International Standards - Norms

Understand international standards and regulations for technical coatings. RD Academy helps you master the industry’s quality, safety, and performance benchmarks.

  • What Does C5 Very High Mean?

    What Does C5 Very High Mean?
    04/04/2025

    In the ISO 12944 standard, which defines corrosion protection for steel structures using protective paint systems, the C5 Very High (C5-VH) classification refers to the most severe atmospheric corrosion environments – C5 – with the demand for a long durability – Very High / VH – of the coating system.

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