Ingredient
Polyisobutene
Hydrogenated polyisobutene analogue
Polyisobutylene
What it is
A synthetic hydrocarbon polymer used as a thickener and light film-former that adds body and a cushiony glide to emulsions.
How it works
It thickens the oil phase and forms a flexible surface film that improves texture and helps limit water loss.
What it does
Emollient
Viscosity controlling
Film forming
Concerns to know
-
Well tolerated
No significant safety concern is reported for this ingredient as used in cosmetics.