Ingredient review

Butyl Acrylate/Glycol Dimethacrylate Crosspolymer

INCI: BUTYL ACRYLATE/GLYCOL DIMETHACRYLATE CROSSPOLYMER

A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefit.

beautyskincarefilm-former

In plain English

This is a plastic-like ingredient that creates a thin, flexible film on your skin or hair. It helps makeup last longer, makes sunscreens more water-resistant, and gives lotions a smooth, silky feel. Think of it as a clear, invisible shield that holds everything 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

Butyl Acrylate/Glycol 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 Butyl Acrylate/Glycol 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 polymer made from acrylic and methacrylic acid derivatives, crosslinked into a network that forms a flexible film when applied to skin.

How it works

When the product dries, the polymer molecules link together into a continuous film that sits on the skin's surface. This film physically blocks water and sweat, helps pigments stay put, and gives a smooth, non-tacky finish.

Pros

Boosts wear time

Creates a flexible film that helps makeup and sunscreen stay on longer, even in heat or humidity.

Improves texture

Gives a smooth, silky feel to products without adding greasiness, making it ideal for lightweight formulas.

Cons and cautions

No skincare benefit

This ingredient is purely functional—it doesn't hydrate, soothe, or repair the skin.

Can be drying

The film may feel tight or uncomfortable on already dry or sensitive skin, especially if used in high concentrations.

Best for

  • Anyone wanting long-wearing makeup or water-resistant sunscreen
  • People with oily skin who prefer a matte, non-greasy finish

Use caution if

  • Those with very dry or compromised skin barriers who may find film-formers too occlusive

Usage tips

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

Safety summary

Considered safe for topical use at typical concentrations. Low irritation and comedogenic risk, but may cause tightness in very dry skin. No known serious safety concerns.

Research notes

Limited independent research on this specific polymer, but the broader class of acrylate crosspolymers has a long history of safe use in cosmetics. Safety assessments rely on its large molecular size, which prevents skin penetration.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics globally, including by the U.S. FDA and EU CosIng database, with no known restrictions at typical use levels.
Common uses
Sunscreens, Long-wear foundations, Waterproof mascaras, Lip products
Environmental note
As a synthetic polymer, it is not biodegradable and may contribute to microplastic pollution. Some brands are moving toward biodegradable alternatives.

Good to know

  • This polymer is commonly used in 'waterproof' and 'long-wear' formulas.
  • It is not absorbed into the skin—it sits on the surface and is removed with cleansing.

Common questions

What is Butyl Acrylate/Glycol Dimethacrylate Crosspolymer in beauty products?

This is a plastic-like ingredient that creates a thin, flexible film on your skin or hair. It helps makeup last longer, makes sunscreens more water-resistant, and gives lotions a smooth, silky feel. Think of it as a clear, invisible shield that holds everything in place.

What does Butyl Acrylate/Glycol Dimethacrylate Crosspolymer do in a beauty product?

When the product dries, the polymer molecules link together into a continuous film that sits on the skin's surface. This film physically blocks water and sweat, helps pigments stay put, and gives a smooth, non-tacky finish.

Is Butyl Acrylate/Glycol Dimethacrylate Crosspolymer safe for most people?

Considered safe for topical use at typical concentrations. Low irritation and comedogenic risk, but may cause tightness in very dry skin. No known serious safety concerns.

Who should be careful with Butyl Acrylate/Glycol Dimethacrylate Crosspolymer?

Those with very dry or compromised skin barriers who may find film-formers too occlusive

Research sources

CosIng - EU Cosmetic Ingredient DatabaseOpenPersonal Care Council - Safety Assessment of Acrylate PolymersOpenPubMed - Safety of Acrylate Copolymers 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.