Close-up of two-layer black foam soundproofing material showing a wave texture, highlighting 15mm thickness and effective sound absorption and squeak elimination with Sound Absortion StP Biplast Wave 15mm. Sound Absortion StP Biplast Wave 15mm purple foam panel installed on a car door interior for enhanced sound absorption and noise reduction in automotive applications. Black and gold boxed package of Sound Absortion StP Biplast Wave 15mm with noise reduction solutions, weighing 1.5 kg and containing 7 sheets for car soundproofing. Sound Absortion StP Biplast Wave 15mm sheet in purple with textured surface, designed for effective car soundproofing, noise reduction, and vibration damping applications. Sound Absortion StP Biplast Wave 15mm sheet installed on a car roof interior, designed for effective automotive sound deadening and vibration damping to reduce road noise.
Close-up of two-layer black foam soundproofing material showing a wave texture, highlighting 15mm thickness and effective sound absorption and squeak elimination with Sound Absortion StP Biplast Wave 15mm.
Sound Absortion StP Biplast Wave 15mm purple foam panel installed on a car door interior for enhanced sound absorption and noise reduction in automotive applications.
Black and gold boxed package of Sound Absortion StP Biplast Wave 15mm with noise reduction solutions, weighing 1.5 kg and containing 7 sheets for car soundproofing.
Sound Absortion StP Biplast Wave 15mm sheet in purple with textured surface, designed for effective car soundproofing, noise reduction, and vibration damping applications.
Sound Absortion StP Biplast Wave 15mm sheet installed on a car roof interior, designed for effective automotive sound deadening and vibration damping to reduce road noise.

Sound Absortion StP Biplast Wave 15mm

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Color: Purple
$209.99 -100%
$209.99
Tax included.

StP Biplast 15 Wave – Acoustic Foam for Car Sound Absorption & Anti-Squeak Australia

Looking for a soft, high-performance acoustic foam to eliminate interior noise and panel squeaks?

StP Biplast 15 Wave is a premium automotive sound absorption foam designed to reduce airborne noise, eliminate rattles, and improve overall cabin comfort.

Its unique wave-pattern surface increases sound absorption efficiency compared to standard flat foam — making it one of the most effective car acoustic foams in Australia.

What Is StP Biplast 15 Wave?

StP Biplast is an open-cell polyurethane acoustic foam used as a finishing layer in soundproofing systems. It absorbs sound waves, reduces echo, and eliminates noise caused by panel contact.

This makes it ideal for interior trim treatment and acoustic tuning.

Why Wave-Pattern Foam Works Better

Unlike flat foam, the wave structure:

  • Increases surface area
  • Traps sound waves more effectively
  • Improves sound absorption performance

This results in better noise reduction and acoustic control inside the cabin.

What Problems Does It Solve?

  • Interior squeaks and rattles
  • Plastic panel vibration noise
  • Echo and hollow cabin sound
  • Poor acoustic comfort

Perfect for both DIY fixes and professional builds.

How Much Coverage Do You Get?

One pack (7 sheets, 1.3 m² total coverage) is enough to:

  • Treat all four doors (plastic trims)
  • Cover half of the roof / headliner
  • Apply to dashboard and interior panels

Where to Use StP Biplast

  • Door cards and interior trims
  • Roof / headliner
  • Dashboard and centre console
  • Plastic panels and clips

Important: Install only on top of a vibration damping layer.

Why StP Biplast Works

  • Open-cell foam absorbs airborne noise
  • Wave-pattern surface improves efficiency
  • Self-adhesive backing for easy installation
  • Flexible material for complex shapes
  • Resistant to extreme temperatures (–40°C to +100°C)

This makes it one of the most effective anti-squeak and acoustic foam solutions.

Performance Benefits

  • Eliminates interior rattles and squeaks
  • Improves cabin sound quality
  • Reduces echo and hollow noise
  • Enhances premium feel of the interior

Installation Guide

  • Clean surface (metal or plastic)
  • Install vibration damping layer first
  • Cut foam to size
  • Peel backing and apply evenly
  • Press gently for full adhesion

Works best at temperatures above +15°C.

Technical Specifications

  • Sheets: 7
  • Sheet size: 375 × 500 mm
  • Thickness: 15 mm
  • Total coverage: 1.3 m²
  • Material: Open-cell polyurethane foam
  • Temperature range: –40°C to +100°C

Biplast vs Other Materials

  • Accent: thinner absorption + heat insulation
  • Intrigo: structural absorption layer
  • Biplast: maximum softness + anti-squeak + acoustic tuning

Choose Biplast when you need maximum interior comfort and noise elimination.

How to Use in a Sound Deadening System

  • Step 1: Vibration damping (StP Gold / Aero)
  • Step 2: Sound insulation layer
  • Step 3: Biplast (final acoustic foam layer)

This creates a quiet, refined, and premium interior.

FAQ

Is Biplast good for fixing rattles?

Yes — it is one of the best materials for eliminating interior squeaks and panel noise.

Can I install it without damping?

No — it works best as a finishing layer over vibration damping materials.

Where does it work best?

Doors, roof, and interior trims.

Buy StP Biplast 15 Wave in Australia

Upgrade your interior with a professional acoustic foam solution trusted by installers across Sydney.

👉 Order now or explore full sound deadening systems