Ingredient review
Methacrylate Crosspolymer
INCI: METHYL METHACRYLATE/TRIMETHOXYSILYLPROPYL METHACRYLATE CROSSPOLYMER
A synthetic film-former that helps makeup and sunscreen last longer and feel smoother, with a low risk of irritation.
In plain English
This ingredient is a type of plastic-like polymer that forms a thin, flexible film on your skin. It is commonly used in long-wear makeup and sunscreens to help them stay put, resist water and sweat, and create a smooth, even finish. Think of it as a gentle, invisible shield that helps your products perform better without clogging pores or causing irritation.
Review score
Safety, usefulness, and evidence
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
Quick decision guide
Useful, but context matters
Methacrylate 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.
- Step 1Start with the score, then check the irritation and clogging risk before judging Methacrylate Crosspolymer.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic crosspolymer made from methyl methacrylate and trimethoxysilylpropyl methacrylate monomers. It is a fine powder that forms a film when applied to the skin.
How it works
When applied, the powder particles spread and link together to create a continuous, breathable film on the skin's surface. This film improves the adherence of pigments and active ingredients, enhances water resistance, and gives a soft-focus, blurring effect to the skin.
Pros
Boosts product longevity
Helps makeup and sunscreen stay in place for hours, reducing the need for touch-ups.
Smooth, silky texture
Creates a velvety feel on skin and can blur the appearance of fine lines and pores.
Cons and cautions
Synthetic origin
Made from petrochemical-derived monomers, which may not align with natural or clean beauty preferences.
Potential dryness
The film-forming effect can feel slightly tight or drying on very dry or compromised skin.
Best for
- People who want long-lasting makeup or sunscreen
- Those with oily or combination skin looking for a matte finish
Use caution if
- Individuals who prefer only natural or plant-based ingredients
- Those with extremely dry or dehydrated skin who may find film-formers uncomfortable
Usage tips
Safety summary
Methacrylate crosspolymers are well-studied and considered safe for topical use. They have a low irritation and comedogenic risk, making them suitable for most skin types.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that methacrylate crosspolymers are safe in cosmetic formulations at current usage levels.
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.
- Common uses
- Foundations, Sunscreens, Long-wear makeup, Eye shadows, Primers
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in very small amounts and is not considered a major environmental concern.
Good to know
- This ingredient is often used in combination with silicones for an even smoother application.
- It is considered safe and non-irritating by major cosmetic safety panels.
Common questions
What is Methacrylate Crosspolymer in beauty products?
This ingredient is a type of plastic-like polymer that forms a thin, flexible film on your skin. It is commonly used in long-wear makeup and sunscreens to help them stay put, resist water and sweat, and create a smooth, even finish. Think of it as a gentle, invisible shield that helps your products perform better without clogging pores or causing irritation.
What does Methacrylate Crosspolymer do in a beauty product?
When applied, the powder particles spread and link together to create a continuous, breathable film on the skin's surface. This film improves the adherence of pigments and active ingredients, enhances water resistance, and gives a soft-focus, blurring effect to the skin.
Is Methacrylate Crosspolymer safe for most people?
Methacrylate crosspolymers are well-studied and considered safe for topical use. They have a low irritation and comedogenic risk, making them suitable for most skin types.
Who should be careful with Methacrylate Crosspolymer?
Individuals who prefer only natural or plant-based ingredients Those with extremely dry or dehydrated skin who may find film-formers uncomfortable
Research sources
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.