How we scored it
Where it comes from
Made by anionic polymerisation of petrochemical styrene and isoprene monomers into a styrene-isoprene block copolymer. Commercial cosmetic-grade material is not made from natural rubber.
In plain English
A film-forming ingredient used to create a flexible coating in products like nail polish. Made from two petrochemical building blocks, styrene and isoprene.
CosIng definition: Benzene, ethenyl-, polymer with 2-methyl-1,3-butadiene
Natural alternatives with the same function
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Albumen 100% natural originEgg white. Used in cosmetics to form a film on skin or hair and to help condition them.
Amorphophallus Konjac Root Extract 100% natural originA root extract from the konjac plant that helps form a light film on skin and hair and…
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References
- 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
- 2STYRENE/ISOPRENE COPOLYMER. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3STYRENE/ISOPRENE COPOLYMER. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=STYRENE/ISOPRENE%20COPOLYMER