The excellent electrical insulation properties of glass fibers combined with their high strength makes them the preferred choice for many electrical and telecommunications applications. For example, electrical and transmission poles, fiber optic cables, insulator rods, laminates, cable trays and ladders are often manufactured with glass fiber composites. Critical electrical properties, such as dielectric strength, dissipation factor, breakdown voltage, and surface and volume resistivity, are met by glass fiber composites for electrical and telecommunication applications.

The Fiberex 408, 410 and 503, 510 series of single end roving, WR series of woven roving, and CR series of multi-end roving are used in products made by filament winding, pultrusion, and contact or compression molding for use in numerous applications in both the electrical and telecommunication sectors.