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Molded or Pultruded Grating?

We carry two types of Fiberglass Reinforced Polymer (FRP) grating – molded and pultruded – and we are often asked about the differences between the two. Molded grating ,Redco™ DURAGRATE®, is easier to produce and costs less. Molded grating provides a corrosion resistant, non-conductive material that costs less than pultruded grating. However, there are disadvantages to the material that one must consider:

-Limited profile shapes

-Air bubbles in the molding process cause exposure to chemical attack

-More difficult to cut and fabricate with

-Higher resin content results in a more brittle material

Pultruded grating, our Redco™ DURADEK®, is a superior grating material offering significant advantages over molded grating. It can be customized to fit a wide-range of profiles and the pultrusion process results in a consistent material with glass fibers suppressed by a surfacing veil that provides uniform protection. The silica-grit surface provides excellent anti-slip properties and its added glass content results in a stronger composite. This illustration shows a quick comparison of the material.

Molded vs. Pultruded


We strongly believe in the properties of both our Redco™ DURAGRATE® and our Redco™ DURADEK® but, if possible, pultruded grating is a better choice in most applications. We understand many factors affect the purchase decision so we ask you to contact us to help discover which choice is appropriate for your application.

CDN: 1 800 667 0999
USA: 1 866 733 2684