Additol P 964 Cytec Surface Specialties North America South and Central America Catalyst / Accelerator Dispersing agents Powder coating Additol™ P 964 is a catalyst master batch designed for use in hybrid, TGIC or Araldite PT-910 systems. Additol™ P 964 contains 5 % active substance and is for indoor and outdoor use. Additol™ P 964 is easily handled and greatly improves dispersion of the catalyst in powder coating formulations. Catalyst master batch. Easily handled and greatly improves dispersion. Used for powder coating formulations. Designed for indoor and outdoor use.