Crylcoat 1658-5 Carboxylated polyester resin Cytec Surface Specialties North America South and Central America Polyester Coatings >> Powder Coatings Powder coating Crylcoat™ 1658-5 is a highly reactive carboxyl functional polyester resin for use with epoxy resins EEW 700-900 in ratios from 55/45 to 60/40 to manufacture hybrid powder coatings. Formulations containing Crylcoat™ 1658-5 exhibit high reactivity, scratch resistance and good overall properties. Carboxylated polyester resin. Exhibits high reactivity, scratch resistance and good overall properties. Used for manufacture of hybrid powder coatings.