Audi A6 C6 Rear Wheel Arch Sound Deadening & Rust Fix

Audi A6 C6 Rear Wheel Arches Sound Deadening & Anticorrosion

Improve your Audi A6 C6’s cabin comfort and longevity with this DIY sound deadening and anticorrosion treatment for the rear wheel arches.

🔧 What You’ll Do:

• Reduce road and tire noise

• Prevent further rust damage
• Improve driving comfort and vehicle longevity if done correctly ( make sure there won't be any places that water will stay in place causing corrosion! )

🛠️ Tools & Materials I Used:

• Alubutyl mats: STP Silver 1.8mm for driver side, 2.5mm mat for passenger
• Sound deadening foam sheets: 6mm and 25mm acoustic foam ( closed cell, so it won't be like a sponge for water )
• Roller (long handle) for pressing mats
• Utility knife, measuring tape
• Protective gloves (sharp metal inside the doors)

💡Important:

Do not close / cover technological holes or water drains!

🛠️ Step-by-Step:

1. Take off arch linings
2. Apply sound deadening material to the arch linings for noise reduction, place it somewhere to dry for some hours.
3. Inspect rear wheel arches for signs of rust or wear.
4. Mechanically remove rust with a wire brush or drill attachment.
5. Apply epoxy paint to clean areas for durable protection.
6. For tight, hard-to-reach rusty spots, use penetrating anticorrosive treatment.
7. Let it dry for time specified by anticorrosive stuff manufacturer
8. Clean and degrease the surface with e.g. isopropyl alkohol or similar
9. Apply alubutyl mats pieces and use roller to press mats firmly
10. Clean and degreese again.
11. Apply sound deadening foams on the mats.

💡 Pro Tip:

Addressing corrosion early saves you from costly repairs later, and soundproofing gives you a more refined driving experience.

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