Marine PU coatings (hulls and decks)

Marine coatings are coatings applied to hulls and structures of vessels (commercial ships, yachts, fishing vessels, offshore platforms) for protection against the marine environment — an extraordinarily aggressive environment that combines saltwater, intense UV, biological fouling, continuous abrasion and wet-dry cycling. Complete systems are typically multilayer: zinc-rich anticorrosive primer (galvanic steel protection), high-build epoxy intermediate coat (water barrier), and aliphatic polyurethane topcoat (UV protection, color and gloss retention, aesthetic finish). PU is dominant in topcoats because it combines superior UV durability, high gloss maintained for years, ease of maintenance and cleaning. On premium vessels and yachts, aliphatic PU is standard in visible areas; on commercial ships, it is used in areas where aesthetics matter (superstructure, deckhouses). Anti-fouling (a layer that prevents algae and barnacle attachment) can be PU-based with controlled biocides.