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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?
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.
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.
- K18 Biomimetic Hairscience
Frequently Bought Together



from £51.00
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K18 Leave-in Molecular Repair Hair Mask (Various Sizes)
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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?
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.
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.
- K18 Biomimetic Hairscience
Frequently Bought Together



from £51.00
Add both to basket
Customer Reviews
Top Customer Reviews
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Game changer for colour treated hair!!
I really love how soft and shiny this leaves my hair. I lighten my hair very often and find this product helps stop the brittle feeling and breakage. Definitely worth the splurge!!
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Good product
Does what it says. See the results after longer period of use and with regular hair deep cleansing
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Love it
This is my second purchase of K18 and I it has help improve my hair texture and appearance.
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Total convert - liquid gold
This stuff is liquid gold for my double bleach processed hair. Don’t think I can ever stop using this. Little goes a long way. One of these lasts me about 7 months on shoulder length hair using twice a month.
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Must buy
K18 is available on limited sites and getting it from cult beauty is a plus as there are other items worth buying from cult beauty and with earned points can get advantage as well
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Does the job but hate the price
Very expensive for the amount you get but it leaves a very silky feeling in the hair
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Pricy but it does the job
Really loved this product. Not the price though. Will keep using it until I run out and see if I buy it again
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Great mask
I only use two pumps after showering towel dried hair I then wait 4 minutes and use other products for hydration Great hair repsir results should come in a few weeks, does not instantly make my hair look great so I will await to see results with time
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Such soft hair
I've been using this mask for a week now (every day washing my hair) and it's helped so much with the condition of my hair. It's softer and feels much healthier. It's very expensive but if your hair is very damaged I would 100% recommend this treatment.
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Worth it!
I've definitely noticed a change in my hair since using this. My hair feels smooth after use (I was concerned about no conditioner as I'm a coily haired girl but no problems here). My hair has been stronger with less hair fall and less hair in the brush and my curls and coils are being restored to their old beauty after years of heat damage. This is so worth the price in my opinion.
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