Snapshot
- Overview
- A synthetic polymer that helps makeup stay put without smearing.
- Category
- Tone/Texture
- Type
- Film Former
Hydrogenated Styrene/Isoprene Copolymer
Hydrogenated styrene/isoprene copolymer is a synthetic polymer made by saturating a styrene-isoprene backbone to improve stability and clarity. It forms flexible films, adds tack, and boosts texture in balms, mascaras, and long-wear cosmetics.
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Our take
Is Hydrogenated Styrene/Isoprene Copolymer a Good Ingredient?
Rated Good because it forms clear, flexible films that improve adhesion and wear in color cosmetics while staying stable over time. It delivers dependable hold and texture control with no significant sensitization reports, though its role is mainly cosmetic rather than skin-benefiting, which caps it at Good.
What it does
Skin Benefits
Creates a flexible layer that helps makeup stay put and resist smearing. Contributes to a smoother, more uniform finish with better grip on skin or lashes.
Where you'll find it
Uses in Skincare & Cosmetics
Frequently used in mascaras, liquid eyeliners, and brow products to improve hold. Also included in balms and transfer-resistant lip formulas for longer wear.
Before you use it
Safety
Considered inert for most skin types; may cause temporary eye or skin irritation if the product migrates into eyes or is removed too aggressively. No known specific regulatory limits in cosmetics when used as intended.
Products with Hydrogenated Styrene/Isoprene Copolymer
