Shiseido Tsubaki Premium Repair Mask Hair Pack Versus K18 Hair Leave-In Molecular Repair Hair Mask
Overview
What they are
These products are both reef safe hair masks. They have a total of 7 ingredients in common
Cool Features
They both contain Vitamin E
Suited For
They're both likely to be good for anti aging, dry 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 needs an update? Let us know.
Ingredient Info
Shiseido Tsubaki Premium Repair Mask Hair Pack 35 ingredients
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
Shiseido Tsubaki Premium Repair Mask Hair Pack 35 ingredients
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningGlycerin
Humectant
Dimethicone
Emollient
Isopentyldiol
Humectant
Hydrogenated Raspberry Seed Oil
Emollient
Behentrimonium Chloride
Preservative
Stearyl Alcohol
Emollient
Sorbitol
Humectant
Aminopropyl Dimethicone
Hydroxyethyl Urea
Humectant
Hydroxyethyl Hydroxypropyl C12-15 Alkoxypropylamine Oxide
CleansingSteartrimonium Chloride
Preservative
Lactic Acid
Buffering
Camellia Seed Oil
Phytosteryl/Octyldodecyl Lauroyl Glutamate
Skin ConditioningDimethyl Glutamic Acid
Skin ConditioningRoyal Jelly Extract
Skin Conditioning
Sodium Acetylated Hyaluronate
Humectant
Hydrolyzed Conchiolin Protein
Skin ConditioningIsopropanolamine
BufferingOctyldodecanol
EmollientAlcohol Denat.
Antimicrobial
Citric Acid
Buffering
Ammonium Lactate
BufferingButylene Glycol
Humectant
Dipropylene Glycol
MaskingAdenosine Phosphate
Skin ConditioningAmodimethicone
PPG-2-Deceth-12
EmulsifyingTocopherol
Antioxidant
Phenoxyethanol
Preservative
Benzyl Benzoate
Antimicrobial
Parfum
Masking
CI 45380
Cosmetic ColorantCI 15985
Cosmetic ColorantWater, Glycerin, Dimethicone, Isopentyldiol, Hydrogenated Raspberry Seed Oil, Behentrimonium Chloride, Stearyl Alcohol, Sorbitol, Aminopropyl Dimethicone, Hydroxyethyl Urea, Hydroxyethyl Hydroxypropyl C12-15 Alkoxypropylamine Oxide, Steartrimonium Chloride, Lactic Acid, Camellia Seed Oil, Phytosteryl/Octyldodecyl Lauroyl Glutamate, Dimethyl 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, Parfum, CI 45380, CI 15985
Water
Skin ConditioningAlcohol Denat.
Antimicrobial
Propylene Glycol
Humectant
Cetearyl Alcohol
Emollient
Dicaprylyl Ether
Emollient
Cetyl Esters
Emollient
Behentrimonium Chloride
Preservative
Polysorbate 20
Emulsifying
Sh-Oligopeptide-78
Hydrolyzed Wheat Protein
Skin ConditioningHydrolyzed Wheat Starch
Skin ConditioningIsopropyl Alcohol
Solvent
Tocopherol
Antioxidant
Phenoxyethanol
Preservative
Potassium Sorbate
Preservative
Citric Acid
Buffering
Parfum
Masking
Geraniol
Perfuming
Linalool
Perfuming
Hexyl Cinnamal
Perfuming
Benzyl Alcohol
Perfuming
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 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 WaterThis 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%.
Alcohol Denat. is an alcohol with a denaturant property. It is created by mixing ethanol with other additives.
This ingredient gets a bad rep because it is irritating and drying - mostly due to its astringent property. Astringents draw out natural oils in tissue, constricting pores and leaving your skin dried out.
However, alcohol denat. is not all that bad.
Due to its low molecular weight, alcohol denat. tends to evaporate quickly. One study on pig skin found half of applied alcohol evaporated in 10 seconds and less than 3% stayed on skin.
This also helps other ingredients become better absorbed upon application.
Studies are conflicted about whether this ingredient causes skin dehydration. One study from 2005 found adding emollients to propanol-based sanitizer decreased skin dryness and irritation. Another study found irritation only occurs if your skin is already damaged.
Small amounts of alcohol are generally tolerated by oily skin or people who live in humid environments.
The rule of thumb is if this alcohol is near the end of an ingredients list, it will probably not affect your skin much.
Also...
This ingredient has antimicrobial and solvent properties.
The antimicrobial property helps preserve products and increase their shelf life. As a solvent, it helps dissolve other ingredients.
Other types of astringent alcohols include:
Learn more about Alcohol Denat.Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
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 even out skin tone.
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.
Read more about some other popular AHA's here:
Learn more about Citric AcidTocopherol (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 TocopherolPhenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent 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.
Parfum is a catch-all term for an ingredient or more that is used to give a scent to products.
Also called "fragrance", this ingredient 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.
For instance, Habanolide is a proprietary trade name for a specific aroma chemical. When used as a fragrance ingredient in cosmetics, most aroma chemicals fall under the broad labeling category of “FRAGRANCE” or “PARFUM” according to EU and US regulations.
The term 'parfum' or '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 by INCI standards.
One example is Calendula flower extract. Calendula is an essential oil that still imparts a scent or 'fragrance'.
Depending on the blend, the ingredients in the mixture can cause allergies and sensitivities on the skin. Some ingredients that are known EU allergens include linalool and citronellol.
Parfum can also be used to mask or cover an unpleasant scent.
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 ParfumIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Shiseido Tsubaki Premium Repair Mask Hair Pack 35 ingredients
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
Reviews
Here's what our community thinks
Shiseido Tsubaki Premium Repair Mask Hair Pack 35 ingredients
Pretty overhyped imo. It did make my hair really soft so I’d imagine it’s great for those who have a lot issues with knotted hair a lot and it’s decently affordable on the Tik Tok Shop. Although it didn’t make my hair any shinier than it already was.
Before and After
I would give it 100 stars if I could. I mean I literally look forward to washing my hair because of it!
Smells heavenly and leaves my hair so soft and shiny. I am on my second tub and I have already an unopened one in my cabinet thats how much I love it.
K18 Hair Leave-In Molecular Repair Hair Mask 21 ingredients
Repaired my extremely bleach damaged hair as well as both of their shampoos.
This saved my badly damaged bleached hair.
