Free UK shipping over £25 15% off your app order Sign up for email exclusives Earn Cult Status Points
Enjoy 15% off with code FIRST15 and get a FREE £10 gift card when you spend over £60
K18 Biomimetic Hairscience

K18 Biomimetic Hairscience Leave-in Molecular Repair Hair Mask 15ml

You'll earn 30 Status Points with this product

Discover Cult Status

£30.00

Or 4 interest free payments of £7.50 with


In stock | Usually dispatched within 24 hours

Frequently Bought Together

K18 Biomimetic Hairscience Leave-in Molecular Repair Hair Mask 15ml

This item

K18 Biomimetic Hairscience Leave-in Molecular Repair Hair Mask 15ml

£30.00

Total Price:

£57.00

Other Customers Bought

Customer Reviews

4.57 stars out of a maximum of 5

5 stars rating 963 reviews

4 stars rating 249 reviews

3 stars rating 85 reviews

2 stars rating 26 reviews

1 stars rating 22 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.

If you use it correctly you'll realise it's worth.

5 stars out of a maximum of 5

This is the best hair repair treatment I have ever used. I'm on my 3rd bottle now and the comparison from before I started using it to now is incredible. I had candyfloss falling apart when wet bleach damaged hair and now 3 months on with only 1 hair cut in that time my hair is almost back to normal healthy hair.

by Stacey Verified Purchase

Was this helpful?

Fantastic

5 stars out of a maximum of 5

Honestly so shocked with this product makes my bleached damaged hair feel brand new again

by Emily-jayne Verified Purchase

Was this helpful?

frizzy and dry hair

2 stars out of a maximum of 5

I just dyed, with bleach, my 3b/a curly hair and thought I would try this to ensure my curls didn't suffer too much harm but it honestly did nothing for me. left my curls more frizzy and dry compared to how they look when I use other bonding products. 

by SHAFIA Verified Purchase

Was this helpful?

Great for damaged hair!

5 stars out of a maximum of 5

I love this stuff! I like that you don’t have to wait ages to rinse it out and you just leave it in. It really has made a different to the health of my hair, especially at the ends. I have quite fine hair with bleached highlights so it is not always in the best condition but this has really helped and the ends have so much more chunk to them now. My hair is so soft but not weighed down once I blow dry my hair when using this - I also have the K18 service added to my colour at the salon 

by Amy Verified Purchase

Was this helpful?

Not sure about the hype

3 stars out of a maximum of 5

I’m not sure if I’m doing something wrong but this product doesn't do any miracles for me. Yes it smoothed out my extremely frizzy dry hair, but it’s nothing that other products can’t do. I find Amika products a lot better than this. 

by Midhat Verified Purchase

Was this helpful?

Saved my hair

5 stars out of a maximum of 5

It really saved my hair after they were almost destroyed by a hairdresser. Now it's my once a week stable treatment. My thin curly hair loves it.

by ELENA Verified Purchase

Was this helpful?

Long damaged hair

5 stars out of a maximum of 5

So far so good. Definitely noticed a difference after a couple of uses.

by Agne Verified Purchase

Was this helpful?

Smooths hair

4 stars out of a maximum of 5

I have quite frizzy wavy hair and this does help to smooth it a bit and be a bit more manageable, but I'm not too sure if the results justify the price. So far I'm carrying on with it as I have trouble with hydration and frizziness of my hair and it seems to be doing something. I would recommend buying the 15ml first if you have longer hair and want to try it, that will give you three uses, you only need to use it every 4-5 washes, to better tell if it's helped your hair

by Abbie Verified Purchase

Was this helpful?

What’s the hype?

2 stars out of a maximum of 5

I had heard amazing things about this product but I don’t get it. It gives me no additional softness, shine or hair strength. 

by Emma Verified Purchase

Was this helpful?

A must try when applied correct

5 stars out of a maximum of 5

This product when used right leaves hair feeling healthy, strong and silky

by Debby Verified Purchase

Was this helpful?