Film Former
BUTADIENE/ISOPRENE COPOLYMER
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A synthetic butadiene/isoprene rubber polymer used as a film former in long-wear cosmetics. The polymer itself is inert, but butadiene monomer is an IARC Group 1 carcinogen — purification matters.
Function
Skin benefits
- Synthetic elastomer film former
- Provides flexibility and adhesion
- Used in long-wear color cosmetics
Known concerns
- Butadiene monomer is IARC Group 1 carcinogen
- Residual monomer levels critical
- Microplastic-class scrutiny
- Limited cosmetic-specific reviews
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, so always read the physical product label and consult a healthcare professional for personal concerns.