What it is
This ingredient is a long-chain alkyl-modified silicone resin built on a polypropylsilsesquioxane backbone, giving it a solid, wax-like character. It forms a flexible, cohesive film on the skin that helps hold pigments and UV filters in an even layer and improves the durability and wear of the finished product. It is frequently used in sunscreens and makeup where a smooth, long-lasting deposit is desired.
Safety & warnings
Silicone resins of this type are large, substantive molecules generally considered low in irritation and sensitization potential. As a film former it sits on the skin surface and is broadly regarded as well tolerated.
Origin & sourcing
Synthetic silicone resin.
Questions everyone asks
What does this silicone resin do in a sunscreen?
It forms a flexible film that helps keep UV filters and pigments in an even, longer-wearing layer on the skin and improves the product's finish.
Is it a silicone?
Yes. It is a wax-like silicone resin, used mainly for film formation and to improve texture and wear rather than for slip alone.