Alro logo Alro Steel was established in 1948 by Al and Robert Glick. Today, Alro is comprised of Alro Steel, Alro Metals, Alro Plastics and Alro Metals Outlet.

Alro Plastics Product: PHENOLIC G-11 (High Temp Glass Epoxy)

Size and Availability:

Sheet / Slab stock
- Thickness: 1/16”thk to 4”thk standard
- Sheet sizes: 48”x 120”, 48”x 96”, 48”x 48”, 36”x 48”

Rod / Solid Rounds
- Diameters: 1/16” to 2-1/2”Dia.
- Lengths: 2 ft to 4 ft standard lengths

Tubing / Hollow Rounds
- Diameters: 3/16”OD x 1/8”ID up to 2.50”OD x 1.50”ID
- Lengths: 2 ft to 4 ft standard lengths

Phenolic G-11 (NEMA G-11) is a high performance thermoset epoxy fiberglass composite that provides higher strength than similar products. Phenolic G-11 offers excellent physical, mechanical, and electrical properties at both room temperature and elevated temperatures. Phenolic G-11 is chosen over high-temperature mat glass thermoset composites and high performance glass-filled thermoplastics because of its excellent machining characteristics, outstanding dimensional stability, superior creep resistance, and excellent high-temperature and performance characteristics.

The product is considered the premier material for use as Class F insulation in electrical power generation and transmission equipment. Phenolic G-11 complies with the requirements of MIL-1-24768/3, Type GEB.


  • Extremely high mechanical strength
  • Low water absorption
  • Superior electrical characteristics


  • Terminal boards
  • Washers
  • Sleeves
  • Structural components