LEAVE-IN MOLECULAR REPAIR HAIR MASK
Repair damage at the molecular level with K18PEPTIDE™.
your healthiest hair starts here
this is hairscience that sees you. not overwhelms you.
HERE’S WHY
backed by K18-patented biotech
Explore the Science Shop the featured collection
Experience deeper, lasting repair at the molecular level- where all hair is the same.
real people, real results
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before
after
"Amazing the way it feels and the shine it provides to the hair instantly."
- Sandra M.
before
after
"I’ve been using this mask for about four washes so far. I feel that my hair is getting healthier."
- Olga S.
before
after
“…I had my hair chopped (it was begging for it) along with some highlights and coloring of the roots. My hair stylist used this on my hair and I absolutely loved how it made my hair feel"
- Christina Marie P.
before
after
"It makes my hair so soft and weightless, I absolutely love it. Most other products leave my hair greasy and I can’t even style it, and right after washing I have to put it in the bun. It’s a nightmare! But not with K18. It makes my hair feel so luxurious, it’s like I just left the salon."
- Anastasiia T.
before
after
"My hair has been a mess for years... My new hair stylist recommended K18! ... My hair looks and feels amazing with lasting results!!"
- Arnell M.
before
after
"My hair was thin and unhealthy after years of highlights . After a few months of using the leave in mask, my hair is healthy and so much fuller."
- Melissa K.
before
after
"I recently heavily highlighted my hair to match the salt and pepper I started growing out months prior. The first time I washed my hair it was so dry and damaged looking. The next wash was using K18 and the difference was evident! My hair looks healthy and silky again."
- Mandy R.
before
after
"Hair was so dry and like straw before using, and it is now so much softer, silkier and smoother."
- Angelo A.
Testimonials and before/after images reproduced from the official K18Hair website; results vary. Snapshot: November 12, 2026.
