Additol P 824 Hydroxylated polyester matrix Cytec Surface Specialties North America South and Central America Flow / Levelling agent Powder coating Additol™ P 824 is a flow promoter masterbatch for use in powder coatings containing 15% active agent in an outdoor resistant hydroxylated polyester matrix. An addition of 3-5% (by weight) to a powder coatings formulation increases gloss and is compatible with nearly all powder coating systems. Flow promoter masterbatch. Increases gloss and is compatible with nearly all powder coating systems. Used in powder coatings.