K18 Leave-in Molecular Repair Hair Mask - 50ml A leave-in treatment mask for all hair types that clinically reverses damage in 4 minutes. The patented peptide technology works to repair damage from bleach, color, chemical services & heat – restoring strength, softness, smoothness, and bounce to hair. 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 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. Do's and don'ts DO use a clarifying shampoo if you’re a heavy product or dry shampoo user to remove buildup and help our peptide penetrate and get where it needs to go. DO wait the full 4 minutes before styling or applying other product DO use every 4-6 shampoos consecutively to see and feel ongoing results DON’T condition your hair before application (trust us, most won’t need it after K18, if you still need, add a leave-in after the 4-minute window is up post-application) DON’T overuse, a little goes a long way. DON’T rinse out. This is a leave-in, so you know, leave it in!