BHD 13.750
4.3
Leave-In Molecular Repair Hair Mask
A leave-in treatment mask for all hair types that clinically reverses damage in four minutes. The K18PEPTIDE™ works to repair damage from bleach, color, chemical services, and heat, restoring strength, softness, smoothness, and bounce to hair.This mask is powered by the patented K18PEPTIDE™, which is just the right size and molecular structure to reach the innermost layers of hair and re-connect broken keratin chains responsible for hair's strength and elasticity.
Restores strength, softness, smoothness, and bounce
Repairs damaged hair
Easy leave-in formula delivers lasting results
Clinical Results:
In a clinical study on hair that was bleached 8 times, after 2 uses:
-Biotech-powered K18PEPTIDE™ restored damaged hair by up to 82%
BHD 13.750
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K18
Leave-In Molecular Repair Hair Mask
BHD 13.750
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K18 Biomimetic Hairscience
Get hair like new* with K18's biology-first haircare, designed to make the impossible possible.
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Reviews
Recent Reviews
Catherine
5
7/25/2026
A must for bleached hair
My hairdressers recommended this to me after having my hair bleached. I always use in for a week after having hair bleached and then about once a month for maintenance. Couldn’t be without it!
Originally posted on Sephora-uk
Maddie
4
7/25/2026
Helped my damaged curly hair
I recently bleached my hair for the first time and it went from silky smooth and super healthy to dry and brittle. I naturally have curly hair and unfortunately these curls were lost! My hair was a frizzy mess and I had ZERO idea how to get back the healthy curls I missed. I bought this after reading reviews and oh my, my curls are back! I haven’t used this product for an awfully long time but it has done a better job than the cheaper hair masks I have previously used. I know my hair won’t get back its original silkiness for a while but this is definitely a step closer.
Originally posted on Sephora-uk