What Is Perfluorooctylethyl/Diphenyl Dimethicone Copolymer?
Perfluorooctylethyl/Diphenyl Dimethicone Copolymer is a lab-made silicone that blends two well-known technologies: siloxanes, which give that silky glide many cosmetics are loved for, and fluorocarbon chains, prized for their water- and oil-repelling talent. Chemically it is a copolymer where perfluorooctylethyl groups are grafted onto a diphenyl dimethicone backbone, resulting in a lightweight film former that sits smoothly on skin or hair while resisting sweat and sebum. Because both building blocks come from petroleum-derived feedstocks, the ingredient does not rely on animal or plant sources.
Formulators started experimenting with fluorinated silicones in the late 1990s when long-wear makeup became popular. Researchers found that adding fluorocarbon side chains to classic dimethicone improved durability without sacrificing the pleasant slip consumers expect. Modern production uses controlled hydrosilylation: reactive silicone chains are combined with a perfluorinated alkyl precursor under heat and a platinum catalyst, then purified to remove solvents and trace catalyst. The final product is a clear, low-viscosity fluid or sometimes a soft wax, supplied to brands ready to mix into oil phases or powders.
You will most often meet this copolymer in long-lasting foundations, primers, setting sprays, waterproof mascaras, liquid lipsticks, sunscreens, anti-aging creams, sheet masks, hair serums and even some cream blushes. Its popularity rests on the way it boosts wear time while giving a smooth feel that is never greasy or heavy.
Perfluorooctylethyl/Diphenyl Dimethicone Copolymer’s Cosmetic Benefits/Uses
This multitasking silicone is prized mainly for one role that makes a big difference in everyday formulas.
As an emollient it spreads effortlessly to fill in tiny gaps on the skin surface, leaving a soft, conditioned feel. The fluorinated side chains form a breathable barrier that locks in moisture yet resists water and oil, so makeup stays put longer and creams feel light instead of occlusive. The silky finish also helps reduce the look of fine lines and coarse texture, giving products a smoother, more luxurious touch.
Who Can Use Perfluorooctylethyl/Diphenyl Dimethicone Copolymer
This ingredient is considered gentle enough for most skin types. Dry and normal skin appreciate its moisture sealing ability while oily and combination skin like the weightless feel that does not add extra grease. Sensitive skin usually tolerates it because the molecule is large and sits on the surface rather than sinking in. The only group that might take caution is anyone with a known intolerance to silicones since they may notice buildup or a suffocating feeling.
Because the copolymer is fully synthetic and made from petroleum derived feedstocks it contains no animal material. That makes it suitable for vegans and vegetarians provided the finished product as a whole aligns with their ethics.
Current safety data shows no reason pregnant or breastfeeding women need to avoid topical use. It does not penetrate deeply or enter the bloodstream in any meaningful amount. Still this is not medical advice so anyone who is pregnant or nursing should run any product they plan to use past a qualified doctor just to be safe.
The ingredient does not cause photosensitivity and will not make skin more prone to sunburn. In fact its water repellency can help sunscreen last longer. There are no known interactions with common actives like vitamin C or retinol so it plays well in complex routines.
Potential Side Effects/Adverse Reactions
Responses to any cosmetic ingredient vary from person to person. The effects listed below are possible yet unlikely for the average user when the product is formulated correctly.
- Mild skin irritation such as redness or itching in very sensitive individuals
- Contact dermatitis in people already allergic to silicones or fluorinated compounds
- Temporary clogged pores or breakouts if layered with other heavy occlusives on acne prone skin
- Eye stinging or watering if the raw material gets directly into the eyes during application
- Build up on hair shafts leading to a weighed down feel if shampoos are not used to fully cleanse between uses
If any of these reactions occur stop using the product and consult a healthcare professional.
Comedogenic Rating
Rating: 1/5
This copolymer is a large, inert molecule that sits on the surface rather than sinking into pores. It forms a light, breathable film that does not readily mix with skin oils, making it unlikely to trap debris and trigger blemishes. Because it repels both water and sebum, most users find it non-pore-clogging unless layered with multiple heavy occlusives.
Suitable for acne-prone or breakout-prone skin in most cases, though those who feel any silicone leaves a residue may prefer to use it sparingly.
Worth noting: proper cleansing is still important, as long-wear formulas can linger if not fully removed and leftover product can contribute to congestion over time.
Summary
Perfluorooctylethyl/Diphenyl Dimethicone Copolymer acts mainly as a silky emollient and film former, smoothing rough texture, sealing in moisture and helping makeup or sunscreen stay put despite sweat or oil. Its hybrid silicone-fluorocarbon structure lets it glide on easily then set into an invisible, water-resistant veil that feels lighter than classic dimethicone.
The ingredient enjoys steady popularity in long-wear foundations, primers and waterproof mascaras but is still less common than standard silicones because fluorinated materials cost more to produce.
Overall safety data is strong: it is non-sensitising, non-phototoxic and does not penetrate deeply. Still, everyone’s skin is unique so it is smart to patch test any new product containing this copolymer before full application.