What it is
Polyester-5 is a synthetic polymer of the polyester class, formed from repeating ester linkages. In sunscreen and color formulas it is used mainly as a film former, laying down a continuous, flexible film that helps the product wear evenly and supports the even distribution of UV filters and pigments. It contributes to a smooth, set finish.
Safety & warnings
As a high-molecular-weight film-forming polymer, it remains on the skin surface and is generally well tolerated with low sensitizing potential. It is not associated with notable comedogenicity.
Origin & sourcing
Synthetic; a man-made polyester polymer.
Questions everyone asks
What is Polyester-5 used for?
It is a film former that helps the product dry down into an even, flexible layer, supporting consistent wear and distribution of UV filters and pigments.
Does Polyester-5 absorb into skin?
No. It is a large polymer that stays on the skin surface as a film rather than penetrating.