UL’s certification program for protective coatings covers test procedures and performance criteria for the evaluation of organic and metallic corrosion protection coatings of steel enclosures. The general use of these coatings is for protection of the metal against atmospheric corrosion when applied to surfaces of steel enclosures, typically in outdoor-use environments. Depending on a product’s intended usage, UL might conduct a salt-spray (fog) test, moist carbon dioxide-sulfur dioxide-air test, and/or a light and water test for clear coatings, among other tests.

UL also offers a corrosion protection coating traceability program intended to eliminate the uncertainty of the protective coating identity and application process in an end-use product. The program provides both traceability along the supply chain and verification of the correct application process for UL Recognized component organic coating systems. Protective coatings applied under this program meet the requirements in ANSI/UL 1332, the Standard for Safety of Organic Coatings for Steel Enclosures for Outdoor Use Electrical Equipment.

Protective coatings that meet UL’s requirements are certified as UL Recognized Components and are published in UL’s Online Certifications Directory.