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. 
  
• 
  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. 
  
• 
  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. 

Keep out of reach of children.