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: Composolite®


Composolite Colors

Size and Availability:

Sheet / Plate:
- Panel Size: 3”thk x 24”wide
- Connectors: 3-way connectors, toggles and/or hanger

Composolite is an advanced composites building panel system suitable for major load bearing structural applications. The modular construction system consists of a small number of interlocking fiber reinforced plastic (FRP) structural components produced by the pultrusion process. The main building panel is a 3" thick x 24" wide open ribbed panel. Panels can be connected by use of the 3-way connector, toggle connector and/or hanger.

This uniquely designed system of interlocking components makes it possible to design fiberglass structures at significantly lower costs for a broad range of construction applications. Composolite structures can be designed in "kit form" and shipped flat to the job site.

Materials of Construction

Composolite is a system of four interlocking components manufactured of pultruded fiberglass reinforced plastic. This construction makes Composolite particularly well-suited to outdoor use and/or corrosive environments.

System Design

Composolite combines manufacturing simplicity with an almost unlimited number of configurations.

The panels feature integrally molded longitudinal grooves into which a connector or toggle (of the same length or longer) is inserted during assembly. Three-way connectors allow the system components to turn corners and facilitate the joining of walls or sides. Toggles lock panels and connectors together securely.

For permanent structures, joints between panels and connectors are bonded during assembly.


  • Corrosion Resistant
  • Strong
  • Lightweight
  • Non-Conductive
  • Easy to Maintain
  • Cost Effective
  • Easy to Install
  • Interlocking Joints


  • FRP buildings
  • Bridge Decks
  • Cellular Enclosures
  • Platforms & Walkways
  • Tank Covers