Dow Corning (US), Evonik (Germany), Shin-Etsu (Japan), Momentive Performance Materials (US), Elkem (Norway), KCC Corporation (South Korea), Wacker Chemie (Germany), BYK Additives (Germany), Siltech (Canada), BRB International (Netherlands), Wynca, Acc Silicones, Struktol, Supreme Silicones, Harmony Additives, Elkay Chemicals, Graf Chemie, Afcona Additives, Mccoy, Silchem, Tri-Chem Industries, JAS Technologies, Allnex, Akrochem Corporation, Add Additives Bv