4-minute leave-in treatment to clinically reverse hair damage An at-home leave-in treatment infused with our patented K18Peptide™ that works to repair even the most extreme damage, renewing hair to its most youthful, healthy state.

How to use IN the shower Shampoo, do not condition. OUT of the shower Towel dry thoroughly. Begin with 1 pump of the K18 Mask and add more as needed depending on the length, thickness, and condition. Work evenly into hair from ends to roots, one pump at a time. Let sit for 4 minutes to activate. Do NOT rinse out.

 Style as usual. key benefits Our K18Peptide™ is clinically proven to reverse damage in just 4 minutes. Heals damage from bleach, color, chemical services, and heat Restores strength, softness, smoothness, and bounce Doesn’t wash away with shampoo, leaving lasting results Vegan, color-safe, cruelty-free 91% original strength* 94% original elasticity*