K18 Biomimetic Hairscience Professional Leave-In Molecular Repair Mask 5 fl. oz.

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 biomimetic peptide 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 (pH 5.0–6.0) to minimize cuticle swelling, the lightweight cream 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. 

Key benefits

• 
  the K18PEPTIDE™ biomimetic peptide penetrates to reconnect polypeptide chains and disulfide bonds for reinforced strength along the length and width of the hair. 
  
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  a convenient leave-in cream that works in 4 minutes with no rinse required, making it ideal for in-salon or at-home use as a restorative step. 
  
• 
  formulated at pH 5.0–6.0 to minimize cuticle swelling and place hair proteins in their most resilient state. 
  
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  because the peptide acts on hair’s molecular structure, the treatment is effective across all hair types and levels of damage.
  

Suitability
Vegan, color-safe, cruelty-free. Works for all hair types and is clinically proven to repair damage caused by bleach + color, heat and chemical services—delivering progressive, lasting repair 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. 

Dos & Don'ts (professional reminders — from the page)

• DO apply on clean, damp hair and wait the full 4 minutes before combing or styling. DO use for 4–6 shampoos consecutively for progressive results.
• DO clarify/remediate for heavy product, mineral or metal buildup before application.
• DON'T condition before K18 (conditioning can leave a film that blocks the peptide). DON'T rinse out the mask. DON'T overdo it—less is more. 

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.