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.

Good maintenance for great hair.

5 stars out of a maximum of 5

I am always up for trying a new leave-in treatment and this one has really surpassed my expectations. I've seen the hype since it launched stateside and am so pleased that I invested. My fine limp hair feels strengthened without being weighed down and I can use it a couple of times a week as a treat. My locks seem happy and so am I!

by Bessie - Cult Beauty Staff

Was this helpful?

A hair care game changer for reversing damage.

5 stars out of a maximum of 5

Clinically proven to reverse hair damage in 4 minutes...I am here for this. My bleached, coloured hair needs all the help it can get and after one use my hair felt softer, smoother and stronger. I know this sounds unbelievable but It gets even more bananas - my fine, straight, pretty boring hair had an unusual weighty bounce to it which is something I haven't experienced in a long time. The suggested usage is 4-6 consecutive washes followed by every 3-4 washes to maintain hair strength. It might be magic or the patent K-18Peptide that is reconnecting my broken keratin chains, either way this is exciting and I can't wait to see the results after continued use.

by Jodi Taylor Dunne - Cult Beauty Staff

Was this helpful?

Next-gen in Haircare

5 stars out of a maximum of 5

Welcome to your new cult obsession, the next-generation in haircare! This leave-in conditioner felt like it was working from the first time I used it. I have fine, dry, mature hair, recently ravaged by COVID and its growing through weakly at the moment. I need to strengthen that regrowth to ensure it ends up as long thicker hair in a few month's time so this really appealed to me. It's been proven to strengthen the hair core over time, I've been using it for a month so time will tell for that side. What I didn't expect from such a pumped up formula is it also leaves my somewhat depleted mop soft and brilliantly VOLUMISED. I only need a pump, for longer, curly or textured hair I'd say 2-3 max. It doesn't weight hair down. The first really new innovation I've seen in haircare since Virtue and Olaplex, dropping first, and exclusively to Cult Beauty (of course)!!

by Alexia Inge - co-founder Cult Beauty

Was this helpful?