Biodermal Ultra Light Sun Fluid SPF50+ Versus ISDIN Fusion Water Magic SPF 50
Updated on May 26, 2025
Overview
What they are
These products are both sunscreens. They have a total of 14 ingredients in common
Cool Features
They both contain exfoliants, hyaluronic acid, SPF and Vitamin E
Suited For
They're both likely to be good for dry skin
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
Biodermal Ultra Light Sun Fluid SPF50+ 26 ingredients
ISDIN Fusion Water Magic SPF 50 30 ingredients
What's inside
What's inside
At a glance
Click on any of the items below to learn more
Biodermal Ultra Light Sun Fluid SPF50+ 26 ingredients
ISDIN Fusion Water Magic SPF 50 30 ingredients
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningDiisopropyl Sebacate
EmollientDibutyl Adipate
EmollientDiethylamino Hydroxybenzoyl Hexyl Benzoate
UV Filter
Tris-Biphenyl Triazine
UV Absorber
Ethylhexyl Salicylate
UV Absorber
Propanediol
Solvent
Silica
Abrasive
Ethylhexyl Triazone
UV Absorber
Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine
Skin Conditioning
1,2-Hexanediol
Skin Conditioning
Tocopheryl Acetate
Antioxidant
Potassium Cetyl Phosphate
EmulsifyingCetyl Alcohol
Emollient
Bis-Ethylhexyl Hydroxydimethoxy Benzylmalonate
Antioxidant
Sarcosine
Skin ConditioningSodium Hyaluronate
Humectant
Decyl Glucoside
CleansingVp/Eicosene Copolymer
Butylene Glycol
Humectant
Pentylene Glycol
Skin ConditioningXanthan Gum
EmulsifyingCarbomer
Emulsion StabilisingCitric Acid
Buffering
Disodium Phosphate
BufferingSodium Benzoate
Masking
Water, Diisopropyl Sebacate, Dibutyl Adipate, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Tris-Biphenyl Triazine, Ethylhexyl Salicylate, Propanediol, Silica, Ethylhexyl Triazone, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, 1,2-Hexanediol, Tocopheryl Acetate, Potassium Cetyl Phosphate, Cetyl Alcohol, Bis-Ethylhexyl Hydroxydimethoxy Benzylmalonate, Sarcosine, Sodium Hyaluronate, Decyl Glucoside, Vp/Eicosene Copolymer, Butylene Glycol, Pentylene Glycol, Xanthan Gum, Carbomer, Citric Acid, Disodium Phosphate, Sodium Benzoate
Water
Skin ConditioningDibutyl Adipate
EmollientPropanediol
Solvent
Ethylhexyl Salicylate
UV Absorber
Ethylhexyl Triazone
UV Absorber
Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine
Skin Conditioning
Dimethicone
Emollient
Butyl Methoxydibenzoylmethane
UV Absorber
Phenylbenzimidazole Sulfonic Acid
UV Absorber
Silica
Abrasive
Diisopropyl Sebacate
EmollientArginine
Masking
Pentylene Glycol
Skin ConditioningHydroxyacetophenone
Antioxidant
Lauryl PEG/PPG-18/18 Methicone
Skin Conditioning
Vp/Eicosene Copolymer
Polysorbate 60
Emulsifying
Dimethicone/Vinyl Dimethicone Crosspolymer
Skin Conditioning
Glycerin
Humectant
Caprylyl Glycol
Emollient
Hydrated Silica
Abrasive
Tocopheryl Acetate
Antioxidant
PEG-10 Dimethicone
Skin Conditioning
Tetrasodium Glutamate Diacetate
Parfum
Masking
Sclerotium Gum
Emulsion StabilisingSodium Hyaluronate
Humectant
Porphyridium Cruentum Extract
Skin ConditioningXanthan Gum
EmulsifyingCitric Acid
Buffering
Water, Dibutyl Adipate, Propanediol, Ethylhexyl Salicylate, Ethylhexyl Triazone, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Dimethicone, Butyl Methoxydibenzoylmethane, Phenylbenzimidazole Sulfonic Acid, Silica, Diisopropyl Sebacate, Arginine, Pentylene Glycol, Hydroxyacetophenone, Lauryl PEG/PPG-18/18 Methicone, Vp/Eicosene Copolymer, Polysorbate 60, Dimethicone/Vinyl Dimethicone Crosspolymer, Glycerin, Caprylyl Glycol, Hydrated Silica, Tocopheryl Acetate, PEG-10 Dimethicone, Tetrasodium Glutamate Diacetate, Parfum, Sclerotium Gum, Sodium Hyaluronate, Porphyridium Cruentum Extract, Xanthan Gum, Citric Acid
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
You might know this ingredient as Tinosorb S or Bemotrizinol. It is a UV filter that covers both UVA and UVB rays.
This ingredient has two peak UV absorption peaks ( 310 and 340 nm) and is able to absorb both UV-A and UV-B rays. This ingredient works by preventing UV rays from reaching and damaging your skin.
On top of that - it is highly photostable and helps prevent the photodegration of other sunscreen ingredients such as avobenzone.
Tinosorb S is allowed in the EU, Australia, and Asia. It is close to being approved by the FDA and we'll hopefully get this ingredient in the U.S. by late 2025.
Fun fact: Tinosorb S is the most effective UV absorber at maximum concentration (measured by SPF) permitted in the EU.
This ingredient is oil-soluble, so your oil-cleansers will take this right off at night.
Learn more about Bis-Ethylhexyloxyphenol Methoxyphenyl TriazineCitric Acid is an alpha hydroxy acid (AHA) naturally found in citrus fruits like oranges, lemons, and limes.
Like other AHAs, citric acid can exfoliate skin by breaking down the bonds that hold dead skin cells together. This helps reveal smoother and brighter skin underneath.
However, this exfoliating effect only happens at high concentrations (20%) which can be hard to find in cosmetic products.
Due to this, citric acid is usually included in small amounts as a pH adjuster. This helps keep products slightly more acidic and compatible with skin's natural pH.
In skincare formulas, citric acid can:
While it can provide some skin benefits, research shows lactic acid and glycolic acid are generally more effective and less irritating exfoliants.
Most citric acid used in skincare today is made by fermenting sugars (usually from molasses). This synthetic version is identical to the natural citrus form but easier to stabilize and use in formulations.
Read more about some other popular AHA's here:
Learn more about Citric AcidDibutyl Adipate is an emollient and solvent. It is created from butyl alcohol and adipic acid.
As a solvent, Dibutyl Adipate helps mix and disperse ingredients evenly.
Dibutyl Adipate is soluble in water and organic solvents. It does not absorb UV rays.
Learn more about Dibutyl AdipateWe don't have a description for Diisopropyl Sebacate yet.
Ethylhexyl Salicylate is an organic compound used to block UV rays. It primarily absorbs UVB rays but offers a small amount of UVA protection as well.
Commonly found in sunscreens, Ethylhexyl Salicylate is created from salicylic acid and 2-ethylhexanol. You might know salicylic acid as the effective acne fighter ingredient and BHA.
The ethylhexanol in this ingredient is a fatty alcohol and helps hydrate your skin, similar to oils. It is an emollient, which means it traps moisture into the skin.
According to manufacturers, Ethylhexyl Salicylate absorbs UV wavelength of 295-315 nm, with a peak absorption at 307-310 nm. UVA rays are linked to long term skin damage, such as hyperpigmentation. UVB rays emit more energy and are capable of damaging our DNA. UVB rays cause sunburn.
Learn more about Ethylhexyl SalicylateEthylhexyl 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 TriazonePentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.
The hydrophilic trait of Pentylene Glycol makes it a humectant. As a humectant, Pentylene Glycol helps draw moisture from the air to your skin. This can help keep your skin hydrated.
This property also makes Pentylene Glycol a great texture enhancer. It can also help thicken or stabilize a product.
Pentylene Glycol also acts as a mild preservative and helps to keep a product microbe-free.
Some people may experience mild eye and skin irritation from Pentylene Glycol. We always recommend speaking with a professional about using this ingredient in your routine.
Pentylene Glycol has a low molecular weight and is part of the 1,2-glycol family.
Learn more about Pentylene GlycolPropanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.Â
It’s often used to:
Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.
Learn more about PropanediolSilica, also known as silicon dioxide, is a naturally occurring mineral. It is used as a fine, spherical, and porous powder in cosmetics.
The unique structure of silica enhances the spreadability and smoothness of textures. It also works as an active carrier, emulsifier, and mattifier due to its ability to absorb excess oil.
Sodium 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 HyaluronateTocopheryl Acetate is AKA Vitamin E. It is an antioxidant and protects your skin from free radicals. Free radicals damage the skin by breaking down collagen.
One study found using Tocopheryl Acetate with Vitamin C decreased the number of sunburned cells.
Tocopheryl Acetate is commonly found in both skincare and dietary supplements.
Learn more about Tocopheryl AcetateWe don't have a description for Vp/Eicosene Copolymer yet.
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 WaterXanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.
On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.
Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.
Learn more about Xanthan GumIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Biodermal Ultra Light Sun Fluid SPF50+ 26 ingredients
ISDIN Fusion Water Magic SPF 50 30 ingredients
Reviews
Here's what our community thinks
