K18 Jumbo Leave-In Molecular Repair Hair Mask 100mL
by K18 · hair_care
Editor's Take
K18 earns the repair talk with real peptide technology, but the alcohol-heavy, fragranced base makes its clean-beauty halo hard to defend.
Four-pillar formula scores
- Performance: 9.2 / 10
- Innovative Ingredients: 9.5 / 10
- Clean Standards: 2.8 / 10
- Formula Sustainability: 3.6 / 10
The Verdict
Efficacy is Exceptional, and technology is Cutting Edge: K18PEPTIDE™ targets structural damage while Hydrolyzed Wheat Protein adds reinforcement beyond standard protein masks. The catch is prominent Alcohol Denat., plus fragrance and Behentrimonium Chloride, which can make repeated leave-in use drying or irritating for sensitive users. Clean alignment is Poor and sustainability is Mixed, so this is performance-first formulation with a clear environmental and gentleness trade-off. Worth it for seriously damaged, bleached hair when repair matters more than clean credentials.
Full INCI list
Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, sh-Oligopeptide-78 (K18PEPTIDE™), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol