Free UK shipping over £25 15% off your app order Sign up for email exclusives Earn Cult Status Points
Get The Tiny Treasures Goody Bag (worth over £260) FREE when you spend £165
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

4.53

1076

5

4

3

2

1

759

194

78

25

20

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.

Truly transformative!

Amazing product to totally change the dry texture of hair. Expensive but worth it

by Ellen Verified Purchase

Was this helpful?

Not sure yet

The bottle is very small and after a few washes it made my hair feel a bit softer. Olaplex better

by Jade Verified Purchase

Was this helpful?

Magic in a bottle!

This product is very expensive but in my opinion worth every penny. I have been using the k-18 leave in hair mask for a couple of years now, and it has transformed the health and texture of my hair! My hair is bleached and this keeps it looking healthy and soft, and reduces split ends and breakage. It’s also really easy to use, and unlike most bond repair products can be used after washing your hair (pre conditioner), and only takes 4 min to work. This means I am far more likely to consistently use this compared to other similar products. Would highly recommend!

by Amber Verified Purchase

Was this helpful?

The Best for Damaged Hair

Very impressed with this mask. It makes a huge difference to my bleached and fine hair. Really helps with split ends and my hair has never been in such good condition!!

by Isabel Verified Purchase

Was this helpful?

Help for dry, damaged hair

Makes my hair feel smooth and soft.

by Kay Verified Purchase

Was this helpful?

This is the best hair mask

This is the best hair mask I've ever used. I have bright red hair which is bleached and then dyed, so it's always in pretty poor condition. This hair mask has saved my hair, it makes it feel so soft and is in much better condition than if I didn't use the mask. This is my third purchase - an absolute must for me.

by christmasjones Verified Purchase

Was this helpful?

Works on split ends

I’m very impressed with this leave in treatment, it’s probably the only product I’ve used that has actually corrected and repaired/re-bonded the split ends on my bleached hair so they’re no longer like candyfloss and that’s after only 2 applications! The improvement is dramatic and long lasting. The bottle is tiny but 3 pumps is enough for my long hair. Only negative is you can’t use conditioner prior to applying as this only works on pre shampooed hair as conditioner would stop it from absorbing and because I’m only applying to my split ends it means the rest of my hair is a bit dry from not using conditioner.

by Emma Verified Purchase

Was this helpful?

Results in one use

Impressed so far. Hair was smoother and looked less damaged after one use

by L Verified Purchase

Was this helpful?

Second bottle

Yes this is expensive but leaves my hair feeling wonderful. I’ve tried other products but they either leave my hair feeling mat or dirty like it need a wash the next day. This is great, I was sceptical about not using a conditioner but went with it the first time & loved the result. Will continue to buy although it is expensive!

by Maz Verified Purchase

Was this helpful?

This gives you goddess hair

My hair is overly processed the ends are bleached and I am currently growing out the blonde and this has turned my straw like hair into skin silk. No exaggeration this is magic. Make sure you apply this on hair after shampoo no conditioner wait the allocated time then apply your usual conditioner or leave in conditioner. It’s just wonderful. I have it in a mini size as well as the largest size so I have it when I travel.

by Sarahec Verified Purchase

Was this helpful?