Ingredient review
Fluorinated Film-Forming Polymer
INCI: DIETHYLAMINOETHYL METHACRYLATE/HEMA/PERFLUOROHEXYLETHYL METHACRYLATE CROSSPOLYMER
A synthetic film-former that helps products resist water and wear longer, but its perfluoro structure raises environmental persistence concerns.
In plain English
This is a man-made polymer that creates a thin, flexible, water-resistant film on your skin or hair. Think of it like a clear, breathable raincoat for your makeup or sunscreen — it helps the product stay put even when you sweat or get wet. The 'perfluoro' part means it contains fluorine atoms, which give it strong water and oil repellency, similar to non-stick coatings. However, these types of compounds are very stable in the environment and can accumulate over time, which is a concern for some consumers.
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
Fluorinated Film-Forming Polymer 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 Fluorinated Film-Forming Polymer.
- 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 crosslinked polymer made from three monomers: diethylaminoethyl methacrylate, hydroxyethyl methacrylate (HEMA), and perfluorohexylethyl methacrylate. The crosslinking makes it a large, stable molecule that forms a continuous film when applied.
How it works
When applied, the polymer's solvent evaporates, leaving behind a thin, flexible film that adheres to the skin or hair. The perfluoro segments repel both water and oil, creating a barrier that prevents the product from washing off or smudging. The amino groups can also help the film stick to negatively charged surfaces like skin and hair.
Pros
Excellent water resistance
Creates a durable barrier that keeps sunscreen and makeup intact during swimming, sweating, or humid conditions, so you don't have to reapply as often.
Flexible, comfortable feel
Unlike some older film-formers, this polymer forms a flexible film that moves with your skin, reducing the tight or stiff feeling often associated with waterproof products.
Cons and cautions
Environmental persistence
Perfluoro compounds are extremely stable and do not break down easily in nature, leading to concerns about long-term accumulation in ecosystems and potential health effects.
Difficult to remove
The strong water and oil repellency means you may need a double cleanse with an oil-based cleanser to fully remove products containing this polymer, which can be inconvenient.
Best for
- People who need long-lasting, water-resistant sunscreen or makeup
- Those with oily skin who want products that stay put
Use caution if
- Consumers concerned about environmental persistence of perfluoro compounds
- Those who prefer fully biodegradable or natural ingredients
Usage tips
Safety summary
Generally considered safe for topical use at typical concentrations based on current data. However, the environmental persistence and potential for bioaccumulation of perfluoro compounds are ongoing concerns. Regulatory agencies are actively reviewing this class of ingredients.
Research notes
Limited peer-reviewed studies specifically on this polymer, but the broader PFAS class has been studied for environmental persistence and potential health effects. Cosmetic use is considered low-risk for acute toxicity, but long-term accumulation data is lacking.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in most countries, including the US and EU, but perfluoro compounds are being reviewed by regulators due to environmental persistence concerns. Always check local regulations.
- Common uses
- Sunscreens, Long-wear makeup, Waterproof mascara, Hair styling products
- Environmental note
- This ingredient is a perfluoroalkyl substance (PFAS), which is highly persistent in the environment and can bioaccumulate. Some manufacturers are moving away from PFAS ingredients due to these concerns.
Good to know
- This polymer is often used in combination with other film-formers to balance water resistance and removability.
- The 'perfluoro' prefix indicates it belongs to the PFAS family of chemicals, which are under increasing regulatory scrutiny.
Common questions
What is Fluorinated Film-Forming Polymer in beauty products?
This is a man-made polymer that creates a thin, flexible, water-resistant film on your skin or hair. Think of it like a clear, breathable raincoat for your makeup or sunscreen — it helps the product stay put even when you sweat or get wet. The 'perfluoro' part means it contains fluorine atoms, which give it strong water and oil repellency, similar to non-stick coatings. However, these types of compounds are very stable in the environment and can accumulate over time, which is a concern for some consumers.
What does Fluorinated Film-Forming Polymer do in a beauty product?
When applied, the polymer's solvent evaporates, leaving behind a thin, flexible film that adheres to the skin or hair. The perfluoro segments repel both water and oil, creating a barrier that prevents the product from washing off or smudging. The amino groups can also help the film stick to negatively charged surfaces like skin and hair.
Is Fluorinated Film-Forming Polymer safe for most people?
Generally considered safe for topical use at typical concentrations based on current data. However, the environmental persistence and potential for bioaccumulation of perfluoro compounds are ongoing concerns. Regulatory agencies are actively reviewing this class of ingredients.
Who should be careful with Fluorinated Film-Forming Polymer?
Consumers concerned about environmental persistence of perfluoro compounds Those who prefer fully biodegradable or natural 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.