Ingredient review

PEG-23 Methacrylate Copolymer

INCI: METHOXY PEG-23 METHACRYLATE/GLYCERYL DIISOSTEARATE METHACRYLATE COPOLYMER

A synthetic film-former that helps makeup and sunscreen last longer, but may feel heavy on some skin types.

beautyskincarefilm-former

In plain English

This ingredient is a type of plastic-like polymer that creates a thin, flexible film on your skin. It helps makeup stay put, resist water and sweat, and gives a smooth, even finish. Think of it like a clear, invisible shield that holds your makeup in place.

Review score

Safety, usefulness, and evidence

3.5Good
3.5/ 5

Potentially useful with some tradeoffs

The evidence base is useful, but some claims depend heavily on the formula.

Risk flags are low for most users, though the finished product can still irritate.

Source
synthetic
Evidence
moderate
Irritation
low
Clogging risk
low
How reviews are scored

Quick decision guide

Useful, but context matters

PEG-23 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 PEG-23 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 methacrylate and diisostearate units, designed to form a flexible film on skin or hair.

How it works

When applied, the polymer chains spread out and link together as the solvent evaporates, creating a continuous, water-resistant film. This film helps other ingredients (like pigments or UV filters) adhere better and last longer.

Pros

Long-wear performance

Helps makeup and sunscreen stay put for hours, even in humid or sweaty conditions.

Smooth finish

Creates an even, non-greasy film that can improve the texture of a product on the skin.

Cons and cautions

Potential tightness

The film can feel drying or tight on already dry or dehydrated skin.

Removal difficulty

May require a double cleanse or oil-based makeup remover to fully wash off.

Best for

  • People who want long-lasting makeup
  • Those who need water-resistant sunscreen or mascara

Use caution if

  • Those with very dry or sensitive skin who find film-formers uncomfortable

Usage tips

Use an oil-based cleanser or micellar water to remove products containing this polymer.
Layer a hydrating serum or moisturizer underneath if you have dry skin.

Safety summary

Considered safe for cosmetic use at typical concentrations. Low irritation and comedogenic potential, but may feel drying for some. Always patch test if you have sensitive skin.

Research notes

Limited independent studies on this specific copolymer, but the broader class of methacrylate copolymers is well-studied and considered safe in leave-on and rinse-off cosmetics.

Common label clues

Typical concentration
1% to 10% depending on formula
Regulatory status
Approved for use in cosmetics globally, including by the FDA and EU CosIng database, with no known restrictions at typical concentrations.
Common uses
Long-wear foundations, Waterproof mascaras, Sunscreens, Lip products
Environmental note
As a synthetic polymer, it is not biodegradable and may contribute to microplastic pollution. Some brands are moving toward bio-based alternatives.

Good to know

  • This ingredient is often found in 'transfer-proof' or '24-hour wear' makeup formulas.
  • It is not known to clog pores, but individual reactions vary.

Common questions

What is PEG-23 Methacrylate Copolymer in beauty products?

This ingredient is a type of plastic-like polymer that creates a thin, flexible film on your skin. It helps makeup stay put, resist water and sweat, and gives a smooth, even finish. Think of it like a clear, invisible shield that holds your makeup in place.

What does PEG-23 Methacrylate Copolymer do in a beauty product?

When applied, the polymer chains spread out and link together as the solvent evaporates, creating a continuous, water-resistant film. This film helps other ingredients (like pigments or UV filters) adhere better and last longer.

Is PEG-23 Methacrylate Copolymer safe for most people?

Considered safe for cosmetic use at typical concentrations. Low irritation and comedogenic potential, but may feel drying for some. Always patch test if you have sensitive skin.

Who should be careful with PEG-23 Methacrylate Copolymer?

Those with very dry or sensitive skin who find film-formers uncomfortable

Research sources

CosIng - European CommissionOpenPersonal Care Council - Safety AssessmentOpenPubMed - Methacrylate polymers in cosmeticsOpen

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.