STP BIPLAST/BiSound 15 Self-adhesive acoustic and thermal insulation 15 mm (7 Sheets)

STP Standartplast
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€ 79,90
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STP BIPLAST / BiSound 15package of 7 sheets of thermal insulation and soundproofing material

STP Biplast 15 is a self-adhesive sound-absorbing and thermal insulating material designed to improve cabin acoustic comfort by reducing interior noise, secondary vibrations and squeaks from plastic surfaces. Made of elastic open-cell expanded polyurethane, it is used as a second layer over anti-vibration materials to complete the soundproofing treatment of doors, roof, interior plastics and cabin panels. The 15 mm thickness allows for higher acoustic absorption compared to thinner materials, making it particularly suitable in areas with greater sound propagation.


Why use a sound-absorbing material

Anti-vibration materials help reduce sheet metal resonances, but part of the noise continues to propagate inside the cabin through air, panels and coverings. STP Biplast 15 helps to:

  • absorb part of the internal sound waves
  • reduce squeaks and vibrations from plastics
  • improve driving comfort
  • limit internal reverberation and noise
  • increase thermal insulation of the cabin

The elastic open-cell structure also improves the material's ability to adapt to irregular surfaces and interior panels of the vehicle.

Recommended applications

STP Biplast 15 is mainly used as a sound-absorbing and anti-squeak layer in automotive applications. Typical applications:

  • door panels
  • vehicle roof
  • interior plastics
  • dashboard
  • center tunnel
  • side panels
  • trunk

It is particularly suitable for:

  • OEM comfort improvement
  • car audio upgrade
  • cabin noise reduction
  • elimination of secondary plastic vibrations

Thanks to its soft and elastic structure it can be easily installed even on slightly contoured surfaces.

Installation and use

Recommended procedure:

  1. first apply the anti-vibration material to the sheet metal
  2. carefully clean the surface
  3. cut Biplast 15 to the desired size
  4. remove the protective film
  5. apply with uniform pressure

The material is self-adhesive and can be easily shaped during installation.


STP Biplast 15 is a practical and effective solution to improve cabin acoustic comfort through a light treatment that is versatile and simple to install. Thanks to its high thickness and elastic sound-absorbing structure, it represents an ideal complement to anti-vibration materials in automotive applications aimed at reducing interior noise and improving everyday comfort.

Scheda tecnica

n-20250822142801-stp-biplast-1.pdf

7x STP BIPLAST 15 sheets

STP BIPLAST / BiSound 15 Technical specifications

  • Type: sound-absorbing and thermal insulating material
  • Material: elastic expanded polyurethane
  • Structure: open-cell
  • Thickness: 15 mm
  • Sheet dimensions: 375 x 500 mm
  • Application: self-adhesive
  • Operating temperature: from -40°C to +100°C
  • Maximum thermal resistance: up to 150°C
  • Sound absorption: up to 85%
  • Properties: sound-absorbing, thermal insulating, anti-squeak
  • Use: automotive / car audio / cabin comfort
€ 79,90 Price incl. VAT