PROMASIL® lightweight calcium silicate insulation boards have excellent thermal and mechanical properties. These rigid boards are ideally suited for high temperature applications, especially in all types of furnaces. In combination with dense and lightweight refractory bricks or concrete, the boards constitute a thin and efficient back-up insulation lining.

The PROMASIL® range consists of various medium and large-size insulation boards with different densities and temperature grades, designed for specific applications.

Apart from rigid insulation boards, PROMASIL® materials are also available as pipe sections, segments and cut sections, that are clean and easy to handle and install.

Further Information


  • Heat treatment furnaces;
  • Smelting furnaces;
  • Anode baking furnaces;
  • Regenerators;
  • Ceramic furnaces


  • Low thermal conductivity;
  • Rigid and lightweight;
  • Excellent mechanical strength;
  • Clean and easy to handle and install

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.