Film Former
METHYLBUTENE/METHYLSTYRENE/PIPERYLENE COPOLYMER
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A hydrocarbon resin used as a tackifier or film former. The cured polymer is inert, but residual styrene-class monomers are an IARC 2B carcinogen — purity matters.
Skin benefits
- Provides film and tack in cosmetics
- Useful in long-wear formulas
- Cured polymer inert on skin
Known concerns
- Residual styrene monomer is a 2B carcinogen
- Petrochemical hydrocarbon resin
- Limited cosmetic safety dossier
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.