K18 Biomimetic Hairscience Leave-in Molecular Repair Hair Mask 15ml
You'll earn 30 Status Points with this product
£30.00
Or 4 interest free payments of £7.50 with
In stock | Usually dispatched within 24 hours
Where science meets hair care, K18 believe that to truly care for our tresses, we must understand the biology behind it. Swapping out the lab coat and test tubes for a salon chair and hair tools, this brand is here to help you transform your locks from the comfort of your bathroom! Packed with a plethora of beneficial ingredients, namely their uniquely patented K18Peptide™, their hero product is a game-changer - or should we say mane-changer - that promotes healthier-looking hair. Can't think of a way to restore your hair's elasticity and bounce? Cue: the Leave-In Molecular Repair Hair Mask...
Does your hair need some TLC and a little... shaping? To the salon! Treat your locks to this at-home, leave-in formula that's infused with their unique patented K18Peptide that works on molecular level to repair even the most extreme damage! Let's pop on our lab coats for a quick second and give you the science-y low-down on this Leave-In Molecular Repair Mask. The patented peptide boasts a unique sequence of amino acids through the struggling strands to reconnect. The result? Stronger, softer, smoother and bouncier hair that's full of life. Boasting salon-like results in just 4 minutes, this concentrated formula is brimming with moisture magnets and protectors to leave your hair feeling prepped, primed and voluminous. Did someone say luscious locks alert?
Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, sh-Oligopeptide-78, Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol.
For the latest information, it is recommended to review the ingredient list printed on the packaging of the product prior to usage or consumption.
Shampoo and rinse. Do not use conditioner, towel dry hair thoroughly, apply Leave-In Molecular Repair Mask and wait 4 minutes. Do not rinse out. After 4 minutes, apply styling products if desired and dry/style as usual.
Frequently Bought Together

This item
K18 Biomimetic Hairscience Leave-in Molecular Repair Hair Mask 15ml
£30.00
Customer Reviews
5 stars rating 938 reviews
4 stars rating 246 reviews
3 stars rating 84 reviews
2 stars rating 25 reviews
1 stars rating 21 reviews
Top Customer Reviews
Thanks for sharing your thoughts! Please remember that results will vary from person to person. We're proud to say that all customer reviews are independent, authentic and do not represent the views of Cult Beauty or The Hut Group.
Meh ...
After hearing all the hype, I took the plunge and decided to purchase it despite it being so expensive. I use Olaplex, Virtue hair mask, Philip Kingsley, etc. and invest a lot in hair care. This actually made my hair look dull and matte after using it the first time. I followed the directions and persevered, using it 4-6 washes as suggested, but it just made my hair look worse. I couldn't wait to go back to my usual products and get the shine back in my hair. I think if you have severely damaged hair, this might work for you. But if you already have healthy hair, then it probably won't do much. It made my hair feel stronger and softer, but I didn't like it looking so dull and matte. Especially for how expensive it is, I'd rather my hair feel softer, stronger, and shinier.
by ESH Verified Purchase
Was this helpful?
Excellent product although expensive
This product is amazing, but it is very expensive (hence why I didn't give it full stars). Moreover, I find the price here is higher then when I buy it locally.
by Silvana Verified Purchase
Was this helpful?
Wanted to love…
For the cost of this product, I wanted to love it. There’s no doubt it repairs your hair and leaves it very soft and nourished. But, for my fine, curly hair leaves it way too soft to hold the curl. I’d probably use it when it’s due a cut and getting tangly but wouldn’t repurchase.
by Rachel Verified Purchase
Was this helpful?
Amazing
I can really see a difference with my hair when I use this product, a little goes a long way! My hair feels smooth and hydrated
by Abigail Verified Purchase
Was this helpful?
The best
This will always be in my hair routine - it’s saved my overprocessed hair. A little goes a long way and leaves hair feeling amazing once styled
by Elaine Verified Purchase
Was this helpful?
Worth the price
Absolutely the BEST hair mask I have ever used! Leaves your hair so soft and hydrated, especially as someone who has bleached hair!
by dannielle Verified Purchase
Was this helpful?
Amazing
This has completely transformed my hair & is a staple in my hair growth journey
by Lauren Verified Purchase
Was this helpful?
In love
I have damaged hair from highlights and was recommended this by hairdresser. My hair now looks so healthy will definitely buy again There is a reason it's expensive...... it actually works
by susan Verified Purchase
Was this helpful?
Best hair mask ever
I have coloured hair and this mask saves it after applying for 5-6 times. It contained protein peptides and helps to rebuild the structure of your hair to original state. Even though it might look expensive, I purchase 15 ml that actually last me for 3 months (I use it once in a week)
by Tatiana Verified Purchase
Was this helpful?
Not sure what the hype is about
I kept seeing this on tik tok and thought it looked amazing. I have fine very curly hair and can’t say I really noticed a difference. You can’t use conditioner when you use it which basically means it’s a no for me!
by CJ Verified Purchase
Was this helpful?