What it is
This is a silicone resin built on a trimethylsiloxysilicate framework and modified with long-chain C24-28 alkyl groups. The resin backbone forms a continuous, durable film on the skin, while the long alkyl chains add a wax-like, conditioning character and compatibility with oils and waxes. It is used to create even, long-wearing films that help distribute UV filters and pigments and improve the smoothness and durability of the applied layer.
Safety & warnings
Silicone resins and alkyl-modified siloxysilicates are generally well tolerated, non-sensitizing, and not commonly linked to comedogenicity. They are widely used as film formers in long-wear and sun-care products.
Origin & sourcing
Synthetic; a silicone resin chemically modified with long-chain alkyl groups.
Questions everyone asks
What is the benefit of the film it forms?
It creates a smooth, even, long-wearing film that helps keep the product layer uniform and supports consistent distribution of UV filters and pigments.
Is it a UV filter?
No. It is a film-forming silicone resin that improves wear and texture; it does not absorb or reflect UV light itself.