Film Former
POLYISOBUTENE
Safety score · 0–100
Good
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A synthetic polymer that makes lip products glossy and long-wearing — it's what gives lip gloss its shine. Inert on skin, well-tolerated and with no documented safety flags.
Skin benefits
- Glossy long-wear film in lip products
- Lightweight emollient feel
- Highly stable, no oxidation
- Decades of cosmetic use
Known concerns
- Petroleum-derived (sourcing preference, not safety)
- Mild occlusivity on acne-prone skin
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.