A leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes. The K18PEPTIDE is clinically proven to repair damage from bleach + color, chemical services and heat* – with immediate and lasting results to restore strength, softness, smoothness and bounce to hair. how to use Shampoo, do not condition. Towel-dry thoroughly Apply 3-9 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 Let sit for 4 minutes. Do not rinse out Comb, add product + style as usual. Use for 4-6 washes post-salon service, then as needed Works on all hair types – because K18PEPTIDE™ works on a molecular level (where all hair is the same), this product is effective on all hair types Head to www.k18hair.com to learn more