What it is
Polysilicone-9 is a silicone-based polymer belonging to the family of dimethicone-derived materials. On skin it forms a thin, flexible film that delivers a soft, silky, dry-touch feel and helps products spread evenly. In sunscreens it is often used to improve sensory feel, support even distribution of filters, and give a smooth finish without heaviness.
Safety & warnings
Silicone polymers such as Polysilicone-9 are generally non-irritating, non-sensitizing, and well tolerated, and as large polymers they remain on the skin surface rather than being absorbed. They are not typically associated with comedogenicity.
Origin & sourcing
Synthetic; a silicone polymer manufactured from siloxane chemistry.
Questions everyone asks
What does Polysilicone-9 do in sunscreen?
It forms a light film that smooths application, improves slip, and leaves a dry, silky finish.
Is Polysilicone-9 a silicone?
Yes, it is a crosslinked silicone polymer used for its conditioning and film-forming properties.