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.
