Crylcoat 2818-0 Hydroxyl functional polyester resin Cytec Surface Specialties North America South and Central America Polyester Coatings Crylcoat™ 2818-0 is a hydroxyl functional polyester resin for use with blocked aliphatic and aromatic isocyanates. Crylcoat™ 2818-0 is also suitable for use with polyanhydride hardeners like Beckopox™ EH 694 to obtain high Tg thermally resistant coatings. Hydroxyl functional polyester resin. Suitable for use with polyanhydride hardeners. Used to obtain high Tg thermally resistant coatings.