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 887 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.

Fantastic product

5 stars out of a maximum of 5

I have higlighted dry hair. I have used Olaplex previously but i find this to be much better for my hair. Does not leave it dry, and the effect was immediately better. Had the salon treatment when doing the highlights and bought this from Cult after the salon visit . Could not be happier, hair looks a lot healthier, i find it les dry and easier to style. In my case, i prefer this to Olaplex. So glad i found it.

by Salome Verified Purchase

Was this helpful?

Excellent

5 stars out of a maximum of 5

Expensive but you only need the smallest amount and leaves my hair looking sleek and shiny!

by Monika Verified Purchase

Was this helpful?

Not worth the hype

1 stars out of a maximum of 5

I usually use olaplex but I thought I’d give this a go due to the hype but I was sadly disappointed. Tbh it’s no better than using a standard conditioner I definitely won’t be purchasing again. 

by Lisa Verified Purchase

Was this helpful?

not as good as

1 stars out of a maximum of 5

it thinks it is I much prefer Virtue Recovery Conditioner or Olaplex no 8, both are SO much better than this. I have fine coloured hair and this does not help at all. Makes my hair flat not conditioned!

by Suzi Verified Purchase

Was this helpful?

so far good

5 stars out of a maximum of 5

I have seen so many times adv with american hairstylist so I gave it a try. its good but expensive for the mini tiny wee package . so it better work wonders in my hair. I have used it twice and is good.

by denice Verified Purchase

Was this helpful?

Holy grail

5 stars out of a maximum of 5

This product is quite honestly a new holy grail product,I have used it 5 times in a row and it has completely transformed my hair! It feels thicker, stronger and just generally looks healthier! Don’t hesitate buy it now.

by Laura Verified Purchase

Was this helpful?

Total waste of money and ruined my hair

1 stars out of a maximum of 5

Absolutely awful; made my hair dry, brittle and frizzy and now more split ends, I contacted K18 who confirmed I used it correctly: clarifying shampoo first. I used it three times but the damage is now apparent when before it was much shinier, softer. I’ll stick with olaplex and 8 second miracle water! I wish I wasn’t sucked in by the hype, so expensive too

by Katherine Verified Purchase

Was this helpful?

Ok, I get the hype

5 stars out of a maximum of 5

This stuff is brilliant! I usually have a Brazilian blow dry (also know as a keratin BD) but this is close to wearing out as my frizz has returned in recent weeks. I’ve used this once and saw an immediate improvement in the taming of my hair. Less fly aways, means I need less other products too. I can’t wait to use it repeatedly as it says you should.

by Laura Verified Purchase

Was this helpful?

First time use

3 stars out of a maximum of 5

I recently purchased this is the hopes to start looking after my hair. I’m 30 with fine, blonde, long hair, I’ve always coloured it, though always avoided bleach. I’ve never took care of my hair in the past, and only the past few months started using heat protection! I rarely straighten, but this last year I have been using my wavers often on the maximum heat! This is when my hair started to change for the worse, and it became knotty daily, dry, brittle and straw like. I’ve used this for around 3 weeks, and completely cut out conditioner. I was really disappointed as the first time I used this I was expecting a miricle though my hair felt the same, if not worse. (Although it didn’t feel as bad as just shampoo alone) I’ve now used this around 5 times in total, and my hair does feel healthier. It feels stronger and doesn’t get greasy! I am washing once a week atm instead of the the every other day I used to prior to using this, and I’m only needing to use dry shampoo once around the time it’s due the weekly wash. No conditioner is doing wonders for my hair, but I don’t think I could do it without using this in replacement. It’s not amazing to the point I’m blown away, but I do see improvement and I hope they keep coming. 

by Sasha Verified Purchase

Was this helpful?

K18 hair mask

5 stars out of a maximum of 5

Have used Olaplex for a while now but thought I would try this. Wow! This has transformed my hair. Will never be without it now

by Bridget Verified Purchase

Was this helpful?