PPG SigmaCover 522 is a two component micaceous iron oxide pigmented polyamide cured epoxy primer/sealer/coating.
This multi purpose product is excellent as it can be used as an undercoat or topcoat and is part of the fantastic range of SigmaCover products that can also be used as a surface sealant.
Best Uses
PPG SigmaCover 522 can be used in industrial, coastal, or chemically contaminated conditions where pollution is of a high level.
Excellent adhesion to, and sealing of, weathered-, cleaned-, zinc-rich primers and metal-sprayed steel
Good adhesion to properly pretreated galvanized steel
Can be used in systems for atmospheric or water-immersed exposure conditions
Good resistance to industrial- or chemical-contaminated atmospheric exposure conditions
Good abrasion and impact resistance
Pass cryogenic cyclic test from -196°C (-321°F) to 140°C (284°F)
Resistant to temperatures up to 200°C (390°F) in dry atmospheric exposure conditions
Prevents Corrosion Under Insulation (CUI)
Application
Blast clean steel to ISO-Sa2 1/2. Substrate temperature during application and curing should be over 10°C. Mix base and hardener at temperatures preferably above 15°C. Thinner should be added after mixing the components.