Polyurethane-17
AKA “Polyurethane-17, PU-17
Synthetic
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Ingredient Facts
Polyurethane-17
AKA: PU-17
Synthetic · Film Forming | Skin Conditioning · EWG: 4
Plant-Derived
Occlusive
Skin Conditioner
Synthetic
Clean
Creates a lightweight, breathable layer on skin that helps makeup and skincare products stay put throughout the day while maintaining a natural feel.
CAS #
347175-78-4
Form
Powder
Plant-Derived
Synthetic. Polyurethane-17 is synthesized from polyols and isocyanates, organic compounds derived from petroleum feedstocks. It is produced through condensation polymerization, where polyols and isocyanates react to form the polymer chain.
Function
Film Forming | Skin Conditioning
Benefits
Creates Protective Barrier
Traditional Use
Modern synthetic polymer used in cosmetics for film-forming and conditioning purposes. Created to enhance product stability and provide improved wear characteristics.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
EWG Score4
CIR Safety Findings
medical-approval, all-shades-safe, Not a Sensitizer
Regulatory Status
USAunder review
EUpermitted
JAPANpermitted
CANADApermitted
Verified Feb 2026
Data: CosIng · EWG · CIR
Polyurethane-17 — Duck Heart Ghost