PROMATECT® 250 comprises autoclaved calcium silicate spheres (PROMAXON® is a synthetic hydrated calcium silicate in spherical form) bound in a mineral matrix. PromaX® technology provides excellent fire performance in most applications.

PROMATECT® 250 is off-white in colour. One face is smooth and ready to form a finished surface, able to receive almost any form of architectural/finish treatment. The reverse face is sanded.

PROMATECT® 250 is not designed for use in areas subject to continual damp or high temperatures, and designed for internal applications only.

Further Information


  • Fire protection of steel structures and mezzanine floors.


  • Steel Protection up to FRL 120/-/-
  • Fire Reaction Class: A1 Non Combustible EN13501-1
  • High level of finish
  • Most types of architectural finishes can be applied.
  • Non combustible to AS1530.1
Reaction to fire: A1, non-combustible
Use Category: Z2
Approx. Alkalinity (pH): 9 pH
Approx. Dry Density (kg/m³): 750 kg/m³
Moisture Content Min (%): 2 %
Approx. Thermal Conductivity @ 20 °C (W/m°K): 0.189 W/m K
Bending Strength Longitudinal (N/mm²): 3 N/mm²
Tensile Strength Longitudinal (N/mm²): 1.2 N/mm²
Compressive Strength (N/mm² perpendicularly to the board surface): 6.6 N/mm²
Storage Conditions: Storage Temperature 2ºC : 45ºC. Must protect from freezing and excessive heat. Store in a dry environment.
Storage Temperature Min (°C): 0 °C
Storage Temperature Max (°C): 45 °C

Please note
All physical and mechanical values are averages based on standard production and tested according to internal procedures. The typical values are given for guidance. The figures can change dependent on the test methods used. If a particular value is of prime importance for a specification, please consult Promat Technical Department.



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