What it is
This ingredient is a silicone-based crosspolymer combining dimethicone with a polypropylene glycol segment in a crosslinked network. In formulas it acts as a film former and texture modifier, contributing a smooth, velvety slip and a soft-focus, matte feel on the skin. It is common in sunscreens and primers where an even, lightweight finish is desired.
Safety & warnings
Silicone crosspolymers of this type are generally well tolerated and non-sensitizing, with a low likelihood of irritation. They are not associated with significant comedogenicity at typical use levels.
Origin & sourcing
Synthetic; manufactured by crosslinking silicone (dimethicone) chains with a bis-isobutyl PPG-20 component to form a polymeric network.
Questions everyone asks
Why is this silicone crosspolymer used in sunscreens?
It helps form a smooth, even film and improves the texture and finish of the product, giving a soft, lightweight feel on application.
Does it provide any sun protection?
No. It is a texturizing film former and carries no UV-filtering function on its own.