Ingredient dictionary

Acrylates Copolymer

Also listed as: Styrene/Acrylates Copolymer, Styrene/Acrylates/Ammonium Methacrylate Copolymer

A film-forming polymer made from linked acrylic building blocks. Its main job is to form a thin, flexible layer on skin, hair or lashes. It is on the label of 145 products in our library. Checked against our library November 6, 2026.

What Acrylates Copolymer does

Forms a thin, flexible film on the surface
Helps hold other ingredients in place
Adds body and a smooth feel

Acrylates Copolymer is made by linking small building blocks called acrylates into long chains. Similar acrylate chains are used in paints and coatings, and in cosmetics the polymer is often supplied as a water-based liquid that blends easily into creams and washes. Versions with the styrene-based names use styrene as one of the building blocks.

Formulators use it because it dries into a thin, flexible film that holds other ingredients in place. In sunscreens it can help keep UV filters spread evenly on the skin. In mascara it helps lashes hold color and resist smudging. In lotions and cleansers it adds body and a smooth feel without a heavy finish.

Good for

Suits people who want long-wearing mascara, sun care or everyday creams that feel smooth and stay put.

Frequently asked questions

Is Acrylates Copolymer safe to use?

It is generally well tolerated and is used in many everyday products. Like any ingredient, it can rarely bother someone with a specific sensitivity. If a product with it stings or itches, stop using it and check with a dermatologist or doctor.

Does Acrylates Copolymer feel sticky on skin?

Usually not. Because it dries into a thin film, it tends to feel smooth rather than tacky, and it is often used in lightweight lotions and gels. How it feels depends on the whole formula, so the other ingredients matter too.