K18 Leave-In Hair Repair Mask, 50ml

Product Information

Wait 4 minutes (do not rinse), then apply 1-3 drops of K18 molecular repair hair oil to mid-lengths and ends. For best results, we recommend to use K18 chelator before every service. If not using K18 chelator, lightly dampen hair with water (do not saturate) before applying K18 PRO mist. Before the service, apply K18 professional molecular repair hair mist. Wait 4 minutes. Do not rinse out. The K18 Leave-In Molecular Repair Hair Mask is an award-winning haircare product—it’s been compared to (and is purportedly more effective than) the industry standard, Olaplex’s No. 8 hair mask. K18’s hair mask has even been hailed as a replacement for conditioner. Does it actually work? Four W editors put it to the test, and gave their honest opinions.

Towel dry hair, then apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, or level of damage. I have used it multiple times since trying it the first time, so yes! I now use it at least once every two weeks. Hannah Westbrook, Assistant Visuals EditorWhen using the K18 Leave-In Molecular Repair Hair Mask, did you follow the directions step-by-step or modify them at all? Wait 4 minutes, then apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, starting at the ends and working up towards the roots. Wait 3-4 shampoos post-treatment before using the K18 molecular repair hair mask in the salon or at home.

Towel dry hair, then apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, only to the ends and mid-lengths (avoiding the root). By reconnecting these polypeptide chains, the mask strengthens along the length and width of the hair, offering a full 360 approach. Comb and style your hair as usual – it’s fine to add any heat protectant or styling products at this stage. Apply 1-3 drops of K18 molecular repair hair oil to mid-lengths and ends on dry hair as a finisher. In comparison, Olaplex uses patented Olaplex Bond Building Technology ™, that rebuilds broken disulfide bonds to restore strength. The brand's popular weekly pre-shampoo treatment repairs and prevents damage, whereas the K18 mask works to restore your hair to its previous state.For cases of extreme metal + mineral buildup, process up to 10 minutes, then proceed with the instructions. My hair has been dehydrated with the sun and heat damage of summer, so this was perfect timing to try K18. It was not time-consuming. I used it every time I washed my hair for two weeks, and used about 3-4 pumps each time because of my long hair. I thought using it every time I washed my hair might be overkill, but for how coarse my hair is, it works perfectly . It's worth noting that the brand recommends working it into the hair from the ends to the roots, however I did actually avoid the roots at first as I was worried about them looking (and feeling) greasy.

I always worry that my hair will feel greasy after using moisturizing products/treatments, but this dries naturally and doesn’t leave any residue. I would say that maybe my hair is too damaged for this to repair, as I did notice it felt softer, but there definitely are still a lot of split ends in there. I was hesitant about not using conditioner and using K18 as a leave-in conditioner instead, but it made my hair feel significantly softer. I like how it is not heavy or does not change the weight of my hair. I still used my hair oil to control frizz, but my hair is naturally on the frizzier side. I saw real results in a short amount of time. I loved it and will continue using it! This size of the bottle is also perfect for traveling this summer. Jenna Wojciechowski, Fashion Market Editor

Towel dry thoroughly, then re-apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, starting at the ends and working up towards the roots. Process your lightener or color as usual, then rinse and shampoo with K18 PEPTIDE PREP™ detox shampoo. Do not condition. K18 is suitable for use on all human hair extensions (to include tape-in, k-tip, hand tied, clip-in, sew-in, etc.). For information on using K18 on clients with previously installed extensions, please follow the instructions for the specific service being performed. Wait 4 minutes (do not rinse out). Then follow with the recommended shampoo per your keratin straightener service instructions. Strengthen your hair and improve elasticity whilst reversing the damage caused by chemical treatments, mechanical styling, and heat styling. This leave-in treatment takes just 4 minutes to reverse hair damage by harnessing the power of the K18PEPTIDE™. Working at the innermost layer of your hair, the K18PEPTIDE™ reconnects the polypeptide chains and disulfide bonds that are broken because of chemical services, heat damage, and bleaching services. The peptide helps to renew strength and elasticity, giving you healthier, bouncy hair – even in cases of severe damage.

Apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, starting at the ends and working up towards the roots. Let sit for 4 minutes. Do not rinse out. If toning, use K18 PRO mist first, wait 4 minutes, then apply toner directly over PRO mist. Process as usual. Rinse or shampoo toner + apply K18 PRO mask per instructions above. Wait 4 minutes (do not rinse out) and if needed, dry the hair prior to beginning relaxer application.Apply a minimum of 10 full sprays of K18 professional molecular repair hair mist per quadrant, increasing up to 20 sprays as needed, depending on client’s length, density, or level of damage. Wait 4 minutes after chelating** (do not rinse out), then apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, or level of damage.