Polyglyceryl-6 Isostearate Good Emollient Hydration Polyglyceryl-6 Isostearate description Polyglyceryl-6 isostearate is a synthetic mixture of fatty acids from stearic acids and a glycerine polymer. Multiple roles in cosmetics include emollient, emulsifier, and surfactant, making it a good choice for hydrating cleansers. Related ingredients: Glycerin