Ingredient review
Ethylhexyl Ester of Tetradecene/Hexadecene/MA Copolymer
INCI: ETHYLHEXYL ESTER OF TETRADECENE/HEXADECENE/MA COPOLYMER
A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefit.
In plain English
This ingredient is a type of plastic-like polymer that spreads into a thin, flexible film on your skin. It's added to products like sunscreen and long-wear makeup to make them more water-resistant and help them last longer without smudging or rubbing off. Think of it as a clear, invisible shield that holds the product in place.
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
Ethylhexyl Ester of Tetradecene/Hexadecene/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 Ethylhexyl Ester of Tetradecene/Hexadecene/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 copolymer (a large molecule made from repeating units) that has been modified with an ethylhexyl ester group to make it more flexible and compatible with oils and other cosmetic ingredients.
How it works
When applied to the skin, the polymer chains link together as the solvent evaporates, forming a continuous, water-resistant film. This film physically locks in the other ingredients (like sunscreen filters or pigments) and prevents them from being easily washed or wiped away.
Pros
Boosts water resistance
Helps sunscreens and makeup stay effective even when you sweat or get wet, so you don't have to reapply as often.
Improves wear time
Creates a flexible film that keeps foundation, eyeliner, or lipstick in place for hours without smudging.
Cons and cautions
No active skincare benefit
This ingredient is purely functional—it doesn't hydrate, soothe, or treat the skin in any way.
May require double cleansing
Because it forms a water-resistant film, it can be stubborn to remove with just water or a gentle cleanser, often needing an oil-based makeup remover first.
Best for
- Anyone who wants their sunscreen or makeup to last longer, especially in humid or sweaty conditions
- People who wear long-wear or waterproof makeup
Use caution if
- Those with very sensitive or reactive skin who prefer minimal synthetic ingredients
Usage tips
Safety summary
Generally recognized as safe for topical cosmetic use. Low irritation and comedogenic risk. No known significant safety concerns at typical concentrations.
Research notes
Limited peer-reviewed studies specifically on this exact polymer, but the broader class of film-forming copolymers is well-studied and considered safe. The CIR has reviewed similar ingredients and found no significant toxicity or irritation.
Common label clues
- Typical concentration
- 1–10%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. The Cosmetic Ingredient Review (CIR) panel has reviewed similar film-forming polymers and found them safe at typical use levels.
- Common uses
- Sunscreens, Waterproof makeup, Long-wear foundations, Lip products
- Environmental note
- As a synthetic polymer, it is not biodegradable and may persist in the environment. However, it is used in very small amounts per product.
Good to know
- This ingredient is often listed near the end of an INCI list because it's used at low concentrations.
- It's considered safe and non-irritating by major regulatory bodies when used as directed.
Common questions
What is Ethylhexyl Ester of Tetradecene/Hexadecene/MA Copolymer in beauty products?
This ingredient is a type of plastic-like polymer that spreads into a thin, flexible film on your skin. It's added to products like sunscreen and long-wear makeup to make them more water-resistant and help them last longer without smudging or rubbing off. Think of it as a clear, invisible shield that holds the product in place.
What does Ethylhexyl Ester of Tetradecene/Hexadecene/MA Copolymer do in a beauty product?
When applied to the skin, the polymer chains link together as the solvent evaporates, forming a continuous, water-resistant film. This film physically locks in the other ingredients (like sunscreen filters or pigments) and prevents them from being easily washed or wiped away.
Is Ethylhexyl Ester of Tetradecene/Hexadecene/MA Copolymer safe for most people?
Generally recognized as safe for topical cosmetic use. Low irritation and comedogenic risk. No known significant safety concerns at typical concentrations.
Who should be careful with Ethylhexyl Ester of Tetradecene/Hexadecene/MA Copolymer?
Those with very sensitive or reactive skin who prefer minimal synthetic 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.