4-Rail™ Fiberglass Post


4-Rail™ Fiberglass Post

Rhino’s 4-Rail fiberglass composite post is our most drivable fiberglass marker and can be installed in almost any soil condition. The design allows for easy stacking and storing and has the durability to withstand repeated impacts when hit from the front or back. Our patented PolyTech™ Coating is an optional add-on, and it offer superior UV protection (read more below).


  • Pultruded fiberglass set in a composite resin
  • Side-rails and reinforcing rib provide strength and rigidity
  • Temperature stable
  • Fire resistant
  • Pointed end for easy installation
  • Posts with PolyTech Coating™ come with a 10-year warranty

Product Details

Lengths: 62" | 66" | 72"

Standard Post Colors:

  • Red
  • Orange
  • Yellow
  • Green
  • Blue
  • Purple
  • White
  • Brown

Our patented PolyTech Coating™ blocks damaging UV rays, prevents fiberbloom (bottom picture), and is available on all of our Fiberglass Composite posts and comes with a 10-year warranty.

2,000-hour Weatherometer Testing 

      Regular coating       vs.         PolyTech Coating

Traditional fiberglass posts get fuzzy over time when the damaging effects of UV light cause the surface resin of the post to evaporate. Without the surface resin, the glass fibers become exposed, making the post a safety hazard.