Film Former
STYRENE/BUTADIENE COPOLYMER
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
SBR — a synthetic rubber polymer used as a film former in long-wear cosmetics. The polymer is inert; residual styrene monomer is the concern flagged by regulators.
Function
Skin benefits
- Film former, good wear in cosmetics
- Improves long-lasting finish
- Stable, inert polymer
Known concerns
- Residual styrene monomer if poorly purified — styrene is IARC 2A
- Microplastic concerns in rinse-off
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.