
A C3 coating is a certified corrosion protection system for steel structures exposed to a moderately aggressive outdoor environment. Examples include bridge railings, steel structures of movable bridges, lock gates and other infrastructural applications where a C3 classification is mandatory according to ISO 12944.
The Korthals C3 system consists of three layers that work together as a complete protective unit: an epoxy primer, an epoxy midcoat and a durable acrylate-polyisocyanate topcoat. Each product in the system has been developed for maximum adhesion, corrosion resistance and a long service life, even under outdoor conditions.
Download product informationOur three-layer C3 coating system is certified in accordance with the applicable standards. You can rely on proven protection.
Korthals has been developing paints and coatings for the most demanding industrial applications for more than a century.
Whatever color, texture, or composition you require, you can always count on fast delivery.




Korthals protective coatings are available in many different colors. Thanks to our unique Pro-Colour mixing system, you are guaranteed a perfect color!



























