Ingredient review
Ethylene/MA Copolymer
INCI: ETHYLENE/MA COPOLYMER
A synthetic film-former that helps products spread smoothly and resist water, but offers no direct skin benefit.
In plain English
Ethylene/MA Copolymer is a plastic-like ingredient that forms a thin, flexible film on your skin. It's often used in peel-off masks to create that satisfying peel, or in sunscreens and makeup to help the product stay put and feel less greasy. Think of it as a helper that improves how a product feels and lasts, but it doesn't actively moisturize or treat your skin.
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
Ethylene/MA 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.
- Step 1Start with the score, then check the irritation and clogging risk before judging Ethylene/MA Copolymer.
- 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 polymer made from ethylene and maleic anhydride monomers, processed into a water-soluble or dispersible powder that forms a film when applied to skin.
How it works
When applied, the copolymer molecules link together as the water evaporates, creating a continuous, flexible film on the skin's surface. This film can help other ingredients adhere better, improve water resistance, and give a smooth, non-tacky feel.
Pros
Improves product feel
Helps creams and lotions spread smoothly without a greasy after-feel, making the product more pleasant to use.
Boosts water resistance
In sunscreens and makeup, it helps the product stay effective longer when you sweat or get wet.
Cons and cautions
No direct skin benefit
It doesn't moisturize, soothe, or treat skin conditions—it's purely a texture and performance enhancer.
Can feel drying or tight
In peel-off masks or high-concentration formulas, the film can pull at skin and leave a tight, dry sensation.
Best for
- Anyone who enjoys peel-off masks for their sensory experience
- People looking for long-wearing makeup or water-resistant sunscreen
Use caution if
- Those with very dry or sensitive skin who may find film-formers tightening or irritating
- Anyone seeking purely natural or plant-based skincare
Usage tips
Safety summary
Ethylene/MA Copolymer is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, but may cause dryness or tightness in high amounts, especially in peel-off masks.
Research notes
The Cosmetic Ingredient Review (CIR) panel reviewed this ingredient and concluded it is safe for cosmetic use. No significant human or animal toxicity data raises concerns at current usage levels.
Common label clues
- Typical concentration
- 1–10% in rinse-off or leave-on formulas
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The CIR panel has deemed it safe at concentrations up to 10% in leave-on products.
- Common uses
- Masks, Peel-off masks, Sunscreens, Makeup
- Environmental note
- While it is biodegradable, it is derived from petrochemicals, so it is not a renewable or plant-based ingredient.
Good to know
- Ethylene/MA Copolymer is considered safe by the Cosmetic Ingredient Review (CIR) panel at typical use levels.
- It is biodegradable in the environment, but as a synthetic polymer, it is not from renewable sources.
Common questions
What is Ethylene/MA Copolymer in beauty products?
Ethylene/MA Copolymer is a plastic-like ingredient that forms a thin, flexible film on your skin. It's often used in peel-off masks to create that satisfying peel, or in sunscreens and makeup to help the product stay put and feel less greasy. Think of it as a helper that improves how a product feels and lasts, but it doesn't actively moisturize or treat your skin.
What does Ethylene/MA Copolymer do in a beauty product?
When applied, the copolymer molecules link together as the water evaporates, creating a continuous, flexible film on the skin's surface. This film can help other ingredients adhere better, improve water resistance, and give a smooth, non-tacky feel.
Is Ethylene/MA Copolymer safe for most people?
Ethylene/MA Copolymer is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, but may cause dryness or tightness in high amounts, especially in peel-off masks.
Who should be careful with Ethylene/MA Copolymer?
Those with very dry or sensitive skin who may find film-formers tightening or irritating Anyone seeking purely natural or plant-based skincare
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.