Ingredient review
Perfluorooctylethyl/Diphenyl Dimethicone Copolymer
INCI: PERFLUOROOCTYLETHYL/DIPHENYL DIMETHICONE COPOLYMER
A high-performance film former that helps makeup and sunscreen stay put, but its environmental persistence raises concerns.
In plain English
This ingredient is a man-made polymer that combines silicone and fluorinated compounds. It forms a flexible, water-resistant film on skin or hair, helping products like foundation and sunscreen last longer without smudging or washing off easily. Think of it as a clear, breathable raincoat for your makeup.
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
Perfluorooctylethyl/Diphenyl Dimethicone 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 Perfluorooctylethyl/Diphenyl Dimethicone 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 created by linking perfluorooctylethyl groups with diphenyl dimethicone, giving it both silicone-like spreadability and fluoropolymer-like water and oil repellency.
How it works
When applied, the copolymer dries down into a thin, flexible film that adheres to the skin or hair. This film physically blocks water and oil from penetrating, which helps pigments and UV filters stay in place longer. It also improves the texture of products, making them feel smooth and silky.
Pros
Excellent water resistance
Helps makeup and sunscreen survive sweat, humidity, and swimming without breaking down.
Smooth, silky feel
Imparts a non-greasy, velvety texture that makes products easy to apply and comfortable to wear.
Cons and cautions
Environmental persistence
As a fluorinated compound, it may accumulate in the environment and is not readily biodegradable, raising ecological concerns.
Potential tightness on dry skin
The film-forming nature can feel drying or tight on already dehydrated or flaky skin.
Best for
- People who need long-wear makeup or water-resistant sunscreen
- Those with oily or combination skin who want to control shine and smudging
Use caution if
- Individuals with very dry or sensitive skin who may find film formers uncomfortable
Usage tips
Safety summary
Generally considered safe for topical use at typical concentrations. Low irritation and comedogenic risk. The main concern is environmental persistence rather than direct human toxicity.
Research notes
Limited peer-reviewed studies specifically on this copolymer, but related fluorosilicones show low acute toxicity and skin irritation. Environmental persistence is a known issue for fluorinated compounds.
Common label clues
- Typical concentration
- 1–10%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. However, some fluorinated compounds are under review for environmental impact.
- Common uses
- Long-wear foundations, Waterproof mascaras, Sunscreens, Lip products
- Environmental note
- Fluorinated silicones like this one are persistent in the environment. Some brands are moving toward more biodegradable alternatives.
Good to know
- This ingredient is often found in 'transfer-proof' or '24-hour wear' makeup formulas.
- It is not water-soluble, so standard cleansers may not remove it completely.
Common questions
What is Perfluorooctylethyl/Diphenyl Dimethicone Copolymer in beauty products?
This ingredient is a man-made polymer that combines silicone and fluorinated compounds. It forms a flexible, water-resistant film on skin or hair, helping products like foundation and sunscreen last longer without smudging or washing off easily. Think of it as a clear, breathable raincoat for your makeup.
What does Perfluorooctylethyl/Diphenyl Dimethicone Copolymer do in a beauty product?
When applied, the copolymer dries down into a thin, flexible film that adheres to the skin or hair. This film physically blocks water and oil from penetrating, which helps pigments and UV filters stay in place longer. It also improves the texture of products, making them feel smooth and silky.
Is Perfluorooctylethyl/Diphenyl Dimethicone Copolymer safe for most people?
Generally considered safe for topical use at typical concentrations. Low irritation and comedogenic risk. The main concern is environmental persistence rather than direct human toxicity.
Who should be careful with Perfluorooctylethyl/Diphenyl Dimethicone Copolymer?
Individuals with very dry or sensitive 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.