Film Former
BIS-HEMA POLY(CAPROLACTONE/PENTAERYTHRITOL)/IPDI COPOLYMER
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A HEMA-end-capped urethane used in nail gels. HEMA monomer is a well-documented sensitiser — the EU banned HEMA in non-professional nail products in 2020 due to widespread allergy reports. Lower-yellow at best.
Function
Skin benefits
- Forms tough, flexible films
- Good adhesion in nail products
- Long-wear performance
- Compatible with UV-cure systems
Known concerns
- HEMA is a recognised contact sensitiser
- Residual HEMA banned in EU nail gels since 2020
- Trace residual IPDI — also a sensitiser
- Sensitisation risk for nail technicians
- Not biodegradable
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related film formers
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.