POLYURETHANE-53 is graded A (Safe) by Expert·ING, based on COSING regulatory data.
POLYURETHANE-53
Safety grade: A
Polyurethane-53 is a synthetic polymer that forms a protective film on the nail surface. It acts like a flexible coating that helps strengthen and condition nails while providing a smooth finish.
This ingredient conditions and strengthens nails by creating a protective barrier that helps prevent breakage, brittleness, and moisture loss.
Graded using: COSING.
Last verified: May 26, 2026
Other Nail Conditioning ingredients
- COMMIPHORA MYRRHA RESIN EXTRACT — Grade A
- ECHINACEA ANGUSTIFOLIA ROOT EXTRACT — Grade A
- VACCINIUM MYRTILLUS LEAF EXTRACT — Grade A
- 2-METHYLPROPANAL — Grade A**
- 4,4'-ISOPROPYLIDENEDIPHENYL/EPICHLOROHYDRIN COPOLYMER DIACRYLATE — Grade A
- ACETALDEHYDE — Grade F**
- ACRYLIC ACID — Grade A**
- AMP-ISOSTEAROYL HYDROLYZED SILK — Grade B