Overview
PU topcoats keep colour and gloss outdoors for years and protect the epoxy below from chalking. Colours usually follow RAL or the investor’s corporate colours.
For exposed steel in highly corrosive environments, a three-coat zinc, epoxy and PU system is the common build. PU is also used over intumescent coatings where the maker allows it.
Uses
- 01Exposed steelwork and canopies
- 02Topcoat over intumescent coatings
- 03Outdoor tanks and pipelines
- 04Architectural steel needing lasting colour
Selection and acceptance checks
- Check colour code, gloss and topcoat DFT
- Check compatibility with underlying coats
- Apply within allowed temperature and humidity
Reference standards
- ISO 12944-5
- ISO 12944-6
For reference only. The standards for each project follow its design documents, current Vietnamese codes and the investor’s requirements.
Reference brands
JotunNorwegian paint company making protective coatings for steel, fire protection, floor coatings and powder coatings.
AkzoNobel (International)Dutch paint group; International for protective and fire protection coatings and Interpon for powder coatings.
HempelDanish coatings maker of protective, fire protection and marine coatings.- Nippon Paint Nippon PaintJapanese paint group with decorative, industrial and floor coatings.
Brands are listed for reference; World Steel selects suppliers according to each project’s specification.
Sectors and solutions
Sectors
FDI factories Energy Infrastructure Agriculture and food
World Steel services
Steel structures and PEB Warranty and maintenance Expansion and upgrade
