Glass-epoxy G7

G7 glass fiber sheets are high-temperature laminates based on silicate glass and silicone resin. Due to their exceptional thermal resistance and dielectric properties, G7 sheets are often used in the electrical industry where material stability at high temperatures is required. The sheets have low moisture absorption, are self-extinguishing, and offer excellent insulation properties even in humid or chemically demanding environments.

Main Properties:

• Excellent thermal resistance 180 °C (up to approximately 220–250 °C for short-term exposure)

• Good dielectric properties at high temperature

• Low moisture absorption

• Self-extinguishing properties

• Excellent dimensional stability

• Resistance to chemicals and humidity

Typical Applications:

• Insulating components in transformers and motors

• Electrical insulators in high-temperature devices

• Components for high-voltage equipment

• Insulation barriers in electric furnaces or heating devices

Standards:

• NEMA G7

• IEC 60893 (in certain cases referred to as SI GC 202)

• UL 94 (self-extinguishing – class V0)

Names according to various standards:

• NEMA: G7

• DIN/EN/IEC: SI GC 202