Poly Sorbate 20INCI: Polysorbate 20 Polysorbate 20 is a gentle, oily, liquid cosmetic additive that functions as a nonionic surfactant and wetting agent that enhances the spreadability of liquids. As a solubilizer, it helps both essential oils and fragrance oils to attach to various types of cosmetic bases, including liquid, cream, and gel bases, and thereby prevents the oils and bases from separating. As a dispersant, it also helps to diffuse oils throughout water