K18 Biomimetic Hairscience Professional Leave-In Molecular Repair Mask 0.5 fl. oz.

Full-Size Leave-In Molecular Repair Hair Mask is a salon-grade, leave-in treatment that repairs hair on a molecular level in just 4 minutes. Powered by the biotech-developed K18PEPTIDE™, the lightweight cream reconnects broken polypeptide chains (and, as a result, disulfide bonds) to restore strength, softness, smoothness and bounce across all hair types and levels of damage. pH-optimized (5.0–6.0) to minimize cuticle swelling, the mask is applied to clean, towel-dried hair (use 1–3 pumps based on length and density), left on for 4 minutes (do not rinse), then combed and styled; use for 4–6 washes after a salon service, then as needed for progressive, lasting repair. Vegan, color-safe and cruelty-free.

Key benefits & technology (professional summary)

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  : a biotech-developed peptide that mimics hair structure to reconnect polypeptide chains and disulfide bonds, enabling core strength and elasticity renewal.
  
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  : 4-minute working time with no rinse required, making it practical for salon protocols and at-home maintenance.
  
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  and cream format for minimal cuticle swelling, easy application, detangling and lightweight softness across all hair types.
  All of the above claims and technical calls are taken directly from the product page.
  

Suitability

Vegan, color-safe and cruelty-free. Formulated for all hair types and clinically proven to repair damage caused by bleach + colour, heat and chemical services when used as directed.

1. Shampoo, do not condition. Towel-dry thoroughly.
2. Apply 1–3 pumps of K18 leave-in molecular repair hair mask based on your length and density, starting at the ends and working up towards the roots.
3. Let sit for 4 minutes. Do not rinse out.
4. Comb, add product + style as usual. Use for 4–6 washes post-salon service, then as needed. 

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.