STP BIPLAST 25 pack of 4 sheets, sound-absorbing thermo-acoustic 25 mm, sheet 375 x 500 mm

STP Standartplast

Coming soon

Your price:
€ 89,90
Price per single item (VAT included)

STP Biplast 25 Thermoacoustic sound-absorbing material thickness 25 mm sheet 375 x 500 mm. Pack of 4 sheets


STP Biplast 25 is a thermoacoustic sound-absorbing material designed to reduce reflected noise and improve acoustic comfort inside the cabin. Unlike classic closed-cell insulators, Biplast uses a high-density open-cell polyurethane foam structure, designed to absorb sound waves instead of reflecting them. The high thickness of 25 mm makes it particularly effective in applications where it is necessary to address residual noise and internal acoustic reflections.


How a sound-absorbing material works

After reducing vibrations (anti-vibration materials) and thermally and acoustically insulating (closed cells) there remains reflected noise inside the cabin. STP Biplast 25 acts precisely at this level:

  • absorbs sound waves
  • reduces reverberation and reflections
  • improves the perceived sound quality
  • contributes to a more controlled acoustic environment

The open-cell structure allows to "trap" sound energy by converting it into heat, thus reducing the perceived noise level.

Recommended applications

Thanks to the high thickness, it is suitable for areas with sufficient space. Typical applications:

  • internal door panels (on the trim side)
  • vehicle roof
  • side panels
  • trunk
  • internal partitions
  • areas behind plastics and trim

It is particularly suitable for:

  • acoustic comfort improvement
  • internal noise reduction
  • car audio systems
  • elimination of sound reflections

It is not suitable as a first layer on sheet metal (it is not anti-vibration).

Installation and use

Recommended procedure:

  1. apply anti-vibration material first (if necessary)
  2. ensure the surface is clean
  3. cut the material into the desired shape
  4. remove the adhesive film
  5. apply with uniform pressure

Thanks to its elasticity:

  • it adapts easily to surfaces
  • compensates for gaps and tolerances between panels
  • helps eliminate secondary vibrations and squeaks


STP Biplast 25 is a sound-absorbing material designed to improve acoustic comfort by addressing residual noise and internal reflections.


Thanks to the open-cell structure and high thickness, it represents an effective solution to complete multilayer treatments and achieve a more controlled acoustic environment, especially in car audio installations and comfort-oriented projects.

Scheda tecnica

n-20230705105307-stp-biplast.pdf

4x sheets STP BIPLAST 25

STP Biplast 25 Technical specifications

  • Type: thermoacoustic sound-absorbing material
  • Structure: open-cell polyurethane foam
  • Sheet dimensions: 375 x 500 mm
  • Thickness: 25 mm
  • Density: high (high-capacity technical material)
  • Application: self-adhesive
  • Properties: sound-absorbing, thermoinsulating, secondary vibration prevention
  • Performance: high acoustic absorption
  • Use: automotive / car audio / cabin comfort
Coming soon