The most effective occlusives are white petrolatum (USP grade), mineral oil, squalane, lanolin, beeswax, and plant-derived waxes like candelilla or carnauba. A cosmetic chemist may layer in emollient esters such as isopropyl myristate for improved skin-feel, plus antioxidants like tocopherol to prevent oxidation of the oil phase over time.
Read the full guide on how to find a cosmetic chemist for slugging occlusive balm →