Crylcoat 2494-6 Polyester resin Cytec Surface Specialties North America South and Central America Polyester Coatings Crylcoat™ 2494-6 is a exterior durable polyester resin that can be cured at low temperatures with 93/7 TGIC. Polyester resin. Exhibits exterior durability. Cured at low temperatures with 93/7 TGIC.