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Protective Coatings Testing and Certification

Our program evaluates organic and metallic corrosion protection coatings to be certified as UL Recognized Components. Having your products Recognized and published in our iQ Database makes them easily searchable — giving you a leg up on the competition.

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Certify your protective coatings as UL Recognized Components

Our certification program for protective coatings covers test procedures and performance criteria for the evaluation of organic and metallic corrosion protection coatings of steel enclosures. Protective coatings that meet our requirements are certified as UL Recognized Components and are published in UL Solutions’ Product iQ Database.

Benefits of our protective coatings testing and certification services

Organic coatings

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, we might conduct a salt-spray (fog) test, moist carbon dioxide-sulfur dioxide-air test and/or a light and water test for clear coatings.

Traceability of protective coatings

We also offer 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 traceability along the supply chain and verification of the correct application process for UL Recognized component organic coating systems. 

Metallic coatings

DTHW covers metallic coatings — zinc, zinc-iron, aluminum-zinc, zinc-aluminum-magnesium and zinc-nickel alloy — and the substrates to which they are applied. Metallic coatings are intended to be applied to exterior and interior surfaces of steel enclosures of outdoor-use electrical equipment to protect the metal against atmospheric corrosion.

Products and Standards

Protective coatings are covered under multiple categories and corresponding category code numbers (CCNs) based on the type of coating and end-use application.

Benefits of our protective coatings testing and certification services

With expertise in safety science reaching back to 1894, UL Solutions is uniquely positioned to provide a complete view of how your products will function within a given system. This is particularly critical in the plastics and components industry. Interactions between substances, parts, systems and the environment can cause of a significant number of hazards and failures, which are rarely apparent when components are tested individually.

Our technical experts can also help you align your products to the appropriate UL Certification category and applicable Standards. This enables manufacturers of UL Certified products to easily source components that demonstrably meet their compliance needs and project specifications.

Choose UL Solutions to test and certify your protective coatings

UL Solutions' comprehensive testing, certification, assessment and regulatory compliance services are designed to foster innovation, enhance product and process quality, enable safety and, ultimately, help our customers meet their business goals.

Our broad capabilities enable us to help you address a wide variety of key business needs that may arise throughout your product development life cycle and deployment phase. Working with one provider allows you to take advantage of our cost- and time-saving service bundles, and our integrated testing and certification plans allow you to achieve your go-to-market plans in a timely manner.

Even more so, we support you in your drive to protect public safety and brand value, mitigating your risk with quality assurance and supply chain compliance services. Our trustworthy reputation provides an important product differentiator in a crowded marketplace, communicating safety and quality to original equipment manufacturers (OEMs), purchasers and regulatory authorities.


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