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    4 minutes tohair like new

    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.

    SHOP THE

4 minutes tohair like new

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.

SHOP THE

    CLINICALLY PROVEN BENEFITS

    🏆 2022 Allure Best of Beauty Award Winner

    • Patented K18PEPTIDE™
      Reverses damage from bleach, color, chemical services + heat at the molecular level.
    • Works in 4 minutes
      Fast-acting repair. Just wait 4 minutes before styling.
    • Highly concentrated formula
      A little goes a long way. Start with 1 pump and build as needed.
    • Easy leave-in, no rinse needed
      Skip the conditioner. Apply to damp hair and let the peptide do the work.
    • For all hair types
      Universal repair for fine, thick, curly, or straight hair.
    • Vegan + cruelty-free
      Clean, conscious hair science you can feel good about.

    CLINICALLY PROVEN BENEFITS

    🏆 2022 Allure Best of Beauty Award Winner

    • Optimal pH Protection

    Engineered with a $5.0-6.0$ pH range to help close the cuticle and maintain hair moisture while enhancing natural shine.

    • Color-Safe Cleansing

    Effectively removes dirt and oil without stripping away your hair's natural moisture or fading your salon color.

    • Protein Loss Prevention

    Creates a protective shield that minimizes protein loss during the washing process, keeping hair stronger over time.

    • Powered by K18PEPTIDE™

    Features our patented biotech to prep the hair for maximum repair and maintain hair health with every wash.

    • Micro-Dosed for Daily Use

    A gentle, non-sensitizing formula designed for frequent washing without build-up or irritation.

    • Vegan + Cruelty-Free

    Clean, conscious hair science you can feel good about.

    real people, real results

    see more #k18results

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

    • "Amazing the way it feels and the shineprovides to the hair instantly."- Sandra M.

    • "I've been using this mask for aboutfour washes so far. I feel that my hair isgetting healthier."- Olga S.

    • "I really like it, I was able to tint my hairagain and it looks a little more thicker."- Estefania M.

    • "I use this alllll the time. It's truly savedmy hair....And it's so gorgeous andshiny and the thickness is returningnicely."- Emma L.

    • "My hair has been a mess for years...My new hair stylist recommended K18!... My hair looks and feels amazing withlasting results!!" - Arnell M

      See the K18 difference

       
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        inspired by nature,designed for you

        Using synthetic biology + biomimetics,we solve hair concerns from the inside out.

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      feel what's possible with hair like new, powered by biotech

      Why Biotech?

      Standard hair care relies on heavy oils and silicones for a temporary "smooth" feel. We use Biotech-Driven Innovation to mimic the natural structure of healthy hair. The result? Hair that doesn't just look better—it is better.

      • Molecular Repair: Reverses damage from bleach, color, chemical services, and heat.
      • Like-New Strength: Restores elasticity, bounce, and shine from the very first use.
      • Weightless Brilliance: High-performance results without the heavy buildup.

      "Feel what's possible with hair like new, powered by biotech."

      Shop Now

      WHY BIOTECH?

      Standard hair care focuses on cleansing and protecting hair at the same time. We use Biotech-Driven Innovation to deep-cleanse and create a micro-shield against environmental damage and pH disruption. The result? Hair that isn't just clean—it's healthier and more resilient with every wash.

      • Optimal pH Maintenance: Balances hair's natural acidity to help seal the cuticle and lock in moisture for smooth, protected hair.
      • Microlayer Protection: Creates a weightless, protective shield that guards against pollution, color fade, and protein loss.
      • Non-Sensitizing Clean: Features plant-derived surfactants to effectively remove oil and grime without compromising the natural scalp and hair ecosystem.

      "Elevate your daily wash and build a foundation for healthy, strong, and clean hair with every use."

      Shop Now

      Customer reviews

      Get started here.

      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 biomimetic K18PEPTIDE™ 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 the K18PEPTIDE™ 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.