Ingredient review
Ethylene/Ethylidene Norbornene/Propylene Copolymer
INCI: ETHYLENE/ETHYLIDENE NORBORNENE/PROPYLENE COPOLYMER
A synthetic polymer that helps create flexible, water-resistant films in makeup and skincare, generally considered safe and non-irritating.
In plain English
This is a man-made plastic-like ingredient that forms a thin, flexible film on your skin or lashes. It's used to help makeup last longer, resist water, and stay put without feeling stiff or brittle. Think of it as a gentle, invisible shield that helps your products perform better.
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/Ethylidene Norbornene/Propylene 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/Ethylidene Norbornene/Propylene 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 copolymer made from ethylene, ethylidene norbornene, and propylene monomers. It is a rubbery, flexible polymer designed to create a continuous film on the skin or hair.
How it works
When applied, the polymer chains spread out and then dry to form a thin, flexible, and water-resistant film. This film helps other ingredients (like pigments in mascara or sunscreen actives) stay in place, resist smudging, and improve wear time.
Pros
Flexible film
Unlike some stiff polymers, this copolymer creates a flexible film that moves with your skin or lashes, reducing cracking or flaking throughout the day.
Water-resistant wear
It significantly improves water and smudge resistance in mascaras and eyeliners, helping your makeup survive tears, sweat, or rain.
Cons and cautions
Synthetic origin
As a petroleum-derived polymer, it may not appeal to consumers seeking natural or eco-friendly ingredients.
Removal difficulty
Products containing this polymer often require an oil-based or dual-phase makeup remover to fully dissolve, which can be inconvenient.
Best for
- Anyone wanting long-wearing, water-resistant eye makeup
- People with oily skin who need smudge-proof products
Use caution if
- Those who prefer 100% natural or plant-based ingredients
Usage tips
Safety summary
The Cosmetic Ingredient Review (CIR) panel has evaluated similar film-forming polymers and found them safe for use in cosmetics at typical concentrations. There are no known significant irritation or sensitization risks. However, long-term environmental concerns exist due to its plastic nature.
Research notes
Research on this specific copolymer is limited, but studies on related film-forming polymers confirm low skin irritation and good safety profiles. Most evidence comes from manufacturer safety data and regulatory reviews rather than independent clinical trials.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US (FDA), EU (CosIng), and many other regions. No known restrictions at typical use levels.
- Common uses
- Mascara, Eyeliners, Lip products, Water-resistant sunscreens, Long-wear foundations
- Environmental note
- As a synthetic polymer, it is not biodegradable and may contribute to microplastic pollution if washed down drains. Some brands are exploring biodegradable alternatives.
Good to know
- This ingredient is commonly found in 'tubing' mascaras that form tiny tubes around each lash for easy removal.
- It is not water-soluble, so it won't dissolve in tears or sweat, but it can be removed with gentle oil-based cleansers.
Common questions
What is Ethylene/Ethylidene Norbornene/Propylene Copolymer in beauty products?
This is a man-made plastic-like ingredient that forms a thin, flexible film on your skin or lashes. It's used to help makeup last longer, resist water, and stay put without feeling stiff or brittle. Think of it as a gentle, invisible shield that helps your products perform better.
What does Ethylene/Ethylidene Norbornene/Propylene Copolymer do in a beauty product?
When applied, the polymer chains spread out and then dry to form a thin, flexible, and water-resistant film. This film helps other ingredients (like pigments in mascara or sunscreen actives) stay in place, resist smudging, and improve wear time.
Is Ethylene/Ethylidene Norbornene/Propylene Copolymer safe for most people?
The Cosmetic Ingredient Review (CIR) panel has evaluated similar film-forming polymers and found them safe for use in cosmetics at typical concentrations. There are no known significant irritation or sensitization risks. However, long-term environmental concerns exist due to its plastic nature.
Who should be careful with Ethylene/Ethylidene Norbornene/Propylene Copolymer?
Those who prefer 100% natural or plant-based ingredients
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.