Polyisobutene
Synthetic Polymer
Polyisobutene is a synthetic polymer used to improve texture, gloss, and water resistance in cosmetic formulations. It has low skin absorption and is considered safe for topical use, but due to its persistence in the environment and poor biodegradability, it is classified as Use with Caution.
Why Oh Daisey rates it this way
Polyisobutene is a synthetic polymer used to improve texture, gloss, and water resistance in cosmetic formulations. It has low skin absorption and is considered safe for topical use, but due to its persistence in the environment and poor biodegradability, it is classified as Use with Caution.
What it does
Film Former; Binder; Emollient
How to read this rating
This rating reflects the Oh Daisey ingredient standard and the evidence currently available for cosmetic use. Product safety can also depend on concentration, exposure route, formulation, manufacturing quality, and individual sensitivity.