BestsellerK18 Leave-In Molecular Repair Hair Mask – 50 ml
The 4-minute leave-in treatment to reverse hair damage.
- Repairs damage from bleach + color, chemical services and heat
- Restores strength, softness, smoothness and bounce
- Works in 4 minutes, no rinsing, no extra steps
- Full size 50 ml · vegan, color-safe, cruelty-free
with tracking
24 hours
money-back
1. Shampoo, do not condition. Towel-dry thoroughly.
2. Apply 1–3 pumps based on length and density, starting at the ends and working up towards the roots.
3. Let sit for 4 minutes. Do not rinse out.
4. Comb, add styling product and style as usual. Use for 4–6 washes, then as needed.
Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, sh-Oligopeptide-78, Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol, Amyl Salicylate, Benzaldehyde.
Free shipping on every order. Orders ship within 24 hours, with tracking.
Not satisfied? Contact our support team for an easy refund. We just ask that you give the product at least a 2-week try.
soft, strong, bouncy hair for everyone
Whatever broke your hair, K18 works at the molecular level to repair it.
bleach + color
heat styling
chemical services
repair that won't wash away.
K18PEPTIDE™ is a biotech-developed peptide that mimics hair's own structure. It clicks into the keratin, the source of hair's core strength, and reconnects the polypeptide chains and disulfide bonds broken by bleach, color, chemical services and heat.
The result: soft, shiny, bouncy hair from the first use, with repair that lasts past your next wash.
Repair my hair
see it to believe it
Most people see results after 2–3 uses. The more damaged the hair, the more dramatic the change.
Before/after photos and reviews from verified K18 customers, published on k18hair.com.
why the k18 mask is different
Not a conditioner, not a coating: a treatment that repairs hair from the inside.
repair goes further
Reconnects polypeptide chains and disulfide bonds for strength along the length and width of the hair.
even extreme damage
Works at the innermost layer of hair to renew core strength and elasticity.
immediate + lasting
Hair is repaired from the first use, and results last past your next wash.
every hair type
Straight, wavy, curly, coily, fine or thick: it works where all hair is the same.
4 minutes. no rinse.
- 1Shampoo, skip conditionerConditioner leaves a film that blocks the peptide. Towel-dry thoroughly.
- 2Apply 1–3 pumpsStart at the ends and work up towards the roots, based on length and density.
- 3Wait 4 minutesDo not rinse out. The peptide gets to work inside the hair.
- 4Style as usualComb and add any styling product. Use for 4–6 washes, then as needed.
dos and don'ts
do
- Apply on clean, damp hair
- Wait the full 4 minutes before combing or styling
- Add whatever styling products you love after 4 minutes
- Use for 4–6 shampoos in a row for progressive results
- Clarify first if you use a lot of styling products
don't
- Use conditioner before applying the mask
- Overdo it: less is more
- Rinse it out
k18 vs. a regular hair mask
Why one bottle replaces your whole repair routine.
| K18 Mask | Regular mask |
|---|
love your hair, or get your money back.
If for whatever reason you're not satisfied, contact our friendly support team for a quick, easy refund.
We just ask that you give the mask at least a 2-week try, so it has 4–6 washes to work.
Try it risk-free
got questions?
