Zinc Sulfide STD powder is a white to faint yellow powder insoluble in water and organic solvents. Applications in paints and coatings: white pigment in abrasion sensitive formulas; glass reinforced plastics GRPs: white pigment capable not to reduce resistance in GRPs; masterbatch and compounds: dry lubricants and additive capable to improve stability into finished product; brakes and friction material: dry lubricant and additive capable to improve stability into finished product; grease and oils: additive to reduce coefficient of friction and wear.