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Ingredient Facts
Polyurethane-8
AKA: Film-forming polymer
Ingredient · Film Forming · EWG: 4
Synthetic
Occlusive
Not Clean
Polyurethane-8 is a copolymer of polyethylene-poly(tetramethylene)glycol, propanoic anhydride, isophorone diisocyanate, and isophorone diamine
CAS #
-
Form
Powder
See origin →
Functions
Binding
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Plasticiser
Creates protective layer
Holds ingredients together
Adds flexibility
Traditional Use
A synthetic polymer developed in the mid-20th century for industrial applications. Used in cosmetics as a film-forming agent and texture modifier in formulations like foundations and primers.