Butylene/Ethylene/Styrene Copolymer

Butylene/Ethylene/Styrene Copolymer is a synthetic triblock polymer made of olefin and styrenic segments. It's used to form flexible films, adjust viscosity, and help suspend pigments in gels, mascaras, and long-wear color products.
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Ingredient Snapshot

Overview
A polymer that helps color cosmetics resist smudging.
Category
Tone/Texture
Type
Film Former

Ingredient Ratings

Overall Rating

Fair

Comedogenic Risk

None

Skin Benefits

Helps color stay put with a flexible, comfortable film that resists smudging and transfer, contributing to a smoother, more uniform finish.

Uses In Skincare & Cosmetics

Often found in eyeliners, brow gels, and liquid lipsticks for hold and wear, and also used in styling gels and pomades to boost texture and staying power.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Generally considered inert with low irritation potential, but residue buildup or flaking near the eyes can bother sensitive users. Use an appropriate cleanser or oil-based remover to limit rubbing and reduce the chance of irritation.

Is Butylene/Ethylene/Styrene Copolymer a Good Ingredient?

It forms flexible films that improve wear but provides minimal direct skin benefit and can be harder to remove, which is why it's rated Fair; the occlusive film or removal friction may trigger irritation or clogged pores for some users.

Products with Butylene/Ethylene/Styrene Copolymer

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