Free UK shipping over £25 15% off your app order Sign up for email exclusives Earn Cult Status Points
Get up to 15% OFF your first haul with code FIRST15
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 clearpay


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:

£69.00

Other Customers Bought

Customer Reviews

4.56 stars out of a maximum of 5

5 stars rating 886 reviews

4 stars rating 230 reviews

3 stars rating 81 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.

K18

5 stars out of a maximum of 5

This is the most amazing hair product I’ve ever used! Difference was noticeable after first use. Hair shiny, smoothed frizz and so healthy. I bought a 9ml that did 2 washes then purchased the 50ml . Used for 6 consecutive washes , I only wash my hair every  3-4 days. Now I’m using on every 3rd wash so will go long way. 

by Michelle Verified Purchase

Was this helpful?

Not that good

1 stars out of a maximum of 5

Did nothing for my hair olaplex is better

by Tom Verified Purchase

Was this helpful?

Must have!!

5 stars out of a maximum of 5

I love this product, it definitely keeps my naturally wavy and fly away hair calmer. I use this in between Brazilian blow dry treatments, as my hair looks healthier for it and is much more manageable 

by Laura Verified Purchase

Was this helpful?

Not Bad

3 stars out of a maximum of 5

I've used this 3 different ways now and I'm just not sure if I've just not used it the right way enough or if its just not working for me. Either way I have finished the bottle and my fine hair just didn't get the real pick me up I thought it would with this product.

by Caitie Verified Purchase

Was this helpful?

Terrible for my hair

1 stars out of a maximum of 5

I'm not sure why as obviously works for some people but made my hair so frizzy and dry. Used for 4 washes but then stopped. My results with Olaplex is much better

by Faye Verified Purchase

Was this helpful?

Big disappointment

1 stars out of a maximum of 5

I had such high hopes but this did absolutely nothing for me. I have long blonde, highlighted hair that’s pretty much straight. My biggest concern is breakage and frazzled ends. This left my hair feeling SO dry, despite applying a generous amount given the length of my hair and damage. Olaplex works miles better for me and is a lot less expensive.

by Octavia Verified Purchase

Was this helpful?

Not what I expected

1 stars out of a maximum of 5

Did nothing to impress me, Hair was lank, lifeless, and felt very course. 

by Jeannette Verified Purchase

Was this helpful?

I like it

5 stars out of a maximum of 5

I used it once and i love the results. review is based on my first use , i still have to see how will be in the future after a few uses( if is something temporary or not) However after the first use i am very happy amazing product! Love it

by Frida Verified Purchase

Was this helpful?

Phenomanal

5 stars out of a maximum of 5

I have a full head of bleach and have had for over 15 years. Yeah it’s high maintenance and at the min my hair is tired  dry and dull. After doing much research I came across this little beauty and I have to say I have used it once and Oh My Word! This is amazing my hair felt lies brittle and tangly and absolutely amazing. It blow dried really nice and smooth.  Mentioned to to my hairdresser and she said it’s amazing isn’t it better than olaplex… now that is a big statement but I have to say I agree.  I’m going to use this twice a week as my hairdresser suggests.  But I would highly recommend this product  to anyone especially with a full head of bleached hair.  Expensive ..yes but I would say it’s worth every penny! 

by Suzanne Verified Purchase

Was this helpful?

Game changer

5 stars out of a maximum of 5

This - used with the spray mist as a salon treatment, has been a game changer for me. For some years I have experienced significant hair loss - illness & menopause related. After a single application of K18 I noted immediate reduction in hair loss which, after continued use of K18, has decreased to almost nothing /negligible. My hair feels stronger, thicker and styles better when using the products.

by Elaine Verified Purchase

Was this helpful?