High temperature insulation felt

The DALFRATHERM® range of high temperature insulation felts are soft vacuum-formed felts and boards, based on alkaline earth silicate (AES) wool or aluminium silicate wool. These lightweight, homogeneous insulation materials are characterised by a high temperature resistance, low thermal conductivity, and high resistance to thermal shock and chemicals.

The DALFRATHERM® range of felts is available different types with different dimensions, densities and classification temperatures up to 1430 °C. They are developed to reduce heat loss and overall energy consumption, and to meet the most stringent requirements for the final application.

Further Information


  • Gaskets for expansion joints, ladles and ingots;
  • Furnaces and technical installations;
  • High temperature sealings;
  • Fire-resistant covers;
  • Melting and holding crucibles


  • Excellent insulation performance;
  • Resistant to thermal shock;
  • High handling strength;
  • Smooth surface and low dust;
  • Excellent machinability

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.