Outdoors, the deciding factor isn't mechanical wear but ultraviolet light and moisture — a powder that performs flawlessly indoors can fade on a facade within a season.
We specify UV-resistant polyester systems for outdoor work, and super-durable systems where exposure is severe: coastal air, industrial atmospheres, high elevations.
Film thickness is increased for outdoor parts, typically to 80–100 µm; a thin film leaves weak points where moisture reaches the metal and corrosion begins.
Galvanised surfaces need extra care in pre-treatment: gas released from the zinc layer during curing is a known cause of pinholing on outdoor work.