What it is
This is a copolymer built from a hydroxy-functional dimethicone reacted with isophorone diisocyanate (IPDI) to form a silicone-urethane network. In formulations it forms a flexible film that improves the wear and even distribution of the product on the skin. It is a supporting ingredient that contributes to a smooth, conditioned finish.
Safety & warnings
Silicone-urethane film formers of this type are generally well tolerated and non-sensitizing in cosmetic use. It is not a recognized fragrance allergen.
Origin & sourcing
Synthetic. It is a copolymer of a modified dimethicone and isophorone diisocyanate, capped as an ethylcarbamate.
Questions everyone asks
What does this copolymer do?
It is a silicone-urethane film former that helps the product wear evenly and conditions the skin for a smooth finish.
Is it a UV filter?
No. It is a supporting film-forming ingredient and does not provide UV protection.