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Calcined muscovite mica tape backed with fibre glass fabric

phlogopite mica tapeMica tapes for fire-resistant cables are reinforced with high temperature resistant silicone resin. The resin is there to ensure mica cohesion and mica adhesion to its support. All together the various components offer effective fire resistance with zero halogen emission.

In the particular case of muscovite, the ore is heat treated at a temperature of around 450°C in order to take out the water of crystallization and by doing so, stabilize its mechanical properties.

Once treated, muscovite mica paper is a better electrical insulator than phlogopite mica paper. So muscovite mica paper will be chosen in the case of applications where dielectric strength is favoured to high temperature.

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Mica paper thickness is an important variable that has to be decided upon in relation with the performance aimed at. The overlapping rate of the mica tape as well as the number of layers around the conductor will also determine the fire-resistant capability of the cables.

The labelling of our products is quite transparent:

  • CM : stands for the type of Calcined Muscovite mica used,
  • 0.11 : refers to the thickness of the product,
  • FG : refers to the support backing the mica paper, here FG stands for Fibre Glass.
  • 32 : refers to the weight of the support per m2, here 32 g/m2

For instance, M-0.11 FG32 is a 0.11 mm thick tape made up of muscovite mica with a 32 g/m2 glass fibre backing
The following products are in stock at MTE: CM-0.11 FG32, CM-0.12 FG32, CM-0.14 FG32.

The standard range of MTE tapes are used for the manufacturing of fire-resistant cables according to the most common national and international norms, such as IEC 331, BS6387CWZ or DIN 4102 part12. These norms establish the cable performances univocally. They offer a way of judging of the quality of mica protection and cable construction.

Please contact us if your applications require configurations that are not in our standards.

For more information download the files below :


For sanitary reasons, the WIRE exhibition that should have taken place in March in Düsseldorf will finally be held from 7 to 11 December 2020. We will be pleased to welcome you at our new booth 13E05 (iso 13D15).


During the event, MICA TAPES Europe will present a world premiere: a brand new MICA-FREE  fire-resistant tape. Named M-TapE, this new solvent free fire-resistant tape is in line with our environmental philosophy, making MTE the forerunner in the production of fire-resistant tapes. In this article, we explain the assets of this technology that will give future customers important competitive advantages.