The Industry Standard for Utility Line Marking
Accidental dig-ins and utility strikes are expensive, dangerous, and almost always preventable with clear, durable above-ground marking. The Carsonite Model CRM Fiberglass Utility Marker was the first fiberglass composite marker to hit the market, and it remains the most widely used utility marker in the industry — the reference point every other flexible marker gets compared against.
Three-Rail Design Built for Impact
The CRM’s signature three-rail cross-section isn’t just for looks. Two side ribs shield the reflective decal or sheeting from vehicle impacts and debris, protecting the visible marking that keeps crews and equipment operators aware of buried lines. A third rib on the back adds structural strength exactly where it’s needed for driving the marker into hard, compacted, or rocky soil — cutting installation time without sacrificing the post’s ability to flex and rebound after impact instead of snapping.
Built to Outlast the Elements
Carsonite’s fiberglass composite construction resists harsh weather, corrosion, UV exposure, and fading — meaning the marker keeps doing its job season after season without the color fade or brittleness that shortens the service life of cheaper plastic markers. The composite build also flexes on impact from vehicles or equipment rather than shattering, so a single accidental strike doesn’t mean an immediate replacement.
Straightforward Utility Marking, at Scale
Whether you’re marking a single service line or laying out marker posts along miles of pipeline or utility corridor, the CRM installs quickly with a standard post driver and holds up to repeated exposure without maintenance. Available in a range of standard colors so you can color-code by utility type (gas, water, electric, telecom) per your organization’s marking standards.
Features at a Glance
- First fiberglass composite utility marker in the industry
- Three-rail design: side ribs protect decals, back rib adds driving strength
- 72″ length (variable)
- Resists weather, corrosion, UV fading, and vehicle impact
- Compatible with Carsonite post drivers, post pullers, and pilot hole drivers
- Compatible with reflective sheeting, decals, and Direct Graphics options
Available Colors
- White
- Yellow
- Brown
- Orange
- Blue
- Custom colors available on request
Built For
Gas, water, and electric utility marking • Pipeline right-of-way identification • Telecom and fiber line marking • Municipal and DOT utility location programs • Damage prevention programs for underground infrastructure