Synthetic · Nail Conditioning | Film Forming · EWG: 4
Plant-Derived
Occlusive
Skin Conditioner
Synthetic
Clean
A conditioning polymer that strengthens and protects nails, helping them stay flexible and resistant to breakage while maintaining moisture.
Plant-Derived
Synthetic. Polyurethane-51 is synthesized from polyols and isocyanates, which are petroleum-derived chemical precursors. It is produced through step-growth polymerization, where isocyanates react with polyols under controlled conditions to form the polymer chain.
Function
Nail Conditioning | Film Forming
Benefits
Nail Conditioning
Strengthens nails
Traditional Use
Synthetic polymer developed in the mid-20th century. Used in cosmetics as a film-forming and conditioning agent in hair and skin products.
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