K18 Leave-In Molecular Repair Hair Mask – 5 oz / 150 mL
K18's Leave-In Molecular Repair Hair Mask uses the patented K18PEPTIDE™ to reverse damage from bleach, color, chemical services, and heat in just 4 minutes — no rinse needed. Ideal for dry, damaged, or chemically treated hair, it restores strength, softness, smoothness, and bounce at the molecular level.
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- Powered by patented K18PEPTIDE™ (sh-Oligopeptide-78) to reconnect broken polypeptide chains
- Clinically proven to reverse damage from bleach, color, chemical services, and heat
- Leave-in formula — activates in 4 minutes, no rinsing required
- Restores strength, softness, smoothness, and bounce to hair
- Professional/jumbo size: 150 mL / 5 oz
- Paraben-free and sulfate-free formula
- Vegan and cruelty-free
- Suitable for all hair types, especially bleached, highlighted, or chemically treated hair
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 as normal; do not condition.
- Towel dry hair thoroughly until damp.
- Start with 1 pump and work evenly into hair from ends to roots.
- Add more pumps as needed based on hair length, thickness, and condition.
- Allow to sit for 4 minutes to activate the K18PEPTIDE™.
- Do NOT rinse out — style as usual.
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