Crylcoat 2421-5 TMA-free carboxylated polyester resin Cytec Surface Specialties North America South and Central America Polyester Coatings Crylcoat™ 2421-5 is a medium reactive, TMA-free carboxylated polyester resin for use with TGIC. Formulations based on Crylcoat™ 2421-5 exhibit outstanding flow and are heat stabilized. Can be considered for PCM applications. TMA-free carboxylated polyester resin. Exhibits outstanding flow and heat stabilized. Used for PCM applications.