Ingredient review

Acrylates/Beheneth-25 Methacrylate Copolymer

INCI: ACRYLATES/BEHENETH-25 METHACRYLATE COPOLYMER

A safe, synthetic film-former that helps products spread evenly, feel lightweight, and resist water or sweat.

beautyskincarefilm-former

In plain English

This ingredient is a synthetic polymer that forms a thin, flexible film on your skin or hair. It helps makeup and sunscreen stay put longer, gives lotions a silky feel, and can make products more water-resistant. Think of it like a gentle, invisible shield that helps your beauty products perform better without clogging pores or causing irritation.

Quick decision guide

Useful, but context matters

Acrylates/Beheneth-25 Methacrylate Copolymer is generally a lower-concern ingredient when the full formula suits your skin.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Acrylates/Beheneth-25 Methacrylate Copolymer.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic copolymer made from acrylic acid derivatives and beheneth-25 methacrylate. It is a film-forming agent that creates a flexible, breathable layer on the skin or hair.

How it works

When applied, the polymer chains spread out and link together to form a thin, even film. This film helps other ingredients adhere to the skin, improves water resistance, and gives a smooth, non-tacky finish. It also helps stabilize emulsions, preventing oil and water from separating.

Pros

Enhances wear and water resistance

Helps sunscreen and makeup stay effective longer, even during sweating or swimming.

Lightweight, non-greasy feel

Creates a smooth, silky finish without heavy oils, ideal for oily or combination skin.

Cons and cautions

Synthetic origin

Not suitable for those seeking 100% natural or organic formulations.

Potential tightness on sensitive skin

In high concentrations, the film may feel slightly drying or tight for very dry or compromised skin.

Best for

  • Anyone looking for long-wearing makeup or water-resistant sunscreen
  • People with normal to oily skin who prefer a matte, lightweight finish

Use caution if

  • Those who strictly avoid synthetic ingredients in their routine

Usage tips

Look for it in sunscreens and long-wear foundations for better staying power.
If you have dry skin, pair products containing this polymer with a good moisturizer underneath.

Safety summary

Acrylates/Beheneth-25 Methacrylate Copolymer is considered safe for cosmetic use with a low risk of irritation or clogging pores. It is not absorbed into the skin and has been reviewed by the Cosmetic Ingredient Review panel.

Research notes

Safety assessments by the Cosmetic Ingredient Review (CIR) and other regulatory bodies support its safe use in cosmetics. No significant human or environmental toxicity has been reported at typical usage levels.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has deemed it safe as used in rinse-off and leave-on products.
Common uses
Sunscreens, Foundations, Mascaras, Moisturizers, Hair styling products
Environmental note
As a synthetic polymer, it is not biodegradable. However, it is used in small amounts and is not known to bioaccumulate.

Good to know

  • This ingredient is considered safe by major regulatory bodies including the Cosmetic Ingredient Review (CIR) panel.
  • It is not absorbed into the skin; it stays on the surface to form its protective film.

Common questions

What is Acrylates/Beheneth-25 Methacrylate Copolymer in beauty products?

This ingredient is a synthetic polymer that forms a thin, flexible film on your skin or hair. It helps makeup and sunscreen stay put longer, gives lotions a silky feel, and can make products more water-resistant. Think of it like a gentle, invisible shield that helps your beauty products perform better without clogging pores or causing irritation.

What does Acrylates/Beheneth-25 Methacrylate Copolymer do in a beauty product?

When applied, the polymer chains spread out and link together to form a thin, even film. This film helps other ingredients adhere to the skin, improves water resistance, and gives a smooth, non-tacky finish. It also helps stabilize emulsions, preventing oil and water from separating.

Is Acrylates/Beheneth-25 Methacrylate Copolymer safe for most people?

Acrylates/Beheneth-25 Methacrylate Copolymer is considered safe for cosmetic use with a low risk of irritation or clogging pores. It is not absorbed into the skin and has been reviewed by the Cosmetic Ingredient Review panel.

Who should be careful with Acrylates/Beheneth-25 Methacrylate Copolymer?

Those who strictly avoid synthetic ingredients in their routine

Research sources

Cosmetic Ingredient Review (CIR) Safety AssessmentOpenEuropean Chemicals Agency (ECHA) InformationOpenPersonal Care Council - Ingredient DatabaseOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.