Soundsteel MPM

constrained layer viscoelastic steel sandwich laminate

Soundsteel® MPM is a fully damped steel composite comprising two outer layers of steel, laminated together using a layer of a viscoelastic polymer, to form the laminate.

Using the “constrained layer” principle, the function of the viscoelastic interlayer is to damp disturbing structure borne sound.

Soundsteel MPM is free from resonance and coincidence phenomena which often detract from the performance of other acoustic insulation materials.

Soundsteel MPM can be used to fabricate acoustic doors, laundry and garbage chutes, ducts, enclosures, extraction hoods, and automotive components such as valve covers & oil sumps. Because of the steel base material, Soundsteel MPM can be used in Soundmetal MPM (Metal-Plastic-Metal) is a damped aluminium composite made with two layers, Aluminium & Viscoelastic polymer to withstand severe environments.

The standard product is supplied with an electro-galvanised finish, and available in various metals and surface finishes. Using electro-galvanised, cold-rolled, low carbon steel allows the laminate to be used as a structural material in equipment construction.

Soundsteel MPM is also available with a choice 304 and 316 stainless steel grades, with surface finish of either polished, brushed or polyethylene (PE) coating for additional scratch resistance. When exposed to harsh environments, SS316 offers considerably high heat and corrosion resistance when compared to other grades of stainless steels.

Note: Powder-coated panels should not be bent. Bending should be completed on plain panels and painted on site. We recommend conducting trials on small samples pieces first.

Soundsteel MPM

Soundsteel MPM

Technical data

Soundsteel® MPM is a fully damped steel composite comprising two outer layers of steel, laminated together using a layer of a viscoelastic polymer, to form the laminate.

Please refer to the Technical Data Sheet (TDS) for more information.

Document downloads

Document title Document type Document language
SOUNDSTEEL-MPM-TDS-121IP Technical Data Sheet English
SOUNDSTEEL-MPM-121IP-ZH Technical Data Sheet 中文 (Chinese)
Soundmetal-Install-101-1IG Installation Guide English
SOUNDMETAL-INSTALL-101-1IG-ZH Installation Guide 中文 (Chinese)
Marine Summary Brochure English
Transport Summary Brochure English
Pyrotek LNG & Offshore Catalogue Catalogues English
Pyrotek LNG & Offshore Catalogue - CZ Brochure 中文 (Chinese)


  • Engine rooms for high speed craft/vessels
  • Machinery and equipment, compressor and generator set enclosures
  • Acoustic hoods and chutes
  • Conveyor systems
  • Crushers / Granulators
  • Coin counters
  • Air conditioner casings
  • Automotive sumps and panels
  • Acoustic wall panels and doors


  • Maximum damping for minimum thickness
  • Complies to IMO FTP 2010 - low spread of flame
  • Can be used as part of the “main structure”
  • Cut, form and join just like plain aluminium
  • Insulates against air-borne sound, impact and vibration
  • Able to be painted & powder coated - best results from the manufacturer for powder coating
  • Effective “in-structure damping”
  • No need for external damping materials
  • Reduces or eliminates need for use of external isolators
  • Lightweight damped structures
  • Broad temperature range (-40ºC to 110ºC)
  • Able to fabricate using conventional machine shop tools
  • Available with a choice of polished, electro-galvanised, brushed or polyethylene (PE) coated surface finishes
  • Available with custom shapes and dimensions
  • Various configurations of metal thicknesses available from
    1 mm - 6 mm