Ingredient review

Acrylates/PEG-4 Dimethacrylate Crosspolymer

INCI: ACRYLATES/PEG-4 DIMETHACRYLATE CROSSPOLYMER

A synthetic polymer that helps create a smooth, even film on skin, commonly used to improve texture and water resistance.

beautyskincarefilm-former

In plain English

This is a man-made ingredient that forms a thin, flexible film on your skin. It helps other ingredients spread evenly and stay put, and it can make products feel silky or gel-like. Think of it like a gentle, invisible shield that helps your skincare stay in place.

Quick decision guide

Useful, but context matters

Acrylates/PEG-4 Dimethacrylate Crosspolymer 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/PEG-4 Dimethacrylate Crosspolymer.
  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 crosspolymer made from acrylic acid derivatives and a PEG-modified dimethacrylate. It is a high-molecular-weight molecule that swells in water to create a gel-like consistency.

How it works

When mixed into a formula, it absorbs water and swells, thickening the product. Upon application, it dries to form a continuous, flexible film on the skin's surface. This film can help lock in other ingredients and improve the product's feel and wear.

Pros

Smooth texture

Creates a silky, non-sticky feel on skin, making products more pleasant to apply.

Water resistance

Helps sunscreens and makeup stay effective longer, even when you sweat or get wet.

Cons and cautions

Synthetic origin

Made from petrochemicals, which may be a concern for those seeking natural or eco-friendly options.

Potential tightness

In high concentrations, the film it forms can feel slightly tight or dry on very sensitive skin.

Best for

  • Anyone looking for a smooth, silky texture in serums or gels
  • People who want water-resistant sunscreens or long-wear makeup

Use caution if

  • Those with a strong preference for 100% natural ingredients

Usage tips

Apply to damp skin for easier spreading and a more even film.
Layer with a moisturizer if you have dry skin to avoid any tight feeling.

Safety summary

Generally recognized as safe for topical use in cosmetics at typical concentrations. Low risk of irritation or clogging pores. Not known to be toxic or sensitizing.

Research notes

Safety data is based on the broader class of acrylate crosspolymers, which have been reviewed by the CIR panel. Individual studies on this specific polymer are limited, but its chemical relatives show low irritation and sensitization potential.

Common label clues

Typical concentration
0.1% to 2%
Regulatory status
Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has evaluated similar acrylate crosspolymers and found them safe as used.
Common uses
Serums, Gels, Masks, Sunscreens
Environmental note
As a synthetic polymer, it is not biodegradable. However, it is used in very small amounts and is not known to accumulate in the environment.

Good to know

  • This ingredient is often used in combination with other polymers to fine-tune texture.
  • It is considered safe for use in cosmetics by major regulatory bodies.

Common questions

What is Acrylates/PEG-4 Dimethacrylate Crosspolymer in beauty products?

This is a man-made ingredient that forms a thin, flexible film on your skin. It helps other ingredients spread evenly and stay put, and it can make products feel silky or gel-like. Think of it like a gentle, invisible shield that helps your skincare stay in place.

What does Acrylates/PEG-4 Dimethacrylate Crosspolymer do in a beauty product?

When mixed into a formula, it absorbs water and swells, thickening the product. Upon application, it dries to form a continuous, flexible film on the skin's surface. This film can help lock in other ingredients and improve the product's feel and wear.

Is Acrylates/PEG-4 Dimethacrylate Crosspolymer safe for most people?

Generally recognized as safe for topical use in cosmetics at typical concentrations. Low risk of irritation or clogging pores. Not known to be toxic or sensitizing.

Who should be careful with Acrylates/PEG-4 Dimethacrylate Crosspolymer?

Those with a strong preference for 100% natural ingredients

Research sources

Cosmetic Ingredient Review (CIR) - Acrylates Crosspolymer SafetyOpenPubChem - Acrylates/PEG-4 Dimethacrylate CrosspolymerOpen

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.