Film Former
BUTENE/ISOBUTENE COPOLYMER
Safety score · 0–100
Good
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A simple hydrocarbon polymer of butene and isobutene that forms a light, non-greasy protective film on skin and hair. Saturated and chemically inert, with a long history of safe cosmetic use; petroleum sourcing is the main sustainability caveat.
Function
Skin benefits
- Inert hydrocarbon polymer
- Creates non-greasy protective film
- Stable across temperature ranges
Known concerns
- Petroleum-derived (sustainability/sourcing question)
- Not biodegradable
- Possible trace volatile residuals at low MW
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.