Here's our complete breakdown comparing the ingredients, attributes, and more of Ouai Finishing Créme versus K18 Hair Leave-In Molecular Repair Hair Mask .
Last updated on October 26, 2023. Published on October 01, 2023
Overview
What they are
These products are both cruelty-free and reef safe . They have a total of 10 ingredients in common
Cool Features
They both contain Vitamin E
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin and scar healing
Free From
They both do not contain any parabens or sulfates
What's Inside
They both contain harsh alcohols, common allergens and fragrances
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.
Styling Creams & Spray
Cream and spray products that help style hair. Some spray products include blowout sprays and sea-salt sprays.
Hair Mask
Hair masks provide intense nourishment to your hair and usually need to be washed out. They can be used to treat specific hair conditions.
Ingredient Info
Ouai Finishing Créme 52 ingredients
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
Contains Alcohol
Ingredients in this product that are types of alcohol:
Contains Silicon
Ingredients in this product that are types of silicon:
Contains Fragrance
Ingredients in this product that are forms of fragrance:
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Contains Oils
Ingredients in this product that are types of oil:
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
Contains EU Allergens
Ingredients in this product that are EU allergens:
Non Vegan
This product is not vegan 😥
Cruelty Free
This product is cruelty-free 🎉
Contains Alcohol
Ingredients in this product that are types of alcohol:
Silicon Free
This product is free of silicons 🎉
Contains Fragrance
Ingredients in this product that are forms of fragrance:
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Oil Free
This product is free of oils 🎉
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
Contains EU Allergens
Ingredients in this product that are EU allergens:
Vegan
This product is vegan 🎉
Cruelty Free
This product is cruelty-free 🎉
At a glance
Click on any of the items below to learn more
Ouai Finishing Créme 52 ingredients
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
Notable Ingredients
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
Benefits
This product contains 3 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
Concerns
This product contains 1 ingredient that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
Notable Ingredients
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
Benefits
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
Concerns
This product contains 2 ingredients that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 4 ingredients that may have this attribute:
This product contains 5 ingredients that may have this attribute:
Build your routine, track which ingredients work for you, and much more with your free account.
Join SkinSortIngredients Compared
Ingredients that are highlighted in purple are present in both products.
Ouai Finishing Créme 52 ingredients
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
Water • Propanediol • Cyclopentasiloxane • Glyceryl Stearate • Peg-100 Stearate • Cetearyl Alcohol • Hydrogenated Ethylhexyl Olivate • Propanediol Dicaprylate/Caprate • Ammonium Acryloyldimethyltaurate/Vp Copolymer • Hydrogenated Olive Oil Unsaponifiables • Butyrospermum Parkii Butter • Hydrogenated Jojoba Oil • Brassica Campestris/Aleurites Fordi Oil Copolymer • Laurdimonium Hydroxypropyl Hydrolyzed Keratin • Hydrolyzed Vegetable Protein Pg-Propyl Silanetriol • Leuconostoc/Radish Root Ferment Filtrate • Peg-8 Beeswax • Oryza Sativa Bran Oil • Steareth-21 • Diisostearyl Malate • Polyquaternium-11 • Cynara Scolymus Leaf Extract • Cystine Bis-Pg-Propyl Silanetriol • Bis-Diglyceryl Polyacyladipate-2 • Polysilicone-15 • C32-36 Isoalkyl Stearate • Stearyl Behenate • Polyhydroxystearic Acid • Polyglyceryl-3 Stearate • Polysorbate 60 • Ethylhexylglycerin • Tocopherol • BHT • Glycerin • Citric Acid • Hydroxyethylcellulose • Disodium EDTA • Disodium Phosphate • Sodium Phosphate • Pentylene Glycol • Benzyl Alcohol • Chlorphenesin • Sodium Benzoate • Potassium Sorbate • Phenoxyethanol • Parfum • Benzyl Benzoate • Benzyl Salicylate • Citronellol • Hexyl Cinnamal • Hydroxycitronellal • Linalool
Water • Alcohol Denat. • Propylene Glycol • Cetearyl Alcohol • Dicaprylyl Ether • Cetyl Esters • Behentrimonium Chloride • Polysorbate 20 • Sh-Oligopeptide-78 • Hydrolyzed Wheat Protein • Hydrolyzed Wheat Starch • Isopropyl Alcohol • Tocopherol • Phenoxyethanol • Potassium Sorbate • Citric Acid • Parfum • Geraniol • Linalool • Hexyl Cinnamal • Benzyl Alcohol
Ingredients Side-by-side
Ingredients that are highlighted in purple are present in both products.
Learn more about what what Com. / Irr. ratings are
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. Talk about multi-purpose! If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterOuai Finishing Créme contains this as ingredient number 1.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 1.
Cetearyl alcohol is a mixture of two fatty alcohols: cetyl alcohol and stearyl alcohol. It is mainly used as an emulsifier. Emulsifiers help prevent the separation of oils and products. Due to its composition, it can also be used to thicken a product or help create foam.
Cetearyl alcohol is an emollient. Emollients help soothe and hydrate the skin by trapping moisture.
Studies show Cetearyl alcohol is non-toxic and non-irritating. The FDA allows products labeled "alcohol-free" to have fatty alcohols.
This ingredient is usually derived from plant oils such as palm, vegetable, or coconut oils. There is debate on whether this ingredient will cause acne.
Due to the fatty acid base, this ingredient may not be Malassezia folliculitis safe.
Learn more about Cetearyl AlcoholOuai Finishing Créme contains this as ingredient number 6.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 4.
Tocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.
Vitamin E also helps keep your natural skin lipids healthy. Your lipid skin barrier naturally consists of lipids, ceramides, and fatty acids. Vitamin E offers extra protection for your skin’s lipid barrier, keeping your skin healthy and nourished.
Another benefit is a bit of UV protection. Vitamin E helps reduce the damage caused by UVB rays. (It should not replace your sunscreen). Combining it with Vitamin C can decrease sunburned cells and hyperpigmentation after UV exposure.
You might have noticed Vitamin E + C often paired together. This is because it is great at stabilizing Vitamin C. Using the two together helps increase the effectiveness of both ingredients.
There are often claims that Vitamin E can reduce/prevent scarring, but these claims haven't been confirmed by scientific research.
Learn more about TocopherolOuai Finishing Créme contains this as ingredient number 32.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 13.
Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
If you spot Citric Acid near the end of an ingredient list, it's likely there as a pH adjuster rather than an active ingredient.
As an AHA, Citric Acid removes the top layer of skin cells from the newer layer of skin underneath. This helps skin to remove dark spots and look more even.
Read more about some other popular AHA's here:
Learn more about Citric AcidOuai Finishing Créme contains this as ingredient number 35.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 16.
Benzyl Alcohol is most commonly used as a preservative. It also has a subtle, sweet smell. Small amounts of Benzyl Alcohol is not irritating and safe to use in skincare products. Most Benzyl Alcohol is derived from fruits such as apricots.
Benzyl Alcohol has both antibacterial and antioxidant properties. These properties help lengthen the shelf life of products. Benzyl Alcohol is a solvent and helps dissolve other ingredients. It can also improve the texture and spreadability.
Alcohol comes in many different forms. Different types of alcohol will have different effects on skin. This ingredient is an astringent alcohol.
Using high concentrations of these alcohols are drying on the skin. They may strip away your skin's natural oils and even damage your skin barrier. Astringent alcohols may also irritate skin.
Other types of astringent alcohols include:
According to the National Rosacea Society based in the US, you should be mindful of products with these alcohols in the top half of ingredients.
Any type of sanitizing product will have high amounts of alcohol to help kill bacteria and viruses.
Learn more about Benzyl AlcoholOuai Finishing Créme contains this as ingredient number 41.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 21.
Potassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic and food products.
Potassium sorbate is potassium salt derived from sorbic acid. Sorbic acid is a natural antibiotic and effective against fungus.
Potassium sorbate and sorbic acid can be found in baked goods, cheeses, dried meats, dried fruit, ice cream, pickles, wine, yogurt, and more.
Potassium sorbate is often used with stronger preservatives.
Learn more about Potassium SorbateOuai Finishing Créme contains this as ingredient number 44.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 15.
Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent germ and 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.
Ouai Finishing Créme contains this as ingredient number 45.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 14.
Parfum is a catch-all term for an ingredient or more that is used to give aroma to products. Parfum, or fragrance, can be a blend of hundreds of chemicals or plant oils. This means every product with "fragrance" or "Parfum" in the ingredients list is a different mixture.
In the US, the alternative name for parfum is 'fragrance'. The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term.
For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance. One example is Calendula flower extract. Essential oil ingredients still impart a scent or 'fragrance'.
Depending on the blend, it can cause allergies and sensitivities on the skin. Some ingredients that are known EU allergens include linalool and citronellol.
Products use parfum often to give products a scent or cover up smells of different ingredients.
The bottom line is: not all fragrances/parfum/ingredients are created equally. If you are worried about fragrances, we recommend taking a closer look at an ingredient. And of course, we always recommend speaking with a professional.
Learn more about ParfumOuai Finishing Créme contains this as ingredient number 46.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 17.
Hexyl Cinnamal is a fragrance ingredient with a similar scent to jasmine. It can be naturally found in chamomile essential oil.
This ingredient is a known EU allergen and may sensitize the skin. The EU requires this ingredient to be listed separately on an ingredients list.
Hexyl Cinnamal is not water soluble but is soluble in oils.
Learn more about Hexyl CinnamalOuai Finishing Créme contains this as ingredient number 50.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 20.
Linalool is a fragrance and helps add scent to products. It's derived from common plants such as cinnamon, mint, citrus, and lavender.
Linalool has the same effect as Limonene when exposed to air. Oxidized linalool can cause allergies and skin sensitivity.
Linalool has a scent that is floral, spicy tropical, and citrus-like.
Learn more about LinaloolOuai Finishing Créme contains this as ingredient number 52.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 19.
Here's what our community thinks of the ingredients in these two products.
Ouai Finishing Créme 52 ingredients
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
Usage
Here's some more info on how this product is used by our community.
When to use
Ouai Finishing Créme 52 ingredients
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
Reviews
Here's what our community thinks
Ouai Finishing Créme 52 ingredients
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
Alternatives
Our Dupe Finder has found 2 potential alternatives that have similar ingredients to Ouai Finishing Créme.
See 2 alternativesOur Dupe Finder has found 50 potential alternatives that have similar ingredients to K18 Hair Leave-In Molecular Repair Hair Mask.
See 50 alternatives