Polychem 7517-M-75 Alkyd resin OPC Polymers Alkyd Resins >> Medium-oil Coatings >> Solventborne mineral spirits, low aromatic POLYCHEM 7517-M-75 is a high solids medium oil alkyd for use in air dry / forced dry systems. Brush enamels or primers with VOC levels of 340-400 grams/liter can be formulated. This product is low-HAP and can be formulated into HAP-free coatings (below 1% HAP). Spray or dip primers/ Brush enamels Tofa Air drying/forced drying HAP-free, high solids, medium oil tofa alkyd resin. Used in air and forced dry HAP-free coatings for spray or dip primers and brush enamels. Offers very good non-yellowing characteristics.