Alro logo Alro Steel was established in 1948 by Al and Robert Glick and has grown to include Alro Plastics, Alro Industrial Supply 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