Site updated: 21.5.18

Product was exactly as expected

Product was exactly as expected. Got here to Houston from GB faster than the other parts ordered from US vendors. I was... (8th March 2018 via Trustpilot)
AcoustiPack ML 3-layer 7mm OEM Material
(14 customer ratings / 1 review)

Acousti AcoustiPack ML 3-layer 7mm OEM Material

- Replaces the Acousti AcoustiPack EXTRA Single 3-layer Acoustic Sheet

This product is one sheet of AcoustiPack ML (multi-layer) 3-layer 7mm soundproofing material, dimensions 431 x 457mm (17" x 18"). AcoustiPack Ultimate contains one of these sheets plus two sheets of APML-2L4 (2-layer, 4mm).

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 (7mm), which is a single large sheet of their latest generation acoustic material (as found in AcoustiPack Ultimate). This sheet is ideal if additional materials are required for a particular project, and the space allows for a 7mm sheet to be added. This product makes the range of acoustic material kits more flexible, and can help to save money and waste when an entire kit, such as ULTIMATE or LITE is not necessary.


  1. Bulk sheets of 3-layer acoustic material, sold singly
  2. Designed for PC system builders or industrial applications
  3. Material sheet is triple-layer acoustic composite, 7mm thick
  4. Dimensions are 431 x 457mm (17" x 18")
  5. Highly acoustically effective and cost effective

ManufacturerAcousti Products
Product nameAcoustiPack Multi-layer 3L7
Product codeAPML-3L7
Material codeSA3.2F1B3.2F
ColourDark grey/black
CompositionTriple-layer acoustic composite
Installation methodSelf-adhesive backing
Dimensions457 x 431 mm (17 x 18 inches)
Total sheet area0.197m² (2.13 ft²)
Weight454g (16 oz)
Material weight per unit area2.28 kg/m² (0.47 lb/ft²) ±10%
Foam typeOpen cell
Normal operating temperature0°C-93°C (32°F-200°F)
Flammability certificationUL94-V0 (UKAS Accredited)
RoHS certifiedYes
PackagingBulk OEM
Warranty24 months

Customer Reviews

Good stuff, Reduced HDD noise.


Initially I thought this was just expensive foam. I was very wrong. The weight of the package told me that, it's heavy duty stuff. Covered the inside of my PC chassis with this. Overall noise reduced, most noticeably the noise from my HDD(s). The chassis used to echo their noise. Again excellent service from


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