What it is
It is a dimethicone (silicone) backbone modified with water-loving PEG groups, which makes it function as a mild emulsifier and wetting agent. It helps disperse pigments and UV filters, stabilizes water-in-oil and water-in-silicone emulsions, and contributes a smooth, silky feel.
Safety & warnings
Generally well tolerated and widely used; considered a mild surfactant.
Origin & sourcing
Synthetic silicone-polyether copolymer.
Questions everyone asks
What does PEG-10 dimethicone do?
It is a silicone emulsifier that blends water and oils and helps spread pigments and filters evenly.
Is it drying?
No, it is a mild conditioning emulsifier rather than a harsh cleanser-type surfactant.