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K18 = Sephora

K18 Biomimetic Hairscience

Get hair like new* with K18's biology-first haircare, designed to make the impossible possible.

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Reviews

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4,937 Reviews

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Recent Reviews

majalikebaja

Verified Buyer

5

3/15/2026

Holy grail level for damaged hair

My hair genuinely feels stronger even after one use. I’ve tried all the trending hair products- and this is one of the two that I’ve kept as my holy grail. Take a dime size piece and add to the tips (the acidic bonding one) perrrfect duo.of your hair. Then I recommend using the redken leave in shampoo

Recommended

Originally posted on sephora.com

Lea

4

3/14/2026

Great result but very expensive

I was a bit sceptical before buying because leave-in masks aren’t usually part of my routine and I was worried about a greasy finish on my fine hair. After checking the proper application, I realised a very small amount is enough. I could already see the benefits after the first use and I’m really happy with the results. The only downside is the price, It is very high for the quantity

Originally posted on Sephora-uk

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