Grade G10 is a continuous woven glass fabric laminated with an epoxy resin. This grade is extremely high in mechanical strength, has low water absorption and dissipation factors and has superior electrical characteristics. These are exhibited over a wide range of temperatures and humidities.

Grade G-10 is used for terminal boards, washers, sleeves, structural components, and parts where the strength to size ratio is critical. G10/FR4 has extremely high mechanical strength, good dielectric loss properties, and good electric strength properties, both wet and dry. G10/FR4 is fire retardant.