Marathon 550 is a surface tolerant, abrasion resistant epoxy primer for high corrosivity areas. Marathon 550 is suitable for environments with very high corrosivity, such as splash zones or tidal zones. It can be used as a primer, midcoat, finish coat or as a single-coat system in atmospheric and immersed environments – and will continue to cure when immersed in water. Marathon 550 is surface-tolerant and can be applied on moist substrates and has excellent resistance to cathodic disbonding. Marathon 550 is suitable for properly prepared carbon steel, galvanised steel, stainless steel, aluminium and concrete substrates.