Sonora High-performance multifunctional anti-vibration and thermo-acoustic material

STP Standartplast
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€ 89,00
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STP Sonora Multilayer soundproofing material for car doors with high effectiveness against noise and humidity

STP Sonora is a new generation multilayer soundproofing material designed for treating car door panels as a second layer of insulation. It is designed for environments subject to humidity and thermal variations, where a combination of acoustic insulation, absorption and protection is needed. Thanks to its layered structure, it integrates multiple functions in a single material, reducing installation time and improving the overall efficiency of the treatment.

How it works and what it is used for

STP Sonora is composed of multiple functional layers:

  • butyl layer for vibration damping
  • polypropylene foam sound-absorbing layer
  • high-density acoustic membrane
  • adhesive polymer layer

This structure allows you to:

  • reduce external noise entering the door
  • absorb internal sound waves
  • improve low frequency insulation
  • resist humidity typical of door panels

The result is:

  • significant reduction of road noise
  • quieter interior environment
  • improvement of overall acoustic comfort

When to use it and where to apply it

Main applications:

  • internal door panels as a second layer over vibration-damping material
  • internal surfaces subject to humidity

It is especially suitable for:

  • complete door treatment
  • improved cabin soundproofing
  • reduction of low frequency noise

It is not designed as a first vibration-damping layer, but as a functional layer of insulation and absorption.

How many sheets are needed and how to apply it

The number of sheets depends on the surface area of the doors and the desired level of treatment. Installation:

  1. apply a vibration-damping layer first
  2. clean the surface
  3. cut Sonora to size
  4. remove the protective film
  5. apply to the surface with uniform pressure

For correct installation:

  • avoid wrinkles or bubbles
  • ensure full adhesion
  • work on clean and dry surfaces

STP Sonora is a multilayer material specifically designed for door treatment, where humidity and noise coexist as critical factors. Thanks to the combination of damping, absorption and insulation in a single solution, it represents an effective system to significantly improve the acoustic comfort of the vehicle with a faster approach compared to traditional multilayer systems.

STP Sonora Technical specifications

  • Type: multilayer soundproofing material
  • Structure: butyl + polymer foam + acoustic membrane
  • Thickness: 5.2 mm
  • Coverage: up to 1.76 m² (depending on kit)
  • Operating temperature: -30°C / +80°C
  • Noise reduction: up to 31 dB (declared index)
  • Properties:
    • humidity resistant
    • combined multilayer
    • advanced acoustic insulation
    • low frequency noise reduction
€ 89,00 Price incl. VAT