K18 Hair Leave-In Molecular Repair Hair Mask Versus Kérastase Soin Acide Chroma Gloss Hair Gloss

See how these products line up with your preferences

Here's our complete breakdown comparing the ingredients, attributes, and more of K18 Hair Leave-In Molecular Repair Hair Mask versus Kérastase Soin Acide Chroma Gloss Hair Gloss .

Last updated on April 19, 2024. Published on April 15, 2024

Overview

What they are

These products are both reef safe hair masks. They have a total of 8 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 oils or parabens

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.

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K18 Hair Leave-In Molecular Repair Hair Mask

Kérastase Soin Acide Chroma Gloss Hair Gloss

Hair Mask American Brand United States

Hair Mask French Brand France

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.

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.

Price

Ingredient Info

Click any item below to learn more and view relevant ingredients.

K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients

Kérastase Soin Acide Chroma Gloss Hair Gloss 21 ingredients

alcohol-free

silicon-free

fragrance-free

sulfate-free

paraben-free

oil-free

fungal-acne safe

reef-safe

eu-allergen-free

vegan

cruelty-free

alcohol-free

silicon-free

fragrance-free

sulfate-free

paraben-free

oil-free

fungal-acne safe

reef-safe

eu-allergen-free

vegan

cruelty-free

At a glance

Click on any of the items below to learn more

K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients

Kérastase Soin Acide Chroma Gloss Hair Gloss 21 ingredients

Notable Ingredients

Vitamin E

Peptides

Benefits

Hydrating

Anti-Aging

Scar Healing

Brightening

Concerns

Drying (2)

May Worsen Oily Skin (3)

Acne Trigger

Irritating (3)

Rosacea (4)

Eczema (5)

Notable Ingredients

AHA (2)

Vitamin E

Ceramides

Benefits

Hydrating

Skin Texture (2)

Reduces Large Pores (2)

Anti-Aging (2)

Dark Spots

Scar Healing (3)

Brightening (3)

Concerns

Drying

May Worsen Oily Skin (2)

Acne Trigger

Irritating (5)

Rosacea (4)

Eczema (4)

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Ingredients Compared

Ingredients that are highlighted in purple are present in both products.

K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients

Kérastase Soin Acide Chroma Gloss Hair Gloss 21 ingredients

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

Alcohol Denat. • Propylene Glycol • Water • Caprylic/Capric Triglyceride • Myristyl Alcohol • Cetearyl Alcohol • Cetrimonium Chloride • Behentrimonium Methosulfate • Parfum • Lactic Acid • Peg-14 Dimethicone • Ppg-10 Methyl Glucose Ether • Di-C12-13 Alkyl Malate • Tocopherol • Tartaric Acid • Linalool • Limonene • Geraniol • Centella Asiatica Extract • Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate • Ceramide AP

Ingredients Side-by-side

Ingredients that are highlighted in purple are present in both products.

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Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Water

What it does: Skin Conditioning, Solvent

Community Rating: Loved

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 Water

K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 1.

Kérastase Soin Acide Chroma Gloss Hair Gloss contains this as ingredient number 3.

Alcohol Denat.

What it does: Antimicrobial, Astringent, Masking, Solvent

Community Rating: Very Disliked

Alcohol Denat. is an alcohol with a denaturant property. It is created by mixing ethanol and other additives. It has a low molecular weight and will evaporate quickly. This helps other ingredients become better absorbed and dry once applied.

Alcohol Denat. is volatile and may cause irritation. It helps draw out natural oils in skin and dry out your skin.

One study from 2005 found adding emollients to propanol-based sanitizer decreased irritation.

Alcohol is antibacterial by nature. This can help preserve products and increase their shelf life.

Other types of astringent alcohols include:

Learn more about Alcohol Denat.

K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 2.

Kérastase Soin Acide Chroma Gloss Hair Gloss contains this as ingredient number 1.

Propylene Glycol

What it does: Humectant, Skin Conditioning, Solvent

Community Rating: Very Disliked

Propylene Glycol is an odorless, colorless liquid. As a humectant, it helps skin retain moisture. It also aids in delivering active ingredients.

Another role of this ingredient is preventing a product from melting or freezing. Propylene glycol also adds antimicrobrial properties to a product, elongating product lifespan.

This ingredient is considered an organic alcohol and commonly added into both cosmetics and foods.

Those with sensitive skin or conditions may deliver a rash when using this ingredient.

Learn more about Propylene Glycol

K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 3.

Kérastase Soin Acide Chroma Gloss Hair Gloss contains this as ingredient number 2.

Cetearyl Alcohol

What it does: Emollient, Emulsifying, Emulsion Stabilising

Community Rating: Very Disliked

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 Alcohol

K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 4.

Kérastase Soin Acide Chroma Gloss Hair Gloss contains this as ingredient number 6.

Tocopherol

What it does: Antioxidant, Masking, Skin Conditioning

Community Rating: Liked

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 Tocopherol

K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 13.

Kérastase Soin Acide Chroma Gloss Hair Gloss contains this as ingredient number 14.

Parfum

What it does: Masking, Perfuming

Community Rating: Very Disliked

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 Parfum

K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 17.

Kérastase Soin Acide Chroma Gloss Hair Gloss contains this as ingredient number 9.

Geraniol

What it does: Perfuming, Tonic

Community Rating: Very Disliked

Geraniol is used to add fragrance/parfum to a product. It is the main component of citronellol. It is a monoterpenoid and an alcohol.

Monoterpenes are naturally found in many parts of different plants.

Geraniol can be found in many essential oils including Rose Oil and Citronella Oil. The scent of Geraniol is often described as "rose-like". Many foods also contain Geraniol for fruit flavoring.

Geraniol can irritate the skin when exposed to air. However, irritation depends on the ability of geraniol to penetrate into the skin. In general, geraniol is not able to penetrate skin easily.

Geraniol is colorless and has low water-solubility. However, it is soluble in common organic solvents.

Like citronellol, it is a natural insect repellent.

2,6-Octadien-1-ol, 3,7-dimethyl-, (2E)-

Learn more about Geraniol

K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 18.

Kérastase Soin Acide Chroma Gloss Hair Gloss contains this as ingredient number 18.

Linalool

What it does: Perfuming

Community Rating: Very Disliked

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.