K18 Leave-In Molecular Repair Hair Mask – 1.7 oz / 50 mL
K18

K18 Leave-In Molecular Repair Hair Mask – 1.7 oz / 50 mL

$68.75
/
Shipping calculated at checkout.


The K18 Leave-In Molecular Repair Hair Mask is a 4-minute leave-in treatment that clinically reverses damage from bleach, color, chemical services, and heat for all hair types. Powered by the proprietary K18PEPTIDE™, it rebuilds hair at the molecular level to restore strength, softness, smoothness, and bounce.


  • Low stock - 5 items left
  • Backordered, shipping soon
  • Powered by K18PEPTIDE™ — biotech-developed peptide that repairs hair at the molecular level
  • Clinically reverses damage from bleach, color, chemical services, and heat in just 4 minutes
  • Leave-in formula — no rinse required; use for first 4–6 washes, then as needed
  • Restores hair strength, softness, smoothness, and bounce with immediate + progressive results
  • Suitable for all hair types — universal molecular repair
  • Vegan, cruelty-free, and color-safe formula
  • Full-size: 1.7 oz / 50 mL

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

  • Shampoo hair thoroughly — do not condition before applying K18.
  • Towel-dry hair until damp but no longer dripping.
  • Dispense 1 pump of mask; add more for longer or thicker hair (maximum 3 pumps).
  • Work evenly into hair from ends to roots, one pump at a time.
  • Leave in for exactly 4 minutes — do not rinse out.
  • Comb and style as usual; heat protectant or styling products may be added after 4 minutes.

Free U.S. shipping on orders over $20 — $4.95 flat rate under $20 (USPS Ground Advantage, 2–5 business days). Orders placed before 2:00 PM PT ship the same day.

Unopened, sealed items may be returned within 30 days of delivery. See our Shipping Policy and Refund Policy for full details.

  • Free U.S. shipping on orders over $20
  • Same-day shipping on orders before 2:00 PM PT

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