Ingredient review
Fluorosilicone Film Former
INCI: TRIFLUOROPROPYL DIMETHICONE/VINYL TRIFLUOROPROPYL DIMETHICONE/SILSESQUIOXANE CROSSPOLYMER
A synthetic fluorosilicone polymer that forms a flexible, breathable film on skin for long-lasting, water-resistant wear without clogging pores.
In plain English
This ingredient is a special type of silicone that spreads into a thin, invisible film on your skin. It helps makeup stay put longer, resist water and sweat, and feel smooth and silky. Unlike some older film formers, it doesn't feel heavy or sticky, and it lets your skin breathe.
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
Fluorosilicone Film Former 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 Fluorosilicone Film Former.
- 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 crosslinked silicone polymer that contains fluorine atoms, making it highly resistant to water and oil. It is created by chemically linking trifluoropropyl dimethicone with a silsesquioxane structure, resulting in a flexible, durable film.
How it works
When applied, the polymer chains spread across the skin and link together (crosslink) to form a continuous, flexible film. This film physically blocks water and oil from disturbing the product underneath, while still allowing moisture vapor to escape (breathability). The fluorine component adds extra water and oil repellency.
Pros
Exceptional wear time
Creates a flexible film that keeps makeup and sunscreen in place for hours, even through sweat and humidity.
Lightweight feel
Unlike some film formers that feel heavy or sticky, this silicone polymer spreads into a thin, silky layer that is barely noticeable on skin.
Cons and cautions
Requires double cleansing
Because it is water-resistant, you may need an oil-based cleanser or micellar water to fully remove it, which can be an extra step in your routine.
Synthetic composition
As a fluorosilicone, it is not biodegradable and is made from non-renewable resources, which may be a concern for environmentally conscious consumers.
Best for
- Anyone wanting long-wear, waterproof makeup
- People with oily skin who need makeup to stay put
Use caution if
- Those who prefer only naturally-derived ingredients
Usage tips
Safety summary
Considered safe for cosmetic use at typical concentrations. Low irritation and comedogenic potential. No significant safety concerns reported in regulatory or dermatological literature.
Research notes
Research focuses on its film-forming and water-resistant properties. Studies show it improves wear time and water resistance in sunscreens and color cosmetics without increasing irritation. More long-term environmental data is needed.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics globally, including by the U.S. FDA and EU CosIng database. No known restrictions at typical use levels.
- Common uses
- Long-wear foundations, Waterproof eyeliners, Lipsticks, Sunscreens
- Environmental note
- Fluorosilicones are synthetic and not biodegradable. They may persist in the environment, though their impact is less studied than that of older fluorinated compounds.
Good to know
- This ingredient is often listed near the end of an ingredient list because it is used at low concentrations.
- It is considered non-comedogenic and safe for most skin types, including sensitive skin.
Common questions
What is Fluorosilicone Film Former in beauty products?
This ingredient is a special type of silicone that spreads into a thin, invisible film on your skin. It helps makeup stay put longer, resist water and sweat, and feel smooth and silky. Unlike some older film formers, it doesn't feel heavy or sticky, and it lets your skin breathe.
What does Fluorosilicone Film Former do in a beauty product?
When applied, the polymer chains spread across the skin and link together (crosslink) to form a continuous, flexible film. This film physically blocks water and oil from disturbing the product underneath, while still allowing moisture vapor to escape (breathability). The fluorine component adds extra water and oil repellency.
Is Fluorosilicone Film Former safe for most people?
Considered safe for cosmetic use at typical concentrations. Low irritation and comedogenic potential. No significant safety concerns reported in regulatory or dermatological literature.
Who should be careful with Fluorosilicone Film Former?
Those who prefer only naturally-derived 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.