Premium Soundproofing
for
True Sound Quality Lovers

Turn flimsy, buzzy doors into a crisp, clear front stage. We use lightweight, non-bitumen STP layers to kill resonance, seal service holes, and decouple the trim—so vocals snap into focus and mid-bass hits without buzz. Installs from 1 day.

Premium — STP Silver Line
Best for: Daily comfort & first SQ upgrade
Includes:

• STP Silver on inner/outer skins (targeted coverage)
• Service-hole alloy plates for a semi-sealed door
• Trim decoupling for rattle-free panels
• Result: Noticeably less rattle/hollow echo; tighter mid-bass and clearer mids.

Premium+ — STP Gold Line
Best for: Touring & serious audio listeners
Includes:

• STP Gold (higher damping, wider coverage)
• Sealing + acoustic foam decoupler around speakers and trim
• Basic thermal liner to tame summer heat bleed
• Result: Deeper, cleaner mid-bass, lower road noise, smoother vocals at volume.

Ultimate — STP Diamond Line
Best for: SQ builds & high-power front stages
Includes:

• STP Diamond (maximum damping, full door treatment)
• Multi-layer stack: vibration damper → acoustic foam → barrier/thermal layer
• Speaker mount sealing & anti-squeak detailing for wiring/clips
• Result: Studio-like door “enclosure”: fast, controlled bass, laser-clear mids, minimal external noise.

Notes:

• Lightweight approach—no hinge strain.
• Non-bitumen, low-odour, water-resistant adhesives.
• Standard scope: front doors (rear doors optional).
• Ready for crisp, clean doors? Tell us how quiet and how cool you want it—Premium | Premium+ | Ultimate—and we’ll match the package to your budget and build.

AcousticShellPro — Full-Body Treatment for Sound Quality (SQ)

Turn your car into a quiet, controlled listening room.
AcousticShellPro is our full-body soundproofing and acoustic treatment designed for SQ lovers who want tighter bass, clearer mids, and a stable soundstage—without loading the car with unnecessary weight.

The Pains We Fix

• Weak bass & muddy mids because doors leak air and panels flex.
• Rattles & buzzes from doors, dash, boot and tailgate that ruin music.
• Harsh road/tyre roar and engine/floorpan drone masking detail.
• Roof shimmer & echo that smear vocals and cymbals.
• Unbalanced cabin acoustics—center image wanders, stage collapses at speed.

What You’ll Hear Immediately

• Real bass punch and faster transients from properly sealed, rigid doors.
• Clean midrange & vocals—less masking, more texture.
• Stable stereo image with wider stage and stronger center lock.
• Quieter background: less roar, hiss and resonance = more music.
• Zero-rattle cabin that feels solid and premium.

What We Treat (Full-Body Coverage)

• Doors (outer/inner skins + service holes) → sealed speaker enclosures.
• Floor & tunnel / firewall → kills drone and low-freq smear.
• Rear wheel arches & quarter panels → stops boom from the back.
• Boot/tailgate (including number-plate area) → ends creaks and echo.
• Roof skin → reduces rain drum and high-freq shimmer.
• Select pillars & trims → decouple to prevent re-radiation.

1. How We Do It (3-Layer Method, Lightweight Spec)
2. Vibration Damping (STP products, non-bitumen): Targets panel resonance and the “drum” effect.
3. Sealing & Reinforcement (aluminium-backed panels): Closes service openings; creates a rigid baffle for speakers.
4. Acoustic Absorption/Decoupling (closed-cell & absorbers): Blocks airborne noise and stops trim buzz.

Materials are high-temp, odorless, and chosen to suit Australian heat. Factory drainage, wiring, airbags and service access remain intact.
Designed for SQ, Mindful of WeightWe use non-bitumen, high-performance materials and strategic coverage. Doors typically add only a small, controlled weight increase; full-body mass is tailored per model to protect hinges, struts and handling.