FRM Boards

Key Features

  • Excellent fire protection performance.
  • High thermal insulation.
  • Easy and quick assembly.
  • Free of hazardous substances.
  • Wide range of applications.
  • Antifungal, rodents and insects protection.
  • Excellent Stability under humid or wet conditions.
  • Frost/thaw resistant.


PassiveTec® fireboards are made from fibre reinforced magnesium and other refractory products. A1 classified as per EN standard, designed to achieve fire protection up to EI 240. PassiveTec® fireboards have been developed for a wide range of applications in today’s demanding construction industry.


PassiveTec® FRM board test certification has been conducted in different accredited laboratories in Europe under the EN fire protection standards. PassiveTec® Tunnel Tunnel Liner boards offer a wide range of solutions for tunnel applications, tested to RWS 1350 for 180 mins and 120 mins, HCM for 180 mins and ISO 834 for 240 mins.


The board finish in a light grey / white colour. PassiveTec® boards can be left as a standalone finish or can be painted if required. Edges of boards can be squared or tapered.

Health and Safety

PassiveTec® boards do not contain hazardous substances according to the database of the 041/051 DS European Commission. They do not produce toxic smoke or fumes under fire exposure.

Applications under EN 13501 & BS EN 12467

Applications such as wall linings, external walkways, soffit board, roof upstands and many more.

More specialist applications with more detailed testing such as tunnel linings , ventilation ducts, smoke extractions ducts, kitchen extraction ducts are available (see Ducts, Tunnels in this site).

Available Sizes

1200 x 2400 mm, 1200 x 2300 mm, Other sizes upon request


6mm, 9mm, 10mm, 12mm, 15mm, 20mm

Tunnel Boards

20mm, 24mm, 30mm, 40mm

PassiveTec® Physical Properties
Fire performance non combustible A1 class
Density 950 kg/m3 ± 10 %
Thermal conductivity (W/m.K) 0,29
Thermal resistance (m2.K/W) 0,1
Lineal thermal expansion a (°K-1) - 3,1 x 10-5 (long) and - 4,1 x 10-5 (tran)
Electrical surface resistance [kΩ] 5,1
Bending strength. Modulus of rupture MORa (N/mm2) 4,7
Tensile strength parallel to faces: σ (kPa) 931
Tensile strength perpendicular to faces: σ (kPa)  1550
Determination of compression behavior. Breaking load (N) 25213
Lengthwise tolerance ± 2 mm
Widthwise tolerance ± 2 mm
Thickness tolerance -1 ± 2 mm
Edge straightness ≤ 0,1%
Water absortion 0.20g / cm3
Water vapour diffusion resistance µ:3,5

Values will vary according to different thicknesses. Some values quoted relate to internal testing across the size range. Individual test certificates are available upon request. We reserve the right to improve product performance at any time and without prior notice. Stricter board tolerances can be achieved to suit specific project requirements.