What it is
Polyurethane-15 is a water-dispersible synthetic polymer that dries to a flexible, continuous film. In sunscreens it improves the uniformity and durability of the applied layer, helping UV filters and pigments stay evenly distributed and resist rub-off. It also contributes to a pleasant, smooth skin feel and can help with long-wear performance.
Safety & warnings
Film-forming polymers of this type are generally inert and well tolerated, with low irritation potential, as they remain on the skin surface.
Origin & sourcing
Synthetic; a polyurethane polymer manufactured for use as a cosmetic film former.
Questions everyone asks
What is polyurethane-15 used for in sunscreen?
It is a film former that helps create a smooth, even, flexible layer so that UV filters stay uniformly distributed and the product wears well.
Does it absorb UV light?
No. It is not a UV filter; it supports the performance of the actual UV filters by forming an even film.