Polychem 7038-M-60 Alkyd resin OPC Polymers Alkyd Resins >> Medium-oil Coatings >> Solventborne mineral spirits, low aromatic POLYCHEM 7038-M-60 is a medium oil soya alkyd designed as a vehicle for maintenance and equipment enamel. This product is low-HAP and can be formulated into HAP-free coatings (below 1% HAP). soya Air drying Low-HAP, air drying, medium oil soya alkyd resin. Used in HAP-free coatings as a vehicle for maintenance and equipment enamel.