Here's our complete breakdown comparing the ingredients, attributes, and more of Shiseido Tsubaki Premium Repair Mask Hair Pack versus K18 Hair Leave-In Molecular Repair Hair Mask .
Published on April 19, 2023
Overview
What they are
These products are both reef safe hair masks. They have a total of 6 ingredients in common
Cool Features
They both contain Vitamin E
Suited For
They're both likely to be good for dry skin and brightening skin
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.
Price
Ingredient Info
Shiseido Tsubaki Premium Repair Mask Hair Pack 31 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 😥
Not Cruelty Free
This product is not 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
Shiseido Tsubaki Premium Repair Mask Hair Pack 31 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 2 ingredients 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 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:
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:
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Join SkinSortIngredients Compared
Ingredients that are highlighted in purple are present in both products.
Shiseido Tsubaki Premium Repair Mask Hair Pack 31 ingredients
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
Water • Glycerin • Dimethicone • Isopentyldiol • Hydrogenated Rapeseed Alcohol • Behentrimonium Chloride • Stearyl Alcohol • Sorbitol • Aminopropyl Dimethicone • Hydroxyethyl Urea • Dihydroxypropyl Arginine Hcl • Steartrimonium Chloride • Camellia Seed Oil • Lauroyl Glutamic Acid • Royal Jelly Extract • Sodium Acetylated Hyaluronate • Hydrolyzed Conchiolin Protein • Isopropanolamine • Octyldodecanol • Alcohol Denat. • Citric Acid • Ammonium Lactate • Butylene Glycol • Dipropylene Glycol • Adenosine Phosphate • Amodimethicone • Ppg-2-Deceth-12 • Tocopherol • Phenoxyethanol • Benzyl Benzoate • Hc Yellow No. 4
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 WaterShiseido Tsubaki Premium Repair Mask Hair Pack contains this as ingredient number 1.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 1.
This ingredient is a preservative and often used for it's anti-static properties. You'll most likely see this ingredient in hair conditioners.
It does not cause irritation or sensitization in leave-on products at 1-5%.
Shiseido Tsubaki Premium Repair Mask Hair Pack contains this as ingredient number 6.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 7.
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.Shiseido Tsubaki Premium Repair Mask Hair Pack contains this as ingredient number 21.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 2.
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 AcidShiseido Tsubaki Premium Repair Mask Hair Pack contains this as ingredient number 22.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 16.
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 TocopherolShiseido Tsubaki Premium Repair Mask Hair Pack contains this as ingredient number 29.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 13.
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.
Shiseido Tsubaki Premium Repair Mask Hair Pack contains this as ingredient number 30.
K18 Hair Leave-In Molecular Repair Hair Mask contains this as ingredient number 14.
Here's what our community thinks of the ingredients in these two products.
Shiseido Tsubaki Premium Repair Mask Hair Pack 31 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
Shiseido Tsubaki Premium Repair Mask Hair Pack 31 ingredients
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
Reviews
Here's what our community thinks
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
Alternatives
Our Dupe Finder has found 7 potential alternatives that have similar ingredients to Shiseido Tsubaki Premium Repair Mask Hair Pack.
See 7 alternativesOur Dupe Finder has found 50 potential alternatives that have similar ingredients to K18 Hair Leave-In Molecular Repair Hair Mask.
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