Rilastil Sun System Water Touch Fluid SPF 50+ Versus COSRX Ultra-Light Invisible Sunscreen SPF 50 PA++++
Updated on January 25, 2025
Overview
What they are
These products are both cruelty-free and fungal acne (malassezia) safe sunscreens. They have a total of 7 ingredients in common
Cool Features
They both contain hyaluronic acid, SPF and Vitamin E
Suited For
They're both likely to be good for dry skin, brightening skin, sensitive skin and scar healing
Free From
They both do not contain any harsh alcohols, common allergens, oils, parabens or sulfates
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
Rilastil Sun System Water Touch Fluid SPF 50+ 36 ingredients
COSRX Ultra-Light Invisible Sunscreen SPF 50 PA++++ 28 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
Rilastil Sun System Water Touch Fluid SPF 50+ 36 ingredients
COSRX Ultra-Light Invisible Sunscreen SPF 50 PA++++ 28 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Ingredients Side-by-side
Water
Skin ConditioningDibutyl Adipate
EmollientButylene Glycol
Humectant
Butyl Methoxydibenzoylmethane
UV Absorber
Ethylhexyl Salicylate
UV Absorber
Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine
Skin Conditioning
Silica
Abrasive
Ethylhexyl Triazone
UV Absorber
Polyester-7
Skin ConditioningGlycerin
Humectant
Neopentyl Glycol Diheptanoate
Emollient1,2-Hexanediol
Skin ConditioningCetyl Alcohol
Emollient
CI 77891
Cosmetic ColorantMicrocrystalline Cellulose
AbsorbentAllantoin
Skin Conditioning
Tocopheryl Acetate
Antioxidant
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingCellulose Gum
Emulsion StabilisingAluminum Hydroxide
EmollientSchisandra Chinensis Fruit Extract
Skin ConditioningSodium Hyaluronate
Humectant
Diglycerin
HumectantSodium Lauroyl Glutamate
Artemisia Umbelliformis Extract
Skin ConditioningBuddleja Davidii Leaf Extract
Skin ConditioningPeucedanum Ostruthium Leaf Extract
Skin ConditioningLysine
Skin ConditioningMagnesium Chloride
Pinus Pinaster Bark/Bud Extract
Antimicrobial
Sodium Hydroxide
BufferingTetrasodium Glutamate Diacetate
Hydroxyacetophenone
Antioxidant
Sodium Benzoate
Masking
Potassium Sorbate
Preservative
Parfum
Masking
Water, Dibutyl Adipate, Butylene Glycol, Butyl Methoxydibenzoylmethane, Ethylhexyl Salicylate, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Silica, Ethylhexyl Triazone, Polyester-7, Glycerin, Neopentyl Glycol Diheptanoate, 1,2-Hexanediol, Cetyl Alcohol, CI 77891, Microcrystalline Cellulose, Allantoin, Tocopheryl Acetate, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Cellulose Gum, Aluminum Hydroxide, Schisandra Chinensis Fruit Extract, Sodium Hyaluronate, Diglycerin, Sodium Lauroyl Glutamate, Artemisia Umbelliformis Extract, Buddleja Davidii Leaf Extract, Peucedanum Ostruthium Leaf Extract, Lysine, Magnesium Chloride, Pinus Pinaster Bark/Bud Extract, Sodium Hydroxide, Tetrasodium Glutamate Diacetate, Hydroxyacetophenone, Sodium Benzoate, Potassium Sorbate, Parfum
Aloe Barbadensis Leaf Water
MaskingDiethylhexyl Succinate
EmollientPropanediol
SolventWater
Skin ConditioningDrometrizole Trisiloxane
UV Absorber
Ethylhexyl Triazone
UV Absorber
Niacinamide
Smoothing
Diethylamino Hydroxybenzoyl Hexyl Benzoate
UV Filter
Terephthalylidene Dicamphor Sulfonic Acid
UV Absorber
1,2-Hexanediol
Skin ConditioningBehenyl Alcohol
Emollient
Methyl Trimethicone
Skin Conditioning
Sodium Polyacryloyldimethyl Taurate
Emulsion StabilisingHamamelis Virginiana Leaf Water
AstringentTromethamine
BufferingPolyacrylate Crosspolymer-6
Emulsion StabilisingArachidyl Alcohol
EmollientCaprylyl Glycol
EmollientEthylhexylglycerin
Skin ConditioningArachidyl Glucoside
EmulsifyingSodium Metaphosphate
BufferingAdenosine
Skin Conditioning
Tocopherol
Antioxidant
Sodium Hyaluronate
Humectant
Allantoin
Skin Conditioning
Citric Acid
Buffering
Sodium Benzoate
Masking
Potassium Sorbate
Preservative
Aloe Barbadensis Leaf Water, Diethylhexyl Succinate, Propanediol, Water, Drometrizole Trisiloxane, Ethylhexyl Triazone, Niacinamide, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Terephthalylidene Dicamphor Sulfonic Acid, 1,2-Hexanediol, Behenyl Alcohol, Methyl Trimethicone, Sodium Polyacryloyldimethyl Taurate, Hamamelis Virginiana Leaf Water, Tromethamine, Polyacrylate Crosspolymer-6, Arachidyl Alcohol, Caprylyl Glycol, Ethylhexylglycerin, Arachidyl Glucoside, Sodium Metaphosphate, Adenosine, Tocopherol, Sodium Hyaluronate, Allantoin, Citric Acid, Sodium Benzoate, Potassium Sorbate
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Water. 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. Stay hydrated!
Learn more about WaterEthylhexyl Triazone is a modern chemical sunscreen that protects from UV-B radiation.
It is the most effective of existing UV-B filters, as it provides the highest level of photo-stable absorption. It protects from the entire UV-B range (280 to 320nm), with it's highest level of protection at 314nm.
Ethylhexyl Triazone is oil soluble, oderless and colorless, which mean it is able to be incorporated into a variety of different formulations.
It is not currently available within the United States due to slow changing FDA regulations. Outside of the US, it is used in formulations at concentrations up to 5%.
Learn more about Ethylhexyl Triazone1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.
It is a:
- Humectant, drawing moisture into the skin
- Emollient, helping to soften skin
- Solvent, dispersing and stabilizing formulas
- Preservative booster, enhancing the antimicrobial activity of other preservatives
Allantoin plays a role in soothing and moisturizing the skin. Because of this, it is often added to products with strong active ingredients.
Some studies have shown this ingredient can promote wound healing with higher concentrations.
Allantoin is derived from the comfrey plant but produced synthetically for cosmetic products to ensure purity.
Learn more about AllantoinSodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.
Like hyaluronic acid, it is great at holding water and acts as a humectant. This makes it a great skin hydrating ingredient.
Sodium Hyaluronate is naturally occurring in our bodies and is mostly found in eye fluid and joints.
These are some other common types of Hyaluronic Acid:
Learn more about Sodium HyaluronateSodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.
Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.
Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.
It is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.
Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.
We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.
Learn more about Sodium BenzoatePotassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic and food products.
This ingredient comes from potassium salt derived from sorbic acid. Sorbic acid is a natural antibiotic and effective against fungus.
Both potassium sorbate and sorbic acid can be found in baked goods, cheeses, dried meats, dried fruit, ice cream, pickles, wine, yogurt, and more.
You'll often find this ingredient used with other preservatives.
Learn more about Potassium SorbateIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Rilastil Sun System Water Touch Fluid SPF 50+ 36 ingredients
COSRX Ultra-Light Invisible Sunscreen SPF 50 PA++++ 28 ingredients
Reviews
Here's what our community thinks
Rilastil Sun System Water Touch Fluid SPF 50+ 36 ingredients
COSRX Ultra-Light Invisible Sunscreen SPF 50 PA++++ 28 ingredients
Wow holy grail end game status achieved!
DO NOT REFORMULATE this, Cosrx, i swear!!!
Suuuper lightweight. Does exactly as named “light” & “invisible” which are two very important things for me as someone with oily acne prone skin in a humid climate.
Oh and did i mention it makes your makeup glide on top perfectly???!! Looove how this susncreen makes my foundation & concealer glide on so Show more
This sunscreen is so light and easy to spread, I love it! The ingredients look really good too, there's no alcohol, fragrance, or oil, and it doesn't have any ingredients that trigger fungal acne.
It also makes my skin look dewy and it lasts for a long time.
Edit - I've been using it for two months now and I've already bought two more bottles because this is definitely my favorite sunscreen. The Show more
