What it is
This ingredient is a crosslinked silicone (silsesquioxane) network carrying phenyl groups, supplied as a resin or powder. In sunscreens and color cosmetics it is used to form a cohesive film on the skin surface, improving wear, smoothness, and even distribution of the formula. Phenyl-modified silicones also contribute a soft, non-greasy skin feel.
Safety & warnings
Crosslinked silicone resins are inert, non-irritating, and generally very well tolerated, including on sensitive skin. They are not classed as fragrance allergens. Silicone films of this type are typically regarded as low risk for clogging pores.
Origin & sourcing
Synthetic silicone polymer.
Questions everyone asks
What is this silicone crosspolymer used for?
It is a film former that helps a sunscreen or makeup spread evenly and wear smoothly on the skin.
Is it a UV filter?
No. It does not provide UV protection; it is a structural film-forming and conditioning agent in the base.