Description
Who’s it For?
All Hair Types
Introduction
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. Traveling deeper into the inner layers of hair than traditional repair products, this revolutionary patented K18Peptide™ is just the right size and makeup to fit in and reconnect broken keratin chains, renewing hair with strength, softness, smoothness, and bounce. You can feel and see the difference with the first use.
- Clinically proven to reverse damage in just 4 minutes.
- Heals damage from bleach, colour, chemical services, and heat
- Restores strength, softness, smoothness, and bounce
- Doesn’t wash away with shampoo, leaving lasting results
- Vegan, colour-safe, cruelty-free
- 91% original strength*
- 94% original elasticity*
- * Results observed in a clinical study while using mist and mask as part of a bleaching treatment. Results may vary depending on hair type, quality and history.
Repairs damage caused by:
- Bleach and Colour
- Chemical Services
- Heat
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.
BeautyFeatures Style Guide:
- 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!
More Info
- Vegan
FAQ
Q: How often should I use the K18 Leave-In Molecular Repair Hair Mask?
A:For best results, use for the first 4-6 consecutive washes, then every 3-4 washes as needed to maintain hair strength.
Frequently Asked Questions
What makes the K18 Leave-In Molecular Repair Hair Mask different from traditional hair masks?
Can I use the K18 Mask on color-treated or chemically processed hair?
How often should I use the K18 Leave-In Molecular Repair Hair Mask?
Is the K18 Mask suitable for all hair types?
Can I apply other hair products after using the K18 Mask?
Do I need to use a conditioner after applying the K18 Mask?
Is the K18 Mask vegan and cruelty-free?
How does the K18 Mask work in just 4 minutes?
Can I use the K18 Mask on extensions?
Will the K18 Mask weigh my hair down?
Ingredients
Shipping And Returns
in Ireland and Northern Ireland
- NEXT DAY DELIVERY IRELAND
- SMS and Email Alerts
- Order before 2pm for same day dispatch
- 98% of all orders are delivered next working day
Your order will leave our warehouse in Bray, Co Wicklow and be delivered the next working day. You will receive SMS & email tracking updates from the courier and someone will need to sign for the parcel on delivery.
- For full Delivery Terms visit our Delivery Page
- For hassle free returns visit our Returns Section
Product Reviews
45 Reviews
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YES! For hair repair YES!
This is really good product. I have fine curly hair and this is the most nourishing product without weighing the hair down. My hair has felt and looked really healthy since using this. Worth the price tag for sure!
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Fab product
Fabulous! Have ordered larger size aa love it so much. Leaves hair soft and shiny and tangle free
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Really see a difference in
Really see a difference in my hair since using k18
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Great treatment to tone damaged hair
My sister destroyed her hair with a harsh hair dye. Her ends were split and dry and I bought this product after reading the usage. It worked wonders after she used it twice is a row only.
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Saved my hair
This is a really good leave in. My hair is fine and curly and it was desperate for some help but I tried so many products, none with a lasting impact on the hair. Until this, this is it!! After only the first use my hair was noticeably shiny and soft. I will buy this over and over! Very small tube but it goes a long way.
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Saved my hair
This is my second tube, it has restructured my hair completely. My hair was severely damaged and coming out in clumps due to a hairdresser mishap with bleach. This saved it. With it being so damaged at the start I was putting it in after rinsing shampoo, wait 5/6 mins then went in with a mask and followed with a conditioner. Majority of people wouldn’t need to go to that extreme but at the time with the condition of my hair I had to.
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Ok
The mask, in combination with the spray, has helped in recovery of my hair, but I am giving a star less as it tends to leave my hair very greasy to the touch.
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K18 Leave-In Mask: A Miracle Makeover for Damaged Hair
If you're wondering if K18 lives up to the hype, I'm here to say — yes, it absolutely does! This leave-in mask is like a spa day in a bottle for my hair. It tackles damage at the molecular level, and the results are unreal: softer, stronger strands that actually feel healthier after each use. It’s a no-fuss, no-rinse miracle, making it perfect for busy days or just when your hair needs some extra love. Definitely worth adding to the haircare arsenal if you're after that fresh-from-the-salon feel every day!
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It works !
Really noticeable difference in my hair after use, less breakage & broken ends, left my hair feeling smooth & shiny ! Size of bottle is obviously small, would recommend for testing out first !
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Love this product!
Definitely one I will buy again!
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Lovely treatment for hair got
Lovely treatment for hair got 6 uses out of this size in shoulder length hair which i was surprised by.
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Au top
Ce produit est juste génial il y a déjà une amélioration du cheveux après la première utilisation
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Excellent
I can’t recommend this product enough. From first use it changed my damaged hair. After several uses my hair is stronger, shinier and easier to manage. It’s so soft and I will be buying more
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Would recommend this product,this is
Would recommend this product,this is my second time buying
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K18
Great product, instant results
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I’m probably going to buy this again
It is a very tiny quantity for the price, but maybe, possibly, worth it. I may buy again at some point - it really did make my hair feel amazing and strong. Wish there was a slightly bigger version, but the tiny size lasted me like 4-5 uses.
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K18
Miracle for hair bought to try will defo buy again got 2 hair she's out of this 5ml
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Great treatment
This treatment is great and I love that this small size is available so you can try before committing to the full size bottle. Leaves my hair soft yet strong.
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Instant result
Instant result
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Great to take on trips
I take these on holidays. I hope the get the 50 ml bottles back soon.
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Necessity
I wouldn’t use anything else it’s amazing and does exactly as it’s suppose to u just need to not sue to much
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Brilliant service and arrived very
Brilliant service and arrived very quickly... The k18 is fabulous,my hair was weak and coloured and it's restored it back,can't recommend it enough
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A really great product, could
A really great product, could really feel a difference in my hair even after one wash.
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Recommend
Makes hair so soft perfect size for trying it out less breakage
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Reduced breakage
Reduced breakage and I noticed an improvement after 3 uses. I bought the 15ml size bottle to try it out first and a small bit goes a long way. I would recommend for anyone who has damaged hair from colouring.
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K18
Have only used twice but feels good after, hair gets greaser quicker I have found
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I can't recommend k18 enough.
I can't recommend k18 enough. This stuff is literally liquid gold!. I'm on my 3rd use so far and there's such a difference in my hair already. Less breakage and super soft. I love it and will definitely repurchase after I've used my 150ml size.
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I was unsure about this
I was unsure about this product due to price but this was the perfect size to try it out. Left hair soft and in great condition even after 1 use. Can't wait to see it after the recommended 6 uses.
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Great for blondes
I have bleach blond hair and K18 is amazing. Really quick and easy to use and really works
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A little goes a long way
After hearing great things about this and being recommended by my hairdresser, I decided to buy 2 of the sample sizes before committing to the full size. My hair is dyed blonde with some breakage at the ends so I was hoping this would help. I’ve been using it the last few washed as directed and I’ve seen a slight improvement. My hair definitely looks brighter and smoother. I’m unsure if it’s doing anything for my hair health but it’s still early days. I have shoulder length, fine hair and I got 4 washes out of the sample size for reference
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After only 3 uses I
After only 3 uses I can see a difference in my hair and less breakage.
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This is a brilliant product
This is a brilliant product hair is so smooth. This is my third time buying this product. It really helps repair your hair from breakages. Delivery was so quick I would really recommend this product.
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Brilliant product
Brilliant product
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Can’t be without it
Can’t be without it
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Can feel the difference after
Can feel the difference after just one use!
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Miracle product
Love the mask, hair feels amazing after it! Hair is a lot stronger, with less breakage, and shinier than ever. Conditions hair really well, without leaving it feel greasy.
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Makes such a difference to
Makes such a difference to my hair. Can notice the difference from from first use
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Very good
Hair feel stronger after only two uses. Do not need to use a lot of product at all, 1-2 pumps max.
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Donna
Bought small size and got 4 washes for shoulder length dry and frizzy hair. Can see and feel benefits already. Speedy delivery and only site I've seen small tester size
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I’ve used it 4 times
I’ve used it 4 times now and already seeing results I look forward to washing my hair now and can’t wait to see how my hair will look while I continue to use it
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This product is the best
This product is the best hair product I have ever used ... Not only is my hair like silk after using it , I don't need any product in my hair and don't need to touch a straightener either. I bought the small tester and got three washes out of it so I'm now ordering the larger one as it's worth every penny
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Very good
I've used this product twice so far and leaves hair so healthy. Expensive product but worth it
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Miracle Product
So expensive but worth every cent. Has seriously improved the condition of my hair. Far stronger and a lot less breakage.
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Stronger
Left my hair feeling stronger and less brittle, noticed it after the next wash
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