CathayCoat™ RS18 Red Iron Oxide strikes that coveted balance between price and performance. This pigment does not go through the extensive processing of our “Best Series” pigments, but it still provides the quality needed for many applications. Like all Red Iron Oxides, RS18, has excellent lightfastness, chemical and heat resistance. In normal applications it is considered a permanent pigment. The iconic Red American Barn is a testament to the durability of Red Iron Oxides.