Leave-In Molecular Repair Hair Mask
The K18 Hair Leave-In Molecular Repair Hair Mask is a misc. Our analysis of its 21 ingredients (12 low-risk) rates it Excellent (85/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.
The K18 Hair Leave-In Molecular Repair Hair Mask is a misc. Our analysis of its 21 ingredients (12 low-risk) rates it Excellent (85/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
Dry Skin
5/2
Oily/Acne-Prone Skin
1/0
Sensitive Skin
0/10
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
1
|
|
Water
(Solvent) |
|
4
|
|
Alcohol Denat.
(Antifoaming Agent, Antimicrobial, Astringent, Masking, Solvent, Viscosity Controlling) |
Bad for Dry Skin
Bad for Sensitive Skin
|
|
3
|
B
|
Propylene Glycol
(Fragrance, Humectant, Skin Conditioningagent Miscellaneous, Solvent, Viscosity Decreasing Agent, Skin Conditioning, Viscosity Controlling) |
Good for Dry Skin
|
|
1
|
A
|
Cetearyl Alcohol
(Emulsion Stabilising, Opacifying, Foam Boosting, Viscosity Increasingagent Aqueous, Viscosity Increasing Agent, Emollient, Emulsifying, Viscosity Controlling) |
|
|
1
|
|
Dicaprylyl Ether
(Skin Conditioning, Emollient, Solvent) |
|
|
1
|
B
|
Cetyl Esters
(Skin Conditioning, Emollient) |
|
|
3
|
B
|
Behentrimonium Chloride
(Antistatic Agent, Hair Conditioning, Preservative) |
|
|
3
|
B
|
Polysorbate 20
(Emulsifying, Surfactant) |
Fungal Acne Trigger
|
|
|
Sh-Oligopeptide-78
(Hair Conditioning, Surfactant Cleansing) |
|
|
1
|
B
|
Hydrolyzed Wheat Protein
(Film Forming, Hair Conditioning, Skin Conditioning, Antistatic Agent) |
|
|
1
|
A
|
Hydrolyzed Wheat Starch
(Humectant, Skin Conditioning, Viscosity Controlling) |
|
|
2
|
A
|
Isopropyl Alcohol
(Antifoaming Agent, Fragrance, Solvent, Viscosity Decreasing Agent, Perfuming, Viscosity Controlling) |
Bad for Sensitive Skin
|
|
|
|
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning) |
|
|
4
|
A
|
Phenoxyethanol
(Fragrance, Preservative) |
Paraben
|
|
3
|
A
|
Potassium Sorbate
(Fragrance, Preservative) |
|
|
2
|
A
|
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking) |
Bad for Sensitive Skin
|
|
|
|
PARFUM
(Fragrance, Perfuming) |
|
7
|
|
Geraniol
(Fragrance, Masking, Tonic) |
Allergens
|
|
5
|
|
Linalool
(Fragrance, Deodorant, Masking) |
Allergens
|
|
5
|
|
Hexyl Cinnamal
(Fragrance, Masking) |
Allergens
|
|
5
|
A
|
Benzyl Alcohol
(External Analgesic, Fragrance, Oral Health Care Drug, Preservative, Solvent, Viscosity Decreasing Agent, Masking) |
Allergens
|
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EWG flags hazard, not real-world risk — ratings don't account for how much of an ingredient a product contains. Treat these as things to research, not verdicts. How we score →
How to use
General guidance from this product's category and active ingredients — always follow the directions on the package.
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