SkinCeuticals Physical Fusion UV Defense SPF 50 Versus Kiehl's Super Fluid Daily UV Defense Sunscreen SPF 50+
What's inside
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Titanium Dioxide
Cosmetic Colorant
Zinc Oxide
Cosmetic Colorant
Water
Skin ConditioningDimethicone
Emollient
Isododecane
EmollientC12-15 Alkyl Benzoate
AntimicrobialUndecane
EmollientTriethylhexanoin
MaskingIsohexadecane
EmollientNylon-12
Caprylyl Methicone
Skin Conditioning
Butyloctyl Salicylate
Skin Conditioning
Phenethyl Benzoate
Emollient
Styrene/Acrylates Copolymer
Silica
Abrasive
Tridecane
Perfuming
Dicaprylyl Carbonate
EmollientDicaprylyl Ether
Emollient
Talc
Abrasive
Dimethicone/PEG-10/15 Crosspolymer
Aluminum Stearate
Cosmetic ColorantPentylene Glycol
Skin Conditioning
PEG-9 Polydimethylsiloxyethyl Dimethicone
Emulsifying
Alumina
Abrasive
Polyhydroxystearic Acid
Emulsifying
Phenoxyethanol
Preservative
Magnesium Sulfate
Caprylyl Glycol
Emollient
Iron Oxides
PEG-8 Laurate
Emulsifying
Disteardimonium Hectorite
StabilisingTriethoxycaprylylsilane
Tocopherol
Antioxidant
Propylene Carbonate
SolventArtemia Extract
Skin ConditioningBenzoic Acid
Masking
C9-15 Fluoroalcohol Phosphate
Skin ConditioningPEG-9
HumectantTitanium Dioxide, Zinc Oxide, Water, Dimethicone, Isododecane, C12-15 Alkyl Benzoate, Undecane, Triethylhexanoin, Isohexadecane, Nylon-12, Caprylyl Methicone, Butyloctyl Salicylate, Phenethyl Benzoate, Styrene/Acrylates Copolymer, Silica, Tridecane, Dicaprylyl Carbonate, Dicaprylyl Ether, Talc, Dimethicone/PEG-10/15 Crosspolymer, Aluminum Stearate, Pentylene Glycol, PEG-9 Polydimethylsiloxyethyl Dimethicone, Alumina, Polyhydroxystearic Acid, Phenoxyethanol, Magnesium Sulfate, Caprylyl Glycol, Iron Oxides, PEG-8 Laurate, Disteardimonium Hectorite, Triethoxycaprylylsilane, Tocopherol, Propylene Carbonate, Artemia Extract, Benzoic Acid, C9-15 Fluoroalcohol Phosphate, PEG-9
Butyl Methoxydibenzoylmethane 3%
UV Absorber
Homosalate 15%
Skin Conditioning
Ethylhexyl Salicylate 5%
UV Absorber
Octocrylene 10%
UV Absorber
Water
Skin ConditioningDimethicone
Emollient
Alcohol Denat.
Antimicrobial
Silica
Abrasive
Styrene/Acrylates Copolymer
Butyloctyl Salicylate
Skin Conditioning
PEG-30 Dipolyhydroxystearate
Emulsifying
Polymethylsilsesquioxane
Tocopherol
Antioxidant
Phenoxyethanol
Preservative
PEG-8 Laurate
Emulsifying
Lauryl PEG/PPG-18/18 Methicone
Skin Conditioning
Sodium Chloride
MaskingCaprylyl Glycol
Emollient
Isostearyl Alcohol
Emollient
Poly C10-30 Alkyl Acrylate
Emulsion StabilisingP-Anisic Acid
Masking
Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
Antioxidant
Trisodium Ethylenediamine Disuccinate
Sodium Dodecylbenzenesulfonate
CleansingButyl Methoxydibenzoylmethane 3%, Homosalate 15%, Ethylhexyl Salicylate 5%, Octocrylene 10%, Water, Dimethicone, Alcohol Denat., Silica, Styrene/Acrylates Copolymer, Butyloctyl Salicylate, PEG-30 Dipolyhydroxystearate, Polymethylsilsesquioxane, Tocopherol, Phenoxyethanol, PEG-8 Laurate, Lauryl PEG/PPG-18/18 Methicone, Sodium Chloride, Caprylyl Glycol, Isostearyl Alcohol, Poly C10-30 Alkyl Acrylate, P-Anisic Acid, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Trisodium Ethylenediamine Disuccinate, Sodium Dodecylbenzenesulfonate
Reviews
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Butyloctyl Salicylate is a chemical UV filter structurally similar to octisalate. It is a photostabilizer, SPF booster, emollient and solvent. This ingredient helps evenly spread out ingredients.
According to a manufacturer, it is suitable for pairing with micro Titanium Dioxide, Zinc Oxide, and pigments.
Photostabilizers help stabilize UV-filters and prevents them from degrading quickly.
Learn more about Butyloctyl SalicylateCaprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created.
Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin.
Because it is not a free-fatty acid or alcohol, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on).
Learn more about Caprylyl GlycolDimethicone is a type of synthetic silicone created from natural materials such as quartz. It is also known as polydimethylsiloxane.
What it does:
Dimethicone comes in different viscosities:
Depending on the viscosity, dimethicone has different properties.
Ingredients lists don't always show which type is used, so we recommend reaching out to the brand if you have questions about the viscosity.
This ingredient is unlikely to cause irritation because it does not get absorbed into skin. However, people with silicone allergies should be careful about using this ingredient.
Note: Dimethicone may contribute to pilling. This is because it is not oil or water soluble, so pilling may occur when layered with products. When mixed with heavy oils in a formula, the outcome is also quite greasy.
Learn more about DimethiconePEG-8 Laurate isn't fungal acne safe.
Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.
It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.
Silica, also known as silicon dioxide, is a naturally occurring mineral. It is used as a fine, spherical, and porous powder in cosmetics.
Though it has exfoliant properties, the function of silica varies depending on the product.
The unique structure of silica enhances the spreadability and adds smoothness, making it a great texture enhancer.
It is also used as an active carrier, emulsifier, and mattifier due to its ability to absorb excess oil.
In some products, tiny microneedles called spicules are made from silica or hydrolyzed sponge. When you rub them in, they lightly polish away dead skin layers and enhance the penetration of active ingredients.
Learn more about SilicaThis ingredient is a synthetic polymer that mainly works as a film former. It creates a thin, flexible film on the surface of your skin. Once applied, it helps improves wear, durability, and resistance to water/smudging.
Due to its large molecule size, it sits on top of your skin rather than absorbing into it.
Tocopherol is a fat-soluble antioxidant known as Vitamin E.
You'll find this ingredient in the vast majority of skincare (for good reason). It works to neutralize free radicals, or unstable molecules generated by UV exposure, pollution, and other environmental stressors, before they can cause oxidative damage to your skin cells.
Topically applied tocopherol has been shown to protect against UV damage by ramping up the skin's own natural defense enzymes.
It also acts as a skin conditioning agent; some studies show that regular topical use can improve the skin's water-binding capacity over 2-4 weeks.
This ingredient is especially loved for being a team player. When combined with Vitamin C, the photoprotective effect of both ingredients roughly doubles and the combo also helps reduce UV-induced DNA damage.
This ingredient has some brightening potential but it's more of a prevention ingredient than spot-fader. Cell studies show it can slow down melanin production but it's worth noting that it's not the most powerful brightener out there.
In formulations, it also serves as a stabilizer that helps protect other oxidation-prone ingredients from degrading.
Concentrations usually range from 0.1-1% in most leave-on products.
Learn more about TocopherolWater. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!
Learn more about Water
