K18 Leave-in Molecular Repair Hair Mask 5ml. Scientists spent a decade mapping for the perfect sequence to unlock healthy hair and finally the patented K18 Peptide was found. They found a way to reverse chemical damage by guiding the shape of hair fibers.. What makes K18 so different? Conditioners temporarily smooth the outer layer of the cuticle and bonds tend to patch the hair but wash out over time. K18 reconstructs the hair structure's interchains and intrachains and will not wash out over time, in fact hair will just keep getting stronger with each treatment.. Benefits:. Reconstructs hair structure. Reconnects broken keratin chains. Renews strength, smoothness and bounce. See and feel the difference after the first use. Reverses damage caused to chemically treated and bleached. Free from sulfates, parabens, phthalates, silicones, artificial colours, sodium chloride, formaldehyde and formaldehyde donors. Vegan and cruelty-free. How to use:. Wash hair as normal but do not condition. Towel dry hair. Add one pump of the K18 mask from roots to ends. Apply evenly, adding an extra pump if needed. Leave for 4 minutes. Do not rinse out. Style as usual. For best results, use for the first 4-6 consecutive washes, then continue every 3-4 washes as needed to maintain hair strength.. Action:. Restores hair to 82% original strength after just 2 uses. This effect was proven to not wash out after several shampoos.. Dramatically reduces breakage and split ends. Reduces colour fade. Restores natural shine