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: Durashield® Fiberglass Foam Core Building Panels

Size and Availability:

- Size 1: 1” thick x 12” wide
- Size 2: 3” thick x 24” wide
- Lengths: typically 12 ft to 32 ft
- Lengths: customizable, can run any practical length needed.

Durashield® is a tongue-and-groove fiberglass pultruded panel comprised of a pultruded skin over a foam core. Durashield panels are designed to be used as walls, roofs, and covers.

The pultruded fiberglass skin is available in either an isophthalic polyester or vinyl ester resin. Both resin systems provide flame retardance (UL94 VO). The vinyl ester is utilized in extreme corrosive applications. A synthetic surfacing veil is incorporated into the skin to improve weathering, corrosion resistance and resistance to degradation from ultraviolet rays. Resistance to weathering can be further enhanced by the application of a polyurethane paint.

The core material is a rigid closed-cell urethane foam. The ends of the panels must be encapsulated or coated with a resin similar to the skin resin to maintain the corrosion and weather resistant qualities of the total panel.


  • Integral Insulation
  • Corrosion Resistance
  • Strength
  • Transparent to Electromagnetic Emissions
  • Lightweight
  • Non-Conductive
  • Flame Retardance


  • Radar, Microwave, Radio and TV Antenna Enclosures
  • Enclosures for Electrical Equipment
  • Enclosures of Chemical Processing Operations
  • Buildings for EMI Testing (Computer Testing)
  • Chemical Pit Covers
  • Modular Buildings