Sound Deadening Door Panel, Insulation for Car Doors

heat moldable sound dampener classic car

American Made Since 1985

db Defender

Quiet the Ride Without Compromising the Build.

Upgrade your vehicle with sound-deadening door panel insulation—replace the flimsy factory plastic film with a durable solution that protects against moisture while reducing road noise for a quieter, more comfortable ride.

Provides 2x the damping with less than half the weight of asphalt materials
Heat-moldable for a seamless, “dipped-in-plastic” finish on complex surfaces
Paintable surface for a clean, OEM-style appearance
Ultra-thin 0.045 in. vinyl sheet for effective vibration damping without added bulk
Proudly made in the USA for trusted automotive quality

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

250F

121 °C

Continuous

300F

149 °C

Intermittent

Instruction Sheet

Product Types

040051

1/4 in thk x 37 in x 54 in

040052

1/4 in thk x 37 in x 54 in (2 pack)

db Defender – High-Performance Door Panel Sound Deadening Material

db Defender is a lightweight, flexible sound deadening material designed for automotive door panels. Made from a proprietary vinyl blend, it stretches up to 40% to conform tightly to uneven surfaces. It delivers 2× the sound dampening with less than half the weight of asphalt-based mats. Withstands up to 250°F—ideal for daily drivers and high-performance builds. The db Shield Defender layer reduces structural resonance by converting vibration into low-level heat. Blocks airborne sound and speaker back wave to eliminate acoustic short circuits. Replaces thin factory insulation for better audio clarity and reduced road noise. Improves ride comfort while boosting sound system performance.

FAQ

How much db Shield do I need to do do my door panels?

One sheet of db Shield (P/N 040051) is enough to cover one set (2) door panels

Can I paint the db Shield after it is installed?

Yes, just clean it after installing and use a pre paint cleaner, paint will have no trouble bonding to db Shield!

How can I remove the db Shield?

To remove db Shield, grab that heat gun, start in one corner and slowly work your way out. A plastic scraper can help without damaging door panel. To remove and excess adhesive, use some good old WD-40!