Sundown Audio 80 mil Sound Deadener 15 Sheets 4.0mm Damping Kit

• High Density Acoustic Control: Premium 80mil / 190mil composite construction with 4.0mm thickness effectively reduces vibration, panel resonance, and unwanted road noise for cleaner, more accurate sound performance
• Competition Grade Performance: Designed for serious car audio systems including SPL builds, subwoofer enclosures, and high output door setups where maximum damping and structural reinforcement are critical
• Large Coverage Pack: Includes 15 sheets measuring 10 inch x 20 inch each, providing approximately 20.8 square feet of coverage, ideal for doors, trunks, floors, roofs, and full vehicle treatments
• Strong Self Adhesive Backing: Sundown reinforced adhesive with upgraded thermal bonding ensures secure installation, long term durability, and reliable performance in high temperature automotive environments
• Improves Bass Response and Clarity: Helps seal panels and reduce energy loss, allowing subwoofers and speakers to perform more efficiently with tighter bass, improved midbass impact, and reduced rattles

Sundown Audio 80 mil Sound Deadener 15 Sheets 4.0mm Damping Kit

This Listing Includes:

• (1) Box of 15 Sheets Sundown Audio Sound Deadener

Take your build to the next level with the Sundown Audio Premium 80mil Sound Deadener, engineered to eliminate vibration, reduce road noise, and dramatically improve overall audio performance. Designed for serious car audio enthusiasts and competition-level systems, this high-density damping material attacks resonance at the source, creating a quieter cabin and tighter bass response.

Built with a dense, soft bitumen layer combined with a high-mass composite structure, this 4.0mm-thick material delivers exceptional low-frequency absorption and structural reinforcement. Sundown’s enhanced quality control, upgraded thermal bonding, and reinforced adhesive backing ensure long-term durability and reliable installation in demanding environments.

Whether you are sealing a trunk for subwoofers, reinforcing doors for midbass performance, or treating an entire vehicle for SPL competition, this premium deadener provides the solid acoustic foundation needed for elite sound reproduction.

Specifications:

• Thickness Rating: 80mil Composite


• Material Thickness: 4.0mm


• Sheets Per Box: 15


• Sheet Size: 10 inches x 20 inches


• Total Coverage: Approximately 20.8 square feet


• Color: Matte Black


• Adhesive: High strength self adhesive backing


• Weight: 34 lbs per box


• Application: Automotive panels, doors, trunks, floors, roofs, and enclosures

Dimensions:

• Sheet Size: 10 inches x 20 inches each


• Total Coverage Area: ~20.8 sq ft per box


• Package Weight: 21 lbs

Accepted Payment Methods at Big Jeff Audio

At Big Jeff Audio, we strive to make your shopping experience as smooth as possible by offering a wide variety of payment options. Below is a complete list of the payment methods we accept:

Credit and Debit Cards

• Visa
• Mastercard
• American Express
• Discover
• Diners Club

Digital Wallets

• Amazon Pay
• Apple Pay
• Meta Pay (formerly Facebook Pay)
• Google Pay
• Shop Pay
• PayPal

International Payment Methods

• Bancontact
• iDEAL

Bank Transfers

• Zelle

Financing Options

We also offer financing options to make purchasing easier. Learn more about our financing options here.

• Klarna
• Affirm
• Sezzle
• Snap
• Acima
• Tiptop

If you have any questions or need assistance with payments, feel free to reach out to us at info@bigjeffaudio.com or call us at 737-BIG-JEFF.

Shipping Options and Delivery Time

Do You Offer Expedited Shipping?

Yes! At checkout, you can select from different shipping options:

• Standard Shipping: Free for orders over $100.
• Expedited Shipping: Available at an additional cost, calculated based on the weight and destination of your order.

How Long Does Delivery Take?

• Handling Time: Most orders are processed and shipped within 1 business day after receiving cleared payment. Occasionally, additional handling time may be required, but we’ll notify you if that’s the case.
• Standard Shipping: Typically takes 3-5 business days, though delivery may be affected by extreme weather or holidays.

What Happens If My Package Is Undeliverable?

If your package is refused or marked undeliverable and returned to us by the carrier, you’ll need to pay the full shipping cost to have the package resent. Alternatively, we can refund your order, minus the cost of shipping.

Why Can’t I Track My Order?

If you're having trouble tracking your order:

• Make sure you’ve received the shipping confirmation email with the tracking number.
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• If the issue persists, please refer to our detailed guide on tracking your order or contact our customer service team for further assistance.