Ingredient review

Methacrylic Acid Crosspolymer

INCI: METHACRYLIC ACID/PEG-6 METHACRYLATE/PEG-6 DIMETHACRYLATE CROSSPOLYMER

A synthetic polymer that helps create a smooth, silky feel on skin and improves product texture without known irritation.

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In plain English

This is a man-made ingredient that forms a thin, flexible film on your skin. It helps lotions and serums spread smoothly, feel silky, and stay stable. Think of it like a gentle, invisible net that holds the product together and gives it a pleasant texture. It is not absorbed into the skin and is considered very safe for most people.

Review score

Safety, usefulness, and evidence

4.0Good
4.0/ 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

Methacrylic Acid 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 Methacrylic Acid 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 methacrylic acid and polyethylene glycol (PEG) chains. It is a high-molecular-weight ingredient that does not penetrate the skin.

How it works

When applied, it forms a thin, breathable film on the skin's surface. This film helps other ingredients spread evenly, reduces tackiness, and can improve water resistance in sunscreens. It also thickens the product, giving it a luxurious, silky feel.

Pros

Silky texture

Creates a smooth, non-greasy feel that makes products pleasant to apply and wear.

Stability booster

Helps keep emulsions from separating, so your product stays consistent from first use to last.

Cons and cautions

Synthetic origin

Made from petrochemicals, which may not align with natural or 'clean' skincare preferences.

PEG concerns

PEG compounds can be contaminated with ethylene oxide during manufacturing, though cosmetic-grade versions are purified to safe levels.

Best for

  • Anyone who enjoys lightweight, silky-feeling skincare
  • People looking for a non-greasy texture in moisturizers or sunscreens

Use caution if

  • Those strictly avoiding all synthetic ingredients
  • Individuals with known sensitivity to PEG compounds (rare)

Usage tips

Look for this ingredient in lightweight serums or gel-creams for a silky finish.
It works well under makeup as a primer-like base.

Safety summary

Considered safe for topical use in cosmetics. Low irritation and comedogenic risk. The main concern is the potential for impurities in PEG components, but cosmetic-grade ingredients are purified to meet safety standards.

Research notes

Safety is supported by industry reviews and regulatory approvals. Specific studies on this exact crosspolymer are limited, but the class of methacrylate crosspolymers is well-established in cosmetics with a strong safety record.

Common label clues

Typical concentration
0.1% 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 similar methacrylate crosspolymers safe as used.
Common uses
Serums, Moisturizers, Sunscreens, Makeup Primers
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 often used in sunscreens to improve water resistance.
  • It is considered safe by major regulatory bodies when used in cosmetics.

Common questions

What is Methacrylic Acid Crosspolymer in beauty products?

This is a man-made ingredient that forms a thin, flexible film on your skin. It helps lotions and serums spread smoothly, feel silky, and stay stable. Think of it like a gentle, invisible net that holds the product together and gives it a pleasant texture. It is not absorbed into the skin and is considered very safe for most people.

What does Methacrylic Acid Crosspolymer do in a beauty product?

When applied, it forms a thin, breathable film on the skin's surface. This film helps other ingredients spread evenly, reduces tackiness, and can improve water resistance in sunscreens. It also thickens the product, giving it a luxurious, silky feel.

Is Methacrylic Acid Crosspolymer safe for most people?

Considered safe for topical use in cosmetics. Low irritation and comedogenic risk. The main concern is the potential for impurities in PEG components, but cosmetic-grade ingredients are purified to meet safety standards.

Who should be careful with Methacrylic Acid Crosspolymer?

Those strictly avoiding all synthetic ingredients Individuals with known sensitivity to PEG compounds (rare)

Research sources

Cosmetic Ingredient Review (CIR) - Safety Assessment of Methacrylate PolymersOpenEuropean Chemicals Agency (ECHA) - Methacrylic AcidOpenPubMed - Safety of PEGs 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.