General Details
Ruby Mica® Flexible Mica Sheet is made by combining muscovite or phlogopite mica paper with an inorganic silicone-resin binder under specific heat and pressure. It has excellent flexibility, heat-resistance, moisture-resistance and di-electric properties. It does not emit smoke or odor upon heating up.

Muscovite mica paper-based material can withstand temperatures up to 600° C whereas phlogopite mica paper-based material can withstand temperatures up to 800° C. The product is IEC 60371-3-3 compliant. Flexible mica sheets can also be made using a B-Stage epoxy resin as a binder. These sheets have excellent adherence to metal surfaces.


Filling voids and unevenness in conductor bunches, roebel bars, high-temperature-resistant gaskets, hollow spaces and cavities in electrical machines.


Standard Sheet:
Length : 1000 mm
Width : 600/1000/1200 mm
Thickness : 0.1 to 3 mm
(Sheets can be sheared to customized sizes)


Sheets are packed in airtight robust wooden boxes protecting them from dirt, dust and moisture. The packaging also ensures safe transit and storage.


6 months at ≤ 25°C • 12 months at ≤ 5°C

Techical Info
Material :
Mica % 80
Silicone % 80
Mechanical :
Density g/cm³ 2.1 ± 0.1
Tensile Strength MPa > 25
Compression % < 20
Electrical :
Dielectric strength KV/mm >20
Other :
Weight Loss % <0.5
Water Absorption % <0.2

Data is based on tests performed by Ruby Mica. Users are advised to verify and ensure suitability for intended applications. The above product can be tailored according to your desired specifications.

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