AcoustiPack ML 3-Layer 12mm OEM Material

Retail Price: $27.95
Price: $21.95
  • SKUAPML1000X2103L12
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Acousti AcoustiPack™ ML 3-Layer 12mm 1000x210mm

This product is one sheet of AcoustiPack ML (multi-layer) 3-layer 12mm thick soundproofing material, dimensions 1000mm x 210 mm  - 38.375" x 8.25".

The range of AcoustiPack™ sound-proofing kits has been designed with customer's pockets and greater flexibility in mind! As a result, Acousti have introduced AcoustiPack™ 3-layer Sheet 12mm), which is a single large sheet of their latest generation acoustic material. This sheet is based around the AcoustiPack ML 3-layer 7mm, but this sheet is 12mm thick. This extra thickness allows for even better noise reduction if space is available. It is supplied as a extra long sheet for those customer who require more material.


Manufacturer Acousti
Product name AcoustiPack Multi-layer 3L12
Material code APML-1000x210-3L12
Color Dark grey/black
Composition Triple-layer acoustic composite
Installation method Self-adhesive backing
Thickness 12mm
 Dimensions 1000mm x 210mm (38.375" x 8.25")
Foam type Open cell
Normal operating temperature 0°C-93°C (32°F-200°F)
Flammability Certificate: UL94-V0 (UKAS Accredited)
RoHS Certified Yes
Packaging Bulk OEM
Warranty 24 months


Material Features

These soundproofing materials have been designed to achieve maximum acoustic attenuation over a broad frequency range:

  • High Transmission Loss

    High transmission loss is the composite material's ability to impede airborne noise.

  • High Noise Reduction Coefficients

    High noise reduction coefficients is the composite material's ability to absorb airborne sound energy with minimal reflections.

  • Damping

    Damping is the composite material's ability to attenuate structure-borne vibration on metals and other substrates thereby reducing reradiated noise.

AcoustiPack ULTIMATE 3-Layer Materials

In our latest generation of 3-layer composite (Patent Pending), the dense acoustic barrier layer has been 'suspended' away from the substrate in the center of the acoustic foam. The construction layering is like this: (noise source) acoustic foam -> acoustic barrier -> acoustic foam (then the substrate, which is usually a metal sheet panel).

Image shows the 3 layer acoustic material design

AcoustiProducts 3-layer acoustic material design.

Sound energy first hits the upper foam surface, which is similar to the 2-layer construction, in that it is a low-reflective soundproofing material that is particularly effective at absorbing high frequencies. The sound energy then encounters the central suspended barrier layer, which is decoupled from the substrate. This high-density high-mass layer acts as an acoustic barrier mass to the transmission of energy through the material. The 3rd layer of foam acts to suspend the barrier layer a small distance away from the substrate. We have found from both small scale impedance tube and larger scale reverberation chamber acoustic tests that the 'suspended' central acoustic barrier effectively increases the absorption of low frequency noise (<1kHz). This may well be a result of the 'mass-spring effect', where low frequency energy is absorbed by the sound 'moving' the layer when it is excited by certain resonant frequencies.

Image shows the suspended barrier layer in the center of the 3-layer 7mm acoustic composite use in this product.

The 3-layer materials are attached by a supported self-adhesive directly to the substrate, and have a damping effect on panel vibrations. (Hit the side of your PC once fitted, and you will hear a dull 'thud' sound).



Large PC case, powerful PC case, gaming PC case or pedestal server case.

Designed for industrial uses.

Perhaps best suited where there is enough room to fit a sheet of acoustic materials that is 12mm thick. Best fitted directly opposite a noise source, such as adjacent to the CPU fan on the inside of the case side door panel, or on the floor directly below a noisy HDD cage.

For more technical and installation information please visit the Acousti Products US website.

Acoustic Materials manufactured in the USA.


Please take care to read the installation recommendations before installing this product. These materials are installed at the installer's own risk.

If you are a reseller or a system builder we offer special pricing on bulk orders of this product. Contact us at or call Toll Free (877) 205-2020 for more information.