What it is
Cetearyl Dimethicone Crosspolymer is a silicone (dimethicone) network that has been crosslinked and modified with long cetyl/stearyl alkyl chains. The crosslinked structure lets it swell in oils and silicones to form a soft gel, while the alkyl groups improve compatibility with cosmetic oils. In sticks, balms, and anhydrous sunscreen bases it helps thicken the oil phase, stabilize the formula, and deliver a smooth, silky skin feel.
Safety & warnings
Crosslinked alkyl-silicone polymers are generally considered non-irritating and non-comedogenic in typical use, and they are not fragrance allergens.
Origin & sourcing
It is a synthetic silicone-based polymer.
Questions everyone asks
What does Cetearyl Dimethicone Crosspolymer do?
It thickens and gels the oil or silicone phase of a formula and helps give products a smooth, silky texture.
Why is it used in sunscreen sticks?
Its ability to gel oils helps structure anhydrous bases like sticks while keeping the application smooth.