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Brand: K18

K18 Leave-In Molecular Repair Mask 50ml

(97 customer reviews)

Original price was: NZD $135.90.Current price is: NZD $108.72.

4-minute leave-in treatment to reverse damage.
Hair like new. This leave-in mask heals and strengthens hair with lightweight moisturizing benefits to detangle and keep hair smooth and soft, without weighing it down. Please see dosage chart for exact usage. For best results, use for the first 4-6 consecutive washes following a service, and then every 3-4 washes as needed to maintain hair strength.

Description

Use:

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

Best for: All hair types.

97 reviews for K18 Leave-In Molecular Repair Mask 50ml

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4.9
Based on 97 reviews
  1. Avatar

    Jo Knight (verified owner)

    nzAuckland, New Zealand

    (0) (3)
  2. Avatar

    Shannon Lee (verified owner)

    nzNew Zealand

    Amazing product, I am so glad I purchased this, it’s saved my hair and I’ve already seen a huge improvement! And it makes it feel amazing so that’s a bonus!

    (1) (0)
  3. Avatar

    Kelly (verified owner)

    nzAuckland, New Zealand

    So easy to use (great for a busy mum!) and noticeably different hair after first treatment. Would definitely recommend

    (1) (0)
  4. Avatar

    Karla H. (verified owner)

    nzNew Zealand

    In love with this product! My hair feels amazing. Awesome service and fast postage too, thank you so much 🤩

    (0) (0)
  5. Avatar

    Raye (verified owner)

    nzNew Zealand

    Recommended to me by a fellow frizzie haired friend. Have spent thousands on salon treatments & straightening products. This stuff is incredible & does just what they claim it does. Haven’t looked back since.

    (1) (0)
  6. Avatar

    LIZ (verified owner)

    nzAuckland, New Zealand

    Fantastic product. Blonde hair never shines now my hair has shine. Pricey but well worth every cent highly recommend

    (1) (0)
  7. Avatar

    Jessica G. (verified owner)

    nzCanterbury, New Zealand

    I have used twice and can notice a difference already. Great service from Synergy and fast shipping

    (0) (0)
  8. Avatar

    Aimee (verified owner)

    nzNew Zealand

    A product that really works!

    (0) (0)
  9. Avatar

    Rikki-Lee Howard-Cagabcab (verified owner)

    nzAuckland, New Zealand

    This saved my hairs life I have been using this product after damaging by my hair and I used this every time I washed my hair and the results are mind blowing

    (0) (0)
  10. Avatar

    Rachel T. (verified owner)

    nzNew Zealand

    Highly recommend this stuff! I’ve used it 4 times so far and my hair looks and feels AMAZING!

    (0) (0)
  11. Avatar

    Hannah (verified owner)

    nzNew Zealand

    Unbelievable! I never leave reviews because I am ultimately lazy but I couldn’t let this go without saying something. This product is actually incredible, my hair feels like silk and it looks like I’ve just had a hair cut. I’ve never ever experienced a product that worked so well. I’m in for life.

    (3) (0)
  12. Avatar

    Sylvie W. (verified owner)

    nzAuckland, New Zealand

    Amazing after one use I can really see the difference. I read reviews before buying as it’s pricey but so worth the investment in your hair ♥️♥️♥️

    (0) (0)
  13. Avatar

    Ingrid Dukker (verified owner)

    nzAuckland, New Zealand

    (0) (0)
  14. Avatar

    Charlotte Anderson (verified owner)

    nzNew Zealand

    Even after the first use of this my hair felt so much better, so much softer and sat so nice naturally. Highly recommend!

    (0) (0)
  15. Avatar

    Anonymous (verified owner)

    nzNew Zealand

    Amazing product! Synergy; great company to buy from- thank you!

    (0) (0)
  16. Avatar

    Jessica G. (verified owner)

    nzCanterbury, New Zealand

    As a bleach blonde this stuff is a lifesaver. Repeat buyer and will be buying again.

    (0) (0)
  17. Avatar

    Sarah (verified owner)

    nzAuckland, New Zealand

    Due to a dying and stripping accident, my hair was extremely chemically damaged and it was going to have to be all cut off. After purchasing this product, my long hair is back to a healthy looking condition (about 90% better). This is my third bottle which will take it back and beyond what it was. As pricey as it is, it was worth it.

    (3) (1)
  18. Avatar

    Michelle C. (verified owner)

    nzAuckland, New Zealand

    Brilliant stuff, it has totally rescued my hair… highly recommend

    (0) (0)
  19. Avatar

    Teri T. (verified owner)

    nzCanterbury, New Zealand

    My hair should be looking like a clown with how thin it it and how many times I have bleached, chemically straightened it and generally dyeing with colors. This product helps with the damage and make it become as healthy as possible. I will continue buying! ❤️

    (0) (0)
  20. Avatar

    Anonymous (verified owner)

    nzNew Zealand

    Amazing. Repaired my super damaged hair very quickly. I’d tried Kerastase Resistance and Olaplex previously, and for a long time … they don’t even come close to the repair I got from K18

    (1) (0)
  21. Avatar

    Lisa Wilson (verified owner)

    nzAuckland, New Zealand

    My daughter 13 and is a swimmer with super curly hair. This product is the best for her hair to prevent damage and help keep the curl banging!

    (0) (0)
  22. Avatar

    Keiren (verified owner)

    nzNew Zealand

    Amazing product. I can definitely feel the difference in my hair after using it.

    (0) (0)
  23. Avatar

    Anonymous (verified owner)

    nzNew Zealand

    Excellent product. Product arrived within two days, wow. Thank you for the extremely fast service.

    (0) (0)
  24. Avatar

    Sandy (verified owner)

    nzNew Zealand

    The first time I used K18 I noticed a significant difference.
    My hair is coarse, dry and brittle this product is like magic! I’ve spent $1000’s on haircare products promising ‘amazing results’ but not for me, however K18 is working for me! I love it and how it’s healing my hair to be healthy!!

    (0) (0)
  25. Avatar

    Sophie (verified owner)

    nzNew Zealand

    Amazing , noticable diffrence in my over processed hair.Hair instantly feels better an naturally dries well.10/10

    (0) (0)
  26. Avatar

    Doris (verified owner)

    nzAuckland, New Zealand

    The best product I have ever tried (and the dearest)!!!! I guess you get what you pay for!!! 🥰

    (0) (0)
  27. Avatar

    Michelle (verified owner)

    nzNew Zealand

    Excellent product

    (0) (0)
  28. Avatar

    Jessica Garing (verified owner)

    nzAuckland, New Zealand

    This is my holy grail product. I will continue to purchase its saved my bleach blonde hair

    (0) (0)
  29. Avatar

    Katie Holmes (verified owner)

    nzNew Zealand

    Purchase was so easy and came in the mail super fast!!!

    (0) (0)
  30. Avatar

    Kerstine V. (verified owner)

    nzAuckland, New Zealand

    Pricey but so worth it.
    I only use a pump for my hair. I have used it 6x and have seen noticeable results already

    (0) (0)
  31. Avatar

    Anonymous (verified owner)

    nzNew Zealand

    Amazing product. I’d have given up on being blonde by now if not for this. It’s easy to use and has repaired incredibly damaged bleached hair to the point where it actually feels like healthy hair again.

    (1) (0)
  32. Avatar

    Morgan M. (verified owner)

    nzNew Zealand

    I love how quick it is to use, just pop it in post shower no need to rinse! It’s done wonders for my bleach damaged hair.

    (0) (0)
  33. Avatar

    Jackie Sanders (verified owner)

    nzWellington, New Zealand

    In general I find synergy amazing. Hence the 5 stars.
    Unfortunately the k18 I received had a broken pump. Which I know is not synergy’s fault. I could have returned it, but I kept it as wanted the product. Had to pry it open.

    (0) (0)
  34. Avatar

    Georgia Langridge (verified owner)

    (0) (0)
  35. Avatar

    Sharni (verified owner)

    This product is amazing!

    (0) (0)
  36. Avatar

    Selena D. (verified owner)

    nzNew Zealand

    Had been wanting this product for so long! Was processed quickly after ordering and received updates along the way. Definitely my new go to website for ordering products.

    (0) (0)
  37. Avatar

    Nicky (verified owner)

    nzAuckland, New Zealand

    (0) (0)
  38. Avatar

    Frances (verified owner)

    nzAuckland, New Zealand

    Such a good product! Expensive, yes, but my thick wavy, dyed (I’m 67 so naturally grey) hair is left soft and shiny and feels young again!

    (1) (0)
  39. Avatar

    Anonymous (verified owner)

    nzNew Zealand

    Seems to be working well on my bleached hair

    (1) (0)
  40. Avatar

    Jude Houghton (verified owner)

    nzAuckland, New Zealand

    Great product

    (0) (1)
  41. Avatar

    Jacqueline Sanders (verified owner)

    nzCanterbury, New Zealand

    K18 is amazing. Synergyhair as always amazing . Fast delivery
    My no 1 hair care place

    (0) (0)
  42. Avatar

    Doreen (verified owner)

    nzNew Zealand

    Works so well!

    (0) (0)
  43. Avatar

    Anonymous (verified owner)

    nzWaikato, New Zealand

    (0) (0)
  44. Avatar

    Crystal Tuhaka (verified owner)

    nzWaikato, New Zealand

    All the top colorists in the world use K18 which is why I bought it and they are right!!! It’s well worth it!!!

    (0) (0)
  45. Avatar

    Elyana

    my hair type is oily on the root side and very dry on the end side and can be very hard to manage and frizzy. After bleach and got my hair coloured, the texture of my hair was worst! It was dry and no matter how many treatment products I use.. it didnt work.. I almost gave up on my hair and thought tho just cut it short.. but then I saw a lady on the YouTube channel sharing how K18 has improved her hair. Was very skeptical but I purchased it anyway and wow.. my hair felt like it is reborn. It is now shiny, it shows its own wave.. and I don’t need too many products after I have this product. Just the shampoo and this mask. My hair is now bouncy and shiny and I can’t believe how good my hair looks now. Thank you to the scientists who developed this formula for the past 10 years.. I feel confident flashing my dyed hair now.. its pricey.. but well worth it.

    (1) (0)
  46. Avatar

    Anonymous (verified owner)

    nzNew Zealand

    It works wonders, second treatment now 🙂

    (0) (0)
  47. Avatar

    Hayden (verified owner)

    nzCanterbury, New Zealand

    (0) (0)
  48. Avatar

    Maria-Antonieta Diaz-Ruiz (verified owner)

    nzNew Zealand

    Amazing product. You can see results in the first application

    (0) (0)
  49. Avatar

    Jacqueline (verified owner)

    nzNew Zealand

    After one use it lived up to the hype already. I have wavy bleached hair that was SUFFERING in the NZ humidity. After one use my split ends are drastically improved, frizz decreased, hair is smoother and shinier. My goodness she (K18) was pricey but so is getting your hair done in NZ and I’d say K18 would save me a trip or three to the hairdresser thus justifying the price tag. If I had to choose K18 or Olaplex, K18 would have it. Stay tuned for what it will do after 2 uses

    (1) (0)
  50. Avatar

    Suzanne (verified owner)

    nzNew Zealand

    Awesome product, Hair felt amazing after 1st use.

    (0) (0)
  51. Avatar

    Gemma R. (verified owner)

    nzNew Zealand

    fabulous treatment – really helps my hair

    (0) (0)
  52. Avatar

    Lisa Watson (verified owner)

    nzNew Zealand

    Awesome service arrived the next day!

    (0) (0)
  53. Avatar

    georgie (verified owner)

    nzNew Zealand

    used olaplex for years … but this is next level! such a big difference in health and thickness of my bleach blonde ruined hair in three months (it had previously snapped off to a mullet above my shoulders) andres s now mid back and full of life

    (0) (0)
  54. Avatar

    Anonymous (verified owner)

    Love it definitely recommend this product really helped repair my dry damaged hair

    (0) (0)
  55. Avatar

    Anonymous (verified owner)

    nzNew Zealand

    My dry curly hair was instantly revived

    (0) (0)
  56. Avatar

    Cristina S. (verified owner)

    nzNew Zealand

    Amazing what this product can do! My hair is heavily bleached and the results after one use are crazy!

    (0) (0)
  57. Avatar

    Janine Bryce (verified owner)

    YOU NEED THIS. If you have any kind of damage, from styling to colouring to anything. I know, it’s seems like a huge amount to spend on such a little bottle, but it really does go a loooong way. Reading in the instructions about not conditioning and thinking about how much conditioner my fine wavy hair eats, I thought that it would last one application, but you only need a few mls and it’s ridiculously easy. GET THIS!!!!

    (0) (0)
  58. Avatar

    Kate (verified owner)

    Haven’t used this for long enough to speak with much authority, but… I’m hoping it restores my hairs health at some point! Not sure if it’s worth the price as yet, but maybe…?

    (0) (0)
  59. Avatar

    Michelle (verified owner)

    nzWaikato, New Zealand

    Great product

    (0) (0)
  60. Avatar

    Cam (verified owner)

    nzNew Zealand

    Makes my hair really soft and manageable

    (0) (0)
  61. Avatar

    Jacqueline Sanders (verified owner)

    nzWellington, New Zealand

    As always synergy u rock .wouldn’t go anywhere else

    (0) (0)
  62. Avatar

    Maria-Antonieta (verified owner)

    nzNew Zealand

    What an amazing product. You’ll see results from first application.

    (0) (0)
  63. Avatar

    Brigid Kissick (verified owner)

    nzAuckland, New Zealand

    (0) (0)
  64. Avatar

    Laura (verified owner)

    nzNew Zealand

    My hair is quite damaged and dry and already noticed a significant difference after one use

    (0) (0)
  65. Avatar

    Alexis Watson (verified owner)

    nzCanterbury, New Zealand

    (0) (0)
  66. Avatar

    Brandy (verified owner)

    nzNew Zealand

    Really liking the feeling of this, noticed how soft my hair has gotten and my breakage has softened so its not as obvious. Look forward to seeing more results 🙌

    (0) (0)
  67. Avatar

    Saskia v. (verified owner)

    nzBay of Plenty, New Zealand

    (0) (0)
  68. Avatar

    Karen (verified owner)

    nzTaranaki, New Zealand

    My hairdresser has started using this on her clients and was telling me the science behind it. Decided to purchase and have not been disappointed.

    (0) (0)
  69. Avatar

    Virginia (verified owner)

    nzNew Zealand

    Both my daughter and I were really happy with the results from this product; our hair looks so much healthier! I have just purchased our second bottle.

    (0) (0)
  70. Avatar

    Maria-Antonieta (verified owner)

    nzNew Zealand

    The best product to repair your hair ever

    (0) (0)
  71. Avatar

    Anonymous (verified owner)

    nzNew Zealand

    (0) (0)
  72. Avatar

    Jacqueline Sanders (verified owner)

    nzWellington, New Zealand

    See my previous review. K18, great stuff.
    Synergy you rock.x

    (0) (0)
  73. Avatar

    Mel Z. (verified owner)

    I have only used it once so far but my hair feels smoother and stronger. Definitely glad I brought this

    (0) (0)
  74. Avatar

    Shirley (verified owner)

    Have used this product x2 and my hair feeling a lot softer fingers crossed after recommended 6 uses will be worth the high price

    (0) (0)
  75. Avatar

    Veronica C. (verified owner)

    nzNew Zealand

    I keep re-purchasing it does make my hair stronger.

    (0) (0)
  76. Avatar

    Anonymous (verified owner)

    nzAuckland, New Zealand

    Really love this. Is helping with my damaged hair

    (0) (0)
  77. Avatar

    Lisa Wilson (verified owner)

    nzAuckland, New Zealand

    My daughter is 14 and a swimmer. This product works wonders on her super curly hair. I use it when I feel like my hair could use some love, but I find I don’t need it often now that I have restored my hair.

    (0) (0)
  78. Avatar

    Alex (verified owner)

    nzNew Zealand

    I’ve been using this product for months now and its amazing! Highly recommended for damaged, broken hair!

    (0) (0)
  79. Avatar

    Jacqueline Sanders (verified owner)

    nzWellington, New Zealand

    Synergy rocks. As usual, product arrived in 24 hours and was exactly what I ordered

    (0) (0)
  80. Avatar

    Leonie (verified owner)

    nzNew Zealand

    An absolute game changer…wouldn’t use anything else now. Brings my foiled blonde hair back to life so it is now soft and shiny.

    (0)