Sigmadur 550 by PPG is a two-component, aliphatic acrylic polyurethane finish engineered for high-performance protection in harsh environments. Designed for industrial and marine applications, this advanced coating offers exceptional durability, color and gloss retention, and unlimited recoatability, making it ideal for long-term exposure to atmospheric conditions.
Sigmadur 550 cures effectively at low temperatures down to -5°C (23°F) and provides robust resistance to splashes of mineral and vegetable oils, aliphatic petroleum products, paraffins, and mild chemicals. Its smooth finish and user-friendly application properties make it a reliable choice for a wide range of protective coating systems.
Unlimited recoatable for flexible maintenance and long-term durability
Outstanding resistance to atmospheric exposure
Excellent color and gloss retention
Cures at low temperatures (down to -5°C / 23°F)
Resists splash exposure from oils, paraffins, and mild chemicals
Good application properties for efficient, smooth finishes
Ideal as a finish coat in multi-layer protective systems
Steel structures exposed to outdoor weathering
Industrial facilities, refineries, power plants, and offshore installations
As a topcoat in aggressive environments requiring visual appeal and performance
Long-term maintenance programs requiring easy recoatability
Ideal over epoxy primers and intermediate coats for comprehensive corrosion protection
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