Sky High Car Audio 120Mil Sound Deadener ( Single Sheet )

Sky High Car Audio 120Mil Sound Deadener Butyl Sheets 16.5-99 sq ft are built to reduce panel vibration, road noise, heat soak, and unwanted rattles in serious car audio installs.

Sold by AudioSellerz.com, this Sky High Car Audio 120mil sound deadener is made for doors, floors, roof panels, trunks, firewalls, hatch areas, rear decks, and other vehicle panels that need better damping and control. If you are building a louder subwoofer system, upgrading mids and highs, reducing road noise, or trying to make the vehicle feel more solid, this aluminum-backed butyl sound deadening mat is a strong upgrade.

Good sound deadener helps more than just rattles. It can reduce panel resonance, control vibration, lower road noise, and help the vehicle sound tighter when the bass hits. The 120 mil thickness gives this material serious damping ability without going as heavy as the thickest deadener options, making it a strong choice for daily drivers, demo builds, door treatments, trunks, roofs, floors, and full vehicle coverage.

120Mil Butyl Sound Deadener for Car Audio Builds

This 120mil sound deadening mat uses a nominal thickness of 120 mil, equal to 0.120" or about 3 mm total thickness. That gives the material a heavy-duty feel for vibration control, sound damping, and vehicle panel treatment.

When installed on properly prepped metal surfaces, this material helps tame buzzing, ringing, and flex from subwoofers, midbass speakers, road vibration, and general vehicle noise. If you are putting together a complete bass system, the Audio Sellerz complete car audio bass setup guide is a helpful read for understanding how subs, boxes, amps, wiring, and vehicle prep work together.

6 Mil Aluminum Top Layer for Sound and Heat Control

The 6 mil aluminum layer helps reduce sound transfer and heat soak inside the vehicle. That makes this deadener useful not only for vibration damping, but also for areas exposed to radiant heat such as floors, firewall areas, trunk panels, and roof sections.

The aluminum top layer also helps add stiffness to treated panels, while the butyl backing helps absorb and damp vibration. Together, they create a strong combination for car audio builds that need both sound control and better vehicle comfort.

Super Sticky Butyl Rubber Adhesive

This Sky High 120mil deadener uses a high-tack butyl rubber adhesive backing designed to bond strongly to properly cleaned metal surfaces. When installed correctly, the material is made to stay in place without slipping, peeling, or coming loose during normal use.

Surface prep matters. Always remove dust, grease, oil, moisture, loose material, and old adhesive before applying deadener. Warming both the vehicle panel and the mat can help improve flexibility and adhesion, especially in cold weather.

Premium Black Foil Finish

The thick black foil face with metallic blue and purple Sky High logos gives the material a clean, professional look if it is visible in the install. That makes it a good choice for exposed trunk builds, amp rack areas, show vehicles, hatch areas, and custom panels where appearance still matters.

If you are building a full Sky High setup, you can shop more Sky High Car Audio products to match your sound deadener, wire, amplifiers, speakers, terminals, RCA cables, and install accessories.

Convenient Sheet Size

Each sheet measures 23.5" x 11", making the material easy to fit into door skins, trunk floors, rear decks, roof sections, quarter panels, hatch panels, and tight spaces without excessive waste.

The sheet size is large enough for good coverage but still manageable for curved panels, corners, and smaller install areas. That helps make installation easier whether you are treating one problem area or laying down coverage across a larger section of the vehicle.

Flexible Pack Options

This Sky High 120mil sound deadener is available in pack sizes from 16.5 square feet up to a 99 square foot mega bulk pack, giving you options for small installs, partial treatments, or full vehicle deadening projects.

• Smaller packs are great for doors, license plate areas, trunk lids, or targeted rattle control
• Medium packs are useful for trunks, floors, rear decks, hatch areas, and multi-panel coverage
• Large bulk packs are ideal for full demo builds, full interiors, and bigger car audio projects

Perfect For

• Car audio sound deadening
• Door sound deadener installs
• Trunk rattle reduction
• Roof panel damping
• Floor and firewall sound control
• Rear deck vibration reduction
• Hatch and liftgate vibration control
• Subwoofer rattle control
• Road noise reduction
• Heat soak reduction
• Daily driver audio builds
• Demo vehicles and loud bass systems
• Show-quality car audio installs

Quick Details

• Brand: Sky High Car Audio
• Product type: Aluminum-backed butyl sound deadener sheets
• Nominal thickness: 120 mil
• Total thickness: 0.120", about 3 mm
• Aluminum layer: 6 mil
• Adhesive: Super sticky butyl rubber adhesive
• Finish: Thick black foil with metallic blue and purple Sky High logos
• Sheet size: 23.5" x 11"
• Density: Just under 1 lb per square foot
• Pack options: 16.5 sq ft up to 99 sq ft mega bulk pack
• Best use: Doors, floors, roof panels, trunks, firewalls, rear decks, hatch areas, and vibration-prone vehicle panels

Helps Improve Sound Quality and Vehicle Feel

When vehicle panels flex and vibrate, music can sound loose, harsh, or uncontrolled. Adding automotive sound deadening material to the right areas can help reduce those problems and make the system feel more solid.

Doors can benefit from better midbass control and reduced metal vibration. Trunks and hatches can benefit from reduced bass rattles. Floors, roofs, rear decks, and firewall areas can benefit from reduced resonance, road noise, and heat transfer. This makes 120mil deadener a useful upgrade for both sound quality builds and loud bass builds.

Installation Tips

• Thoroughly clean the mounting surface before applying the deadener
• Remove dust, oil, grease, wax, moisture, and loose material
• Heat both the metal surface and the sound deadening mat before installation for better flexibility and adhesion
• Apply firm pressure across the entire sheet
• Use a roller when possible to remove air pockets
• Make sure the material has full contact with the panel
• Focus first on high-rattle areas like doors, trunks, rear decks, hatches, roof panels, and firewall sections

Pair It with the Right Car Audio Build

This Sky High 120mil sound deadener fits naturally into builds using upgraded subwoofers, mids and highs, amplifiers, wiring, amp kits, and electrical upgrades. Better vehicle treatment can help reduce the rattles and resonance that take away from an otherwise strong sound system.

If you are also planning power wire, fuse protection, batteries, or amplifier wiring, the Audio Sellerz car audio wire gauge and fuse guide can help you plan the electrical side before finishing the install.

Heavy-Duty Deadener for Cleaner, More Controlled Sound

The Sky High Car Audio 120Mil Sound Deadener Butyl Sheets are a strong choice for customers who want better vibration control, reduced road noise, less panel resonance, lower heat transfer, and a cleaner overall car audio install.

For shoppers searching for 120mil sound deadener, butyl sound deadener, car audio sound damping sheets, door sound deadener, trunk sound deadener, or automotive vibration dampening material, this Sky High deadener is built to help lock in your sound and cut down on unwanted heat and noise.