melt, sag, run, or release unpleasant chemical odors when exposed to high automotive heat. 4-Mil Aluminum Constraining Layer: Covered by a durable, embossed aluminum skin that rigidifies the flexible butyl. This metallic layer forces the underlying panel to resist flexing while acting as a targeted radiant thermal barrier. No-Heat Conformability: Highly malleable and easy to work with. The material smoothly contours over complex body lines, structural metal ribs, inner door frames, or contoured trunk panels without requiring pre-heating with a hot rod style heat gun. Ideal Target Applications This 4 square foot utility sheet provides the perfect amount of coverage for targeted problematic areas, such as: License Plate & Trunk Lid Damping: Stops annoying license plate buzz or trunk skin trunk rattle caused by high-powered car subwoofers. Single Speaker Isolation: Seals and reinforces a single high-output door speaker or rear package tray speaker mount to maximize mid-bass punch. Component-Specific Spot Fixes: Perfect for lining the underside of a rattling transmission tunnel, patch-welded floor sections, or stabilizing custom center console enclosures. Technical Specification Matrix Feature Metric Specification Detail Manufacturer Dynamat Product Series Dynamat Xtreme Hex Pak Part Number / SKU 10425 Total Kit Coverage Area 4.0 Sq. Ft. Total Sheet Breakdown One (1) Single Sheet Sheet Dimensions 18" x 32" (457mm x 812mm) 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 🛠️ Installation Best Practice: To ensure a permanent bond, completely scrub the target metal surface with a fast-evaporating solvent (like denatured alcohol) to strip away any residual grease, road wax, or dust before applying. Press the mat down firmly using a solid rubber or wooden application roller tool to completely flatten out air pockets and activate the specialized adhesive.
