Megasorber FG is a tough and durable acoustic foam panel. It utilises a patented non-combustible sound-absorbing facing material, Soundmesh® G8 (U.S. Patent No. 8167085, Canada Patent No. 2674986, Australia Patent No. 2009206197) and has superior sound absorption capacity.




dark grey






FG Sound Absorption

Hear how Megasorber FG50 effectively reduced the reverberation noise in a large hall

The unique facing material Soundmesh® G8 is non-combustible. It has BS 476 Part 4 “Non-combustible Classification” and Building Code Australia (BCA) Group 1 Fire Classification. It complies with IMO Resolution A653(16) requirements. It has high-temperature resistance up to 550°C

Soundmesh® G8 facing is a smart material that breaks the soundwave down into smaller components and then traps and dissipates the soundwave within the foam behind it. The acoustic impedance of G8 is tuned to maximise sound absorption.

Megasorber FG successfully passed the rigorous acoustic testing by Cummins Power Generation for global supply and use by Cummins sites worldwide.

Megasorber FG uses hydrolysis-resistant acoustic foam and has high durability (long service life) in hot and humid conditions such as marine and tropical environments. The foam is capable of operating continuously from -40°C to +120°C. Megasorber FG meets the requirements of GM Holden Australia Specifications HN 2483 – Acoustic Insulator.

The Unique Sound Absorption Mechanism of Megasorber FG

A water-repellent Soundmesh® G8 is also available.  The built-in fluid/water repellent property of Soundmesh® G8 provides easy cleaning and maintenance of the facing and makes it suitable for outdoor applications.

Soundmesh® G8 has four standard colours white (W), black (B), grey (G) and sandstone (S). It can also be colour-matched to any specific colour; however, a minimum order quantity will apply.

Examples of engineering applications

  • Genset room
  • Genset enclosures
  • HPU enclosures
  • Pump encloures

Features and benefits

Read more

Key Features

  • Non-combustible sound absorbing facing – will not ignite
  • Superior sound absorption utilising patented technology
  • Lightweight and self-supporting
  • Tough and durable facing
  • Resistant to dust and fluid splash
  • Hydrolysis resistant
  • Ease of application
  • Ease of cleaning:  dirt marks of finger marks can be easily removed with water and Megasorber Clean M8 black


  • Reduces potential fire hazards with non-combustible acoustic facing
  • Reduces airborne noise very effectively
  • The product will not rot or powderize in hot and humid conditions
  • Long service life
  • Clean to handle and easy to cut
  • Resists liquids, dust and fluid splashes or sprays
  • Low installation costs

Acoustic Properties

Read more

Typical results when tested in a reverberation room:

Random Incidence Absorption Coefficient tested to AS ISO 354-2006: ‘Acoustics: Measurement of sound absorption in a reverberation room

Technical specifications

Read more

Product Codes

Standard thickness 25mm, 50mm, 100mm

Product Code Thickness Panel Size
Megasorber FM25 25mm 1.2m x 2.4m
Megasorber FM50 50mm 1.2m x 2.4m
Megasorber FM100 100mm 1.15m x 2.35m

Other thicknesses available: (minimum order quantity applies) 12mm, 38mm & 75mm


  1. Base foam is either white or light-grey;
  2. Standard facing colours are: white, grey and black; Aquatic, Dark Grey and Sandstone are made to We offer custom cutting to size; please note that cutting charges will apply. Prices will be quoted on the application.
  3. Product code with optional extra:
  4. G8 facing may have a stripy appearance and creases. Hairline creases may appear on the facing when The creases do not affect the acoustic performance.
  5. There are colour variations between batches; whilst we take every care to minimise batch-to-batch variation, in some instances, variation may be unavoidable and will occur.
  6. Dimensional change will occur in the FM foam substrate with a change in relative humidity and temperature, this may cause creasing on the Soundmesh® G8 facing. The creases do not affect acoustic performance.
  7. Thickness tolerance is ± 5%, and sheet dimension tolerance is ± 1%.
  8. The standard sheet size is 2m x 2.4m. Other sheet sizes available: 1200mm x 1200mm and 1200mm x 600mm (1195mm x 595mm if packed in boxes). We can cut panels to size; however, extra cutting charges apply.
  9. Water repellent facing is recommended for easy surface
  10. Recommended adhesive is Megasorber A200 or Megasorber


Thickness (mm)







Base Foam

W = White

G = Grey

Soundmesh® G8

RW = Water repellent white

B = Black

RB = Water repellent black

G = Grey

RG = Water repellent grey

DG = Dark Grey

RDG = Water repellent dark grey

RS = Water repellent sandstone

RQ = Water repellent aquatic

Optional extra

DS = G8 on both sides

Blank = G8 on one side only

Physical Properties

  1. Base foam colour: White or light grey;
  2. Density, weight and thermal insulation (R-value) properties
Product Code FM12 FM25 FM38 FM50 FM75 FM100
Nominal density (kg/m³) 25 16 13 12 11 10
Nominal weight (kg/m2) 0.30 0.40 0.50 0.60 0.80 1.0
R-value* 0.35 0.74 1.12 1.47 2.21 2.94

* Calculated value based on thermal conductivity @ 15


  1. AS 1 – 2015 Determination of fire hazard properties:

Product Group Number Classification                                                                                    Average Specific Extinction Area

Group 1                                                                                    98.3 m²/kg

  • 1-2015: Reaction to Fire Tests – Heat Release Smoke Production and Mass Loss Rates. Group 1 Classification.
  • 3.1989: Early Fire Hazard Properties: Simultaneous Determination of Ignitability, Flame Propagation, Heat Release:
Ignitability Spread of Flame Heat Evolved Smoke Developed
0 0 0 4
  • BS 476-6:1989+A1:2009 Fire tests on building materials and structures – Fire propagation of products:
Fire propagation index, I Sub-index, i1 Sub-index, i2 Sub-index, i3
7.4 5.3 2.1 0.1

AS ISO 354-2006 Measurement Results

Hz FM12 FM25 FM38 FM50 FM75 FM100
100 0.00 0.07 0.11 0.15 0.27 0.40
125 0.00 0.1 0.16 0.22 0.32 0.60
160 0.05 0.14 0.23 0.33 0.61 0.89
200 0.05 0.17 0.40 0.63 0.77 0.96
250 0.10 0.31 0.52 0.84 0.95 1.05
315 0.15 0.48 0.75 1.14 1.12 1.07
400 0.20 0.72 0.95 1.25 1.16 1.02
500 0.30 0.88 1.05 1.15 1.08 1.00
630 0.40 1.04 1.07 1.17 1.01 1.01
800 0.50 1.04 1.10 1.13 1.01 1.01
1000 0.65 1.03 1.09 1.08 0.96 0.96
1250 0.75 1.09 1.10 1.08 0.94 0.94
1600 0.90 1.05 1.04 1.02 0.96 0.96
2000 1.00 1.04 0.98 0.94 1.00 0.92
2500 1.05 0.99 0.91 0.9 0.96 0.96
3150 1.05 0.98 0.90 0.87 0.94 0.94
4000 1.00 0.9 0.89 0.9 0.95 0.95
5000 0.85 0.82 0.89 0.87 0.92 0.92
NRC 0.5 0.8 0.90 1.00 1.00 1.00
a 0.40(H) 0.60(MH) 0.90 1.00 1.00 1.00

Frequency                                             Random Incidence Absorption Coefficient

  • BS 476-7:1997 Fire tests on building materials and structures – Surface spread of flame of products Classification: Class
  • EN45545-2:2013+A1:2015 Railway Applications – Fire protection on railway vehicles Part 2: Requirements for fire behaviour of materials and components. Meets the requirements of R1 for HL1, HL2, HL3 Hazard Level Classification.

Volatile Organic Compounds (VOC)

ASTM D5116 “Standard Guide for Small-Scale Environmental Chamber Determinations of Organic Emissions from Indoor Material/ Products”: 0.016 mg/m2/hr (well below the GreenTag requirement limit of 0.5mg/m2/hr).

Download the technical specifications

Installation instructions

These recommendations are for general guidance only. Installation methods must be tested under actual service conditions to determine their suitability for a particular purpose.

Read more

Keep acoustic panels flat. Panels must be kept flat during the handling and installation process. Bending or folding sheets may create creases on the Soundmesh® G8 facing. Once formed, these creases are difficult to remove.

Cutting (if required). The panel can be hand-cut by a knife (sharp utility knife or similar) or machine-cut by a bench saw or rotating blade cutter with a toothless blade.

Note: It is recommended to wear gloves during cutting. The Soundmesh® G8 facing edges may irritate or cut the skin.

Clean substrate surface with Megasorber AC5, acetone or similar. The surface must be dry, free of oil, dust, grease, rust and other contaminants.

Install the panels direct-fix using Megasorber A200 or A100 adhesives, with express finish edges or between panels using powder-coated aluminum trim.

Clean dirt and marks on the Soundmesh® G8 facing with Megasorber

M8 Clean block and water. Dry with a microfiber cloth. Remove excessive adhesive on hands, cloth or equipment with Megasorber AC5.

Direct-fix acoustic panels using Megasorber A200 adhesive.

Available in 600ml sausage for caulking gun and 290ml cartridges for cartridge gun.

  1. Apply adhesive on the back of the acoustic panel (NOT on the Soundmesh® G8 facing).
  2. Install the panel immediately after application of the

Application Pattern

Full-size panel (1.2m x 2.4m) adhesive application 

Minimum bead size (glue width) = 10mm to 15mm diameter. Recommended usage: approx. 1.5 to 2 sausages per full-size panel (1.2m x 2.4m), or approx. 2-3 cartridges per full-size panel.

Direct-fix with Megasorber A100

Spray Adhesive

  1. Connect a hose and spray gun to the new canister. Roll the canister backwards and forwards vigorously for 1-2 minutes to ensure the adhesive has not settled or separated during transit.
  2. Spray adhesive onto the back of the acoustic panel (not on the Soundmesh® G8 facing). Spray one coat to seal the porous surface vertically and then a second coat horizontally to achieve maximum adhesive contact.
  3. Spray adhesive on the substrate.
  4. Allow adhesive to dry thoroughly. The adhesive should be touch-dry in 3-5 minutes (depending on conditions).
  5. Bond both surfaces together within 10 minutes of the adhesive being touch-dry.
  6. Apply uniform pressure over the surface after.

Spray patterns


Note: we recommend A100 on a smooth surface, such as refrigeration panels, plasterboards and metal panels. A100 is not suitable for uneven or textured surfaces. For uneven or textured surfaces, such as concrete soffit and brickwork, we recommend A200 adhesive.


Express Finish.

Leave a gap of 20mm to 30mm between panels

Powder-coated aluminium or metal trims

FM50 Acoustic Panel

Download the installation guide

Information for Specifiers

Please feel free to use the information to include in your project specifications.

Read more

Soundproofing case studies