Mica Gasket

Gaskets for high temperature applications
WS 3600 | WS 3662


The term Mica describes a group of minerals which have excellent fissility properties due to their silicate layer lattice. Mica has a lamellar non-fibrous structure and has been developed for manu facturing of gaskets for high temperature applications. Mica gaskets are used in the automotive sector, gas turbines, gas and oil burners, heat exchangers and in other flange connections. Mica gaskets are made from a material which consists of phlogopite mica paper and is waterproofed with a silicone binder. A special heat resis tant steel [1.4828] provides mechanical reinforcement in the form of corrugated metal ring inserts, eyelets and/or sheet reinforcement inserts. Both the media resistance of mica as well as the metallic reinforcement and eyelet elements have to be considered for application with aggressive substances. The consicerably low loss of mass during high temperature applications can be demonstrated with the thermogravimetric method. The loss of mass at 800 °C is less than 5 %.




  • Weight loss at 800 °C less than 5%
  • Chemical resistance against solvents, acids, bases and mineral oils [depending on the metals used]
  • Excellent temperature resistance, constant temperature up to 800 °C, short term temperature up to 900 °C
  • High pressure stability depending on the metallic reinforcement
  • Reinforced gaskets increase the blow-out resistance
  • Does not present a health risk, can be disposed with general waste
  • Mechanically stable thanks to metal reinforcements
  • Pressure operating limit is restricted, depending on surface pressure up to max. 5 bar
  • Non-flammable


  • Use in the area of hot gases specifically flue gas,exhaust fumes,thermal processes
  • Combustion plants and motors
  • Non-metallic gaskets for pipeline flanges, device and container flanges

Product Range

  • Non-metallic gaskets
    Dimensions following DIN EN 1514-1/4 and DIN EN 12560-1/4 or ASME B 16.21
  • Possible as layer for Kammprofile serrated gaskets and corru-gated metal gaskets and as filler for spiral wound gaskets
  • Non-standard dimensions/sizes
  • Mica corrugated metal gasket with or without inner eyelet
  • Mica non-metallic gasket with sheet reinforcement insert, with or without inner eyelet and/or outer eyelet

Sealmax has now tied up with KWO and IDT Germany for marketing their product range in India