Coastal cities feature year-round marine salt fog, strong ultraviolet rays and high humidity. Commercial HVAC outdoor units made of galvanized steel will rust, blister and fade within 2–3 years under coastal climate if using ordinary solvent paint. Strict environmental limits on high-VOC coatings push HVAC manufacturers to adopt eco-friendly waterborne anti-corrosion solutions in 2026.

FLDC independent developed complete waterborne coating system exclusively for coastal HVAC frames, condensers and metal brackets:

1. Waterborne zinc phosphate primer: Good adhesion on galvanized steel, prevent flash rust during construction
2. Waterborne acrylic intermediate coat: Dense barrier block salt mist penetration
3. Waterborne aliphatic polyurethane topcoat: Long color retention, anti-chalking under strong sunlight Core Advantages: ✅ Ultra-low VOC, no irritating smell, comply coastal urban environmental inspection standards ✅ Outstanding neutral salt fog resistance up to 4000 hours for seaside service ✅ Quick air-dry formula, shorten factory assembly line production cycle ✅ Flexible film adapt thermal expansion of thin steel sheet ✅ Multiple industrial gray/white colors match HVAC equipment appearance Our waterborne HVAC coating has bulk export orders to Florida, Southeast Asia coastal HVAC factories. Contact us for free color card and factory wholesale price.