(8464 Reviews)

leave-in molecular repair hair mask

leave-in molecular repair hair mask

$75.00
$75.00 $85.00
SAVE 11% Sold out

Revolutionary dry shampoo for a fresh hair + scalp—even after your toughest workout

A leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes. The K18PEPTIDE™ is clinically proven to repair damage from bleach + color, chemical services and heat* – with immediate and lasting results to restore strength, softness, smoothness and bounce to hair.

Bleach + Color

Heat

Chemical Services

BUNDLE & SAVE

leave-in molecular repair hair mask

leave-in molecular repair hair mask

$75.00
$75.00 $85.00
SAVE 11% Sold out

how to use

  1. Shampoo, do not condition. Towel-dry thoroughly.
  2. Apply 1-3 pumps of K18 leave-in molecular repair hair mask based on your 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 product + style as usual. Use for 4-6 washes post-salon service, then as needed.

more to know

  • K18PEPTIDE™ is a biotech-developed peptide that mimics hair's structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during bleaching, color and chemical services + heat*.
  • pH-optimized (5.0-6.0) to help minimize cuticle swelling + put hair proteins in their most resilient state.
  • Cream format enables easy, lightweight application across all hair types, with detangling and softening benefits.
  • Vegan, color-safe, cruelty-free.

key benefits

Takes damage repair further – reconnects both polypeptide chains (and as a result, also reconnects disulfide bonds) for strength along the length + width of the hair - offering comprehensive, lasting damage repair.

Restores hair from even extreme damage - by working at the innermost layer of the hair, core strength and elasticity are renewed for strong, smooth, bouncy hair.

Delivers immediate and lasting results – hair is repaired from the first use and lasts past your next wash, for ongoing reparative benefits.

Simplified repair - convenient, leave-in formula works in just 4 minutes, with no extra rinse required.

Works on all hair types – because K18PEPTIDE™ works on a molecular level (where all hair is the same), this product is effective on all hair types.

dos and don'ts

✔ DO clarify before K18 if you’re a heavy product user (demineralize for mineral + metal buildup).

✔ DO apply on clean, damp hair.

✔ DO wait the full 4 minutes before combing or styling.

✔ DO add whatever styling products you love after the 4 minutes.

✔ DO use for 4-6 shampoos consecutively for progressive results.

❌ DON'T use conditioner before applying K18 Mask (you can apply after the 4 min but most find they don’t need it).

❌ DON'T overdo it—less is more.

❌ DON'T rinse it out.

ingredients

Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20,sh-Oligopeptide-78 (K18PEPTIDE™), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol.

View full details

soft, strong, bouncy hair for everyone

Repair damage for hair like new* in 4 minutes.

Before and after comparison

"l absolutely love this product!! You have to see it to believe it!""-Christina Marie P

Before

After

 
 
 

powered by K18PEPTIDE™

Biomimetic peptide clicks into hair’s keratin structure—the source of core strength—for soft, shiny, bouncy results that won’t wash away.

          4-Minute Molecular Repair for Stronger, Smoother Hair

          Takes damage repair further – reconnects both polypeptide chains (and as a result, also reconnects disulfide bonds) for strength along the length + width of the hair - offering comprehensive, lasting damage repair.

          Restores hair from even extreme damage - by working at the innermost layer of the hair, core strength and elasticity are renewed for strong, smooth, bouncy hair.

          Delivers immediate and lasting results – hair is repaired from the first use and lasts past your next wash, for ongoing reparative benefits.

          Simplified repair - convenient, leave-in formula works in just 4 minutes, with no extra rinse required.

          Works on all hair types – because K18PEPTIDE™ works on a molecular level (where all hair is the same), this product is effective on all hair types.

          how to use molecular repair mask

          1. Shampoo, do not condition. Towel-dry thoroughly.

          2. Apply 1-3 pumps based on your 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 + style as usual. Use for 4-6 washes, then as needed.


          *k18hair.com/disclaimers

          learn more on our blog

          • How much leave-in mask do you *really* need?

            Find your optimal dose with this easy guide.

          • The Science Behind K18 Molecular Repair

            See how our K18PEPTIDE™-powered mask reverses damage in 4 minutes for lasting + progressive hair health.

          • the top k18 mask faqs

            answering your most-asked questions.

            feel what's possible with K18

              got questions?

              how does the k18 mask work?

              The K18 mask works as a treatment to reverse damage in 4 minutes. It’s powered by our biomimeticK18PEPTIDE™to seamlessly fit in and reconnect broken polypeptide chains at the molecular level. As a result, disulfide bonds are also reconnected for reinforced strength along the length + width of hair—offering comprehensive, lasting, and progressive repair.

              what is the k18peptide™?

              K18PEPTIDE™is a biotech-developed peptide that mimics hair’s structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during damage from bleach + color, chemical services, and heat*
              *Disclaimers

              why skip conditioner?

              Conditioner leaves a film that blocks our peptide from penetrating effectively. Once the 4-minute wait time is up, feel free to use a conditioner, a leave-in, or any type of product.

              i noticed there’s alcohol in the formula, isn’t that bad for you?

              We like to keep our formulas minimal, only using the exact amount of ingredients needed to get the peptide where it needs to go. Here the alcohol serves as an agent to optimize the hair environment for the K18 mask to work on a deeper level. Our unique blend of 3 alcohols functions to open the hair cuticle so theK18PEPTIDE™can penetrate the innermost layer of hair, reaching the broken polypeptide chains (keratin chains)

              when should i expect to see results?

              Most see results after 2-3 uses. The more damaged the hair, the more dramatic the results so it may vary depending on your hair type and level of damage.

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