Polyurethane-35 is a synthetic polymeric film-forming agent used in cosmetic formulations, particularly nail products and some skincare and color cosmetics, to create a flexible, water-resistant, and durable film on the surface. It helps improve wear, gloss, and the longevity of the applied product.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation | Rare | Mild localized irritation possible, generally in sensitive individuals. |
Allergic contact dermatitis | Rare | Sensitization is uncommon but can occur, often linked to residual isocyanate monomers. |
Eye irritation | Rare | May occur with accidental contact in liquid formulations. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.