Product Benefits

  • Acoustic absorption: αw = 1
  • Reaction to fire: A1
  • Cleaning: five cleaning methods
  • Light reflection: > 89%
  • 100% flat irrespective of the moisture content
  • Painted edges and faces, Boreal finish
  • High density panel
  • Smooth, satin and bright finish
  • Control of airbone particles: ISO 4
  • Resistance to mold: Degree 0

Caracteristics & Performance

Acoustic absorption

Tonga® Ultra Clean A 40
  • αw = 1 : class A / NRC = 1


  • Light reflection: The light reflection coefficient is more than 89%.
  • White: L = 95.6% - according to ISO 11664-4.
  • Gloss: Matt - The gloss value is 2,54 % avec un angle de 85° et 2,54 % with 85° angle - according to ISO 2813.
  • Light diffusion: > 99 % of the light is diffused.

Fire reaction

  • According to EN 13501-1: Euroclass A1.

Fire resistance

  • 111 Tonga® Ultra Clean A 40 ceilings (600 x 600 mm) installed on a T24 Quick-Lock® grid (see test report) satisfy the requirements of Section CO13 in the French fire regulations for public-access buildings.
Classification Modules (in mm) Load-bearing structures Additional insulation
REI 30 600 x 600 Concrete, Steel No
REI 30 600 x 600 Timber, Concrete, Steel 160 mm Eurolène® 603 + 0 to 200 mm of IBR
  • 111 Tonga® Ultra Clean A 40 ceilings (600 x 600 and 1,200 x 600 mm) installed on a T24 Quick-Lock® grid (see test reports) are SF 30 according to Belgian standard NBN 713-020.

Humidity performance

  • 100% flat irrespective of the moisture content.

Thermal resistance

  • According to the EN 13162, Tonga® Ultra Clean A 40 ceilings offer thermal resistance of 1,10 m². K / W.

Control of Airborn particles

  • Tonga® Ultra Clean A 40 ceilings are Class ISO 4 according to ISO 14644-1.

Resistance to mould

  • Tonga® Ultra Clean A 40 ceilings prevent fungal growth: Degree 0 according to ISO 846.


Environment and health


  • Mineral wool is recyclable, and the vast majority of production waste is recycled. The recycled content of our Tonga® Ultra Clean A 40 panels is 45%.
  • For projects based on LEED®, BREEAM® and HQE™ Green Building certifications, EPD (Environmental Product Declarations) are available. Contact us.
  • Eurocoustic is certified to ISO 14001: 2015 "Environmental Management Systems".


  • Eurocoustic stone wool is certified by EUCEB (EUropean CErtification Board of mineral wool product).
  • Stone wool panels are manufactured with fibers exempt from the carcinogenic classification (European Regulation 1272/2008 as amended by European Regulation 790/2009). According to the International Agency for Research on Cancer, mineral wool is not classifiable as to its carcinogenicity to humans (Group 3).

CE Marking

  • DoP no.: 0007-04.

Indoor Air Quality

  • Tonga® Ultra Clean A 40 products are classed A.

Installation & Cleaning


  • Installation must conform to the requirements of the DTU 58.1 code of practice, the NF P 68203-1 and 2 standards and other applicable standards and codes of practice according to the type of room.
  • You are advised to ensure that air can circulate between the rooms and the plenum to balance the temperature and pressures on each side of the ceiling.
  • Tonga® Ultra Clean A 40 ceilings are fitted on T15 - T24 grids.
  • Tiles can be cut with a craft knife without generating any noise or dust.
  • The direction in which the panels should be installed is indicated on the back of the panels.
  • Contact us if any mineral wool is to be laid in the plenum.


  • The painted surface of Tonga® Ultra Clean A 40 ceilings does not retain dust, which makes them easier to clean.
  • Tonga® Ultra Clean A 40 ceilings can be cleaned using light brush, vacuum cleaner, compressed air, wet sponge (with or without detergent), dry or wet steam + dry cloth.
  • This type of cleaning will help extend the service life of Tonga® Ultra Clean A 40 ceilings.

Colors & Dimensions


Our commitments

Fast and flexible logistics, technical assistance, customer service: Saint-Gobain Eurocoustic accompanies you on your projects on a daily and long-term basis.

Read more


Reinvent your ceilings with our new colors

A selection of 40 colors

6 new graphical options

Custom Colors service

Print your own visuals

Visual consistency between tiles and grids