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Ingredient Facts
Polyurethane-27
AKA: PU-27
Hair Conditioning · Film Forming · EWG: 4
Synthetic
Occlusive
Skin Conditioner
Barrier Support
Hair Care
Not Clean
Polyurethane-27 is a complex polymer that is formed by the reaction of Polyperfluoroethoxymethoxy Difluorohydroxyethyl Ether and isophorone diisocyanate (IPDI) to form a prepolymer. The prepolymer is further reacted with the triethylamine salt of 3-hydroxy-2-(hydroxymethyl)-2-methyl-1-propionic acid
CAS #
328389-91-9
Form
Powder
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Protecting
Helps rebuild and strengthen your skin barrier — the invisible shield that keeps moisture in and irritants out. Essential after over-exfoliating or harsh weather.
Nourishes & Protects
Traditional Use
Modern synthetic polymer used in cosmetics for film-forming and conditioning purposes. Developed to improve product texture, stability, and protective properties.