Acoustic Treatment by Radio Waves, Gqeberha
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Acoustic treatment ·

Kill the rattles. Hear the music.

Damping material on the doors and panels that cuts road noise, eliminates rattles and tightens up the bass — for a quieter cabin and a system that sounds cleaner and louder.

Book a fitment ↗ Learn more
Silent Coat · professionally applied Doors · Floor · Boot · Arches · Roof
Where it goes

Treated where it counts.

We target the panels that make the biggest difference to noise and sound quality.

Doors

The single biggest win — turns thin doors into solid speaker enclosures.

Floor & Boot

Cuts tyre roar and drivetrain drone for a calmer cabin on the open road.

Wheel Arches

Knocks down the stone and tyre noise that comes up through the arches.

Roof

Reduces heat and the drumming of rain and wind on the roof skin.

Bulkhead

Blocks engine noise from leaking into the cabin.

Rattle Hunting

We chase down and fix the specific buzzes and rattles that annoy you.

The Silent Coat system

A layered acoustic & thermal solution.

We offer acoustic and thermal insulation solutions for classic, commercial and private car, van, 4×4, motorhome and specialist automotive markets.

Noise Isolator

Closed-cell foam · 2-layer

A noise and thermal isolation material made using special closed-structure foam technology. Best used together with Silent Coat deadening mat as a two-layer solution to reduce and absorb airborne noise. Installed on the side panels and floor to keep road noise out and insulate the cabin.

Sound Absorber

Memory foam · high & mid

A semi-open-cell polyurethane memory foam with a special formulation for superb sound absorption and flexibility. Designed primarily to absorb unwanted high and mid-range frequencies. Installed on the interior side panels and roof to prevent echo and reverb and absorb high-frequency road noise.

Sound Deadening

Silent Coat mats

With high-grade construction and highly effective damping, Silent Coat mats are the choice of many restoration professionals. Installed on internal metal panels to absorb and reduce vibrations, rattles and road rumble.

Acoustic Treatment Sound Deadening in the Eastern Cape
Acoustic treatment ·

Kill the Rattles. Hear the Music.

Also coveredSilent CoatClosed-cell foamAnti-rattleDoor speaker ringsBoot builds
How it works

Strip, treat, seal.

A methodical process that leaves your car quieter and your audio tighter.

01

Strip

Door cards and trim removed to expose the panels.

02

Treat

Damping applied to the right areas for full coverage.

03

Seal

Gaps and access holes sealed to stop noise leaks.

04

Reassemble

Trim refitted, tested and handed back rattle-free.

Common questions

Acoustic Treatment — FAQ.

The questions we're asked most.

What is sound deadening?+
It’s a damping material applied to your doors and panels that reduces vibration. That cuts road noise, eliminates rattles, and lets your speakers play cleaner and louder.
Does it really make a difference?+
Yes — it’s one of the most noticeable upgrades you can do. Doors feel solid, the cabin is quieter, and the bass tightens up considerably.
Will it stop all road noise?+
It significantly reduces noise rather than eliminating it entirely. Treating more areas (floor, boot, arches) brings the cabin progressively quieter.
Does it add much weight?+
Modern damping like Silent Coat is effective in thin layers, so the weight added is modest for the benefit you get.
Which areas matter most?+
Doors give the biggest improvement for audio, while the floor, boot and arches do the most for road noise. We’ll recommend a package to suit your goals and budget.

Quiet it down.

Book sound deadening at our Newton Park workshop for a quieter cabin and tighter sound.

Call 041 365 0680 ↗