What it is
Ceresin is a hard, white-to-yellowish wax obtained by purifying ozokerite, a naturally occurring mineral wax. It raises melting point and viscosity, helps structure anhydrous and emulsion systems, and stabilizes oil phases against separation. In sunscreens it is especially useful in sun sticks and balms, where it provides firmness and a smooth, cohesive payoff.
Safety & warnings
Refined mineral waxes such as ceresin are inert and generally well tolerated, and they are not fragrance allergens. As an occlusive wax it can feel rich, so very acne-prone users may prefer to monitor heavily waxy products, but the wax itself is broadly considered low risk.
Origin & sourcing
Mineral-derived; produced by refining and bleaching ozokerite, a natural mineral wax.
History
Ceresin has long been used as a wax in cosmetics and other products as a purified alternative to crude ozokerite, valued for its consistent structuring properties.
Questions everyone asks
What is ceresin used for in sunscreen?
It is a structuring wax that thickens the formula and gives firmness and cohesion, making it especially common in sun sticks and balms.
Where does ceresin come from?
It is made by refining ozokerite, a naturally occurring mineral wax.