SAR 138.00
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%
SAR 138.00

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K18
Leave-In Molecular Repair Hair Mask
15ml
Leave-In Molecular Repair Hair Mask
SAR 138.00
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K18 Biomimetic Hairscience
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Reviews
Recent Reviews
lalynne
Verified Buyer
5
4/29/2025
Really works!
I noticed a big difference in th condition of of hair, softer and smoother, after using it once a week for a month
Originally posted on sephora.com
pretttylady12
1
4/28/2025
Will BREAK off fine hair - use with caution
Do NOT use this product if you have thin bleached hair. I have noticed my hair get progressively weaker in the last year and now realize it is due to the K18 line and packing too much protein into my thin strands. It made my hair feel so strong and soft after first using but then tripled the amount of hair falling out in the shower. I don’t normally write reviews but I saw so many others people writing about this on reddit that I wanted to make sure I put my review on here - it broke so much of my hair off and slowly weakened my hair do NOT use if you have fine hair you will thank me later!!!
Originally posted on sephora.com