Fiber Glass Composites

General Details
Ruby Mica® Epoxy /Silicone Bonded Fiber Glass Composites are made by combining glass cloth with an epoxy/silicone resin as a binder, cured under specific heat and pressure.

It has excellent rigidity, heat-resistance, moisture-resistance and di-electric properties. It is a completely asbestos-free and highly chemical-resistant insulation having low thermal-conductivity. It does not emit smoke or odor upon heating up. Epoxy-based composites can withstand temperatures up to 250 – 300° C, whereas silicone-bonded composites can withstand temperatures up to 350 – 450° C.


Highly temperature-resistant composite machined-parts for Ferro alloys submerged arc furnace and induction furnace insulation.

Slot packing insulation in HT motors, high-temperature washers in lifting magnets, etc.


Standard Sheet
Length : 1000 mm
Width : 600/1000/1200 mm
Thickness : 0.1 to 50 mm
(Sheets can be sheared to customized sizes)

Standard Tubes
Length : 10-1000mm
ID : 6 – 200 mm
(Tubes can be rolled to customized sizes)
Machined Composite Parts

Techical Info
Fiber glass cloth % 70±5
Epoxy resin % 30±5
Fiber glass cloth % 80±5
Silicone resin % 20±5
Density g/cm³ > 275
Tensile strength MPa > 275
Flexural strength MPa > 230
Compressive strength MPa > 400
Dielectric strength kV/mm > 30
Operating Temperature °C 250 – 300 (Epoxy)
350 – 450 (Silicone)
Weight Loss % < 0.5
Water Absorption % < 0.1

Data is based on test performed by Ruby Mica Co. 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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