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Professional Molecular Repair Hair Mask 150mL
Professional Molecular Repair Mask 150 mL (WHOLESALE)
Before and after using k18 professional leave in hair mask and professional hair mist.
Before and after using k18 professional leave in hair mask and professional hair mist.
Before and after using k18 professional leave in hair mask and professional hair mist.
Before and after using k18 professional leave in hair mask and professional hair mist.
Professional Molecular Repair Mask pump gif 150 mL
Curly hair before using K18 mask and curly hair after using K18 mask.
strong, resilient hair at every step
Feel what's possible with K18REPAIR™
tile bestseller | color: black
4.9
Rated 4.9 out of 5 stars
1,996 Reviews

professional molecular repair mask

Second step of K18REPAIR™ service reverses damage post-service

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Description

Made to be used as part of the K18REPAIR™ service (K18 PRO mist + K18 PRO mask)

This leave-in treatment mask repairs hair damage and restores hair to a healthy state after salon services. Powered by the K18PEPTIDE™ to reconnect broken polypeptide chains and disulfide bonds to renew strength and elasticity in just 4 minutes. This mask is clinically proven to repair damage from bleach* + color*, chemical services*, and heat* for immediate + lasting results. Cream-based format helps soften, smooth, and condition hair.

*Disclaimers

Repairs Damage Caused By

  • Bleach + Color
  • Heat
  • Chemical Services

The K18 professional molecular repair hair mask is meant to be used as the second part of the K18REPAIR™ service.

With a color or chemical service:

  1. Before the service, apply K18 professional molecular repair hair mist. Wait 4 minutes. Do not rinse out.
  2. Apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, starting at the ends and working up towards the roots. Let sit for 4 minutes. Do not rinse out.
  3. Proceed with cut or style as usual.
  4. If toning, use K18 PRO mist first, wait 4 minutes, then apply toner directly over PRO mist. Process as usual. Rinse or shampoo toner + apply K18 PRO mask per instructions above.

Without a chemical service:

  1. Shampoo, do not condition. Towel-dry thoroughly
  2. Apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, starting at the ends and working up towards the roots.
  3. Let sit for 4 minutes. Do not rinse out.
  4. Proceed with cut or style as usual.

Takes damage repair further – biomimetic peptide seamlessly fits in and reconnects 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 repair

Restores hair before and after color and chemical services 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

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 and with every service

Clinically proven to reverse hair damage – from: bleach* + color*, chemical services*, and heat*

*Disclaimers

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

  • pH-optimized (5.0-6.0) to help minimize cuticle swelling + put hair proteins in their most resilient state after salon service or shampoo

  • Cream format enables easy, lightweight application across all hair types, with detangling and softening benefits.

  • Vegan, color-safe, cruelty-free

*Disclaimers

  • DO clarify before K18 if your client is a heavy product user (demineralize for mineral + metal buildup)
  • DO apply on clean, damp hair (think about 65% wet)
  • DO wait the full 4 minutes before combing or styling
  • DO add whatever styling products you love after the 4 minutes
  • 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

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.

pairs well with
bestseller
professional molecular repair mist 300mL
5.0
Rated 5.0 out of 5 stars
168 Reviews
First step of K18REPAIR™ service restores up to 99% elasticity pre-service Log In / REGISTER

Description

Made to be used as part of the K18REPAIR™ service (K18 PRO mist + K18 PRO mask)

This leave-in treatment mask repairs hair damage and restores hair to a healthy state after salon services. Powered by the K18PEPTIDE™ to reconnect broken polypeptide chains and disulfide bonds to renew strength and elasticity in just 4 minutes. This mask is clinically proven to repair damage from bleach* + color*, chemical services*, and heat* for immediate + lasting results. Cream-based format helps soften, smooth, and condition hair.

*Disclaimers

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K18 is engineered to work with every hair type, in every service, and with every routine.
Traditional conditioners leave a film on hair 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 styling product.
Water in damp hair swells the cuticle (the outside layer of hair) to open the gates for our biomimetic peptide to enter and travel to the innermost layers of hair. If the gates aren’t open, the product will stay on the surface—giving you mostly superficial repair. By applying on damp hair, you can use less, waste less, and still get the best results.
Think of the K18 mask as a highly concentrated treatment. It restores hair’s strength + elasticity in the innermost layers of hair, instead of traditional conditioners that coat the outside of hair. After the 4-minute wait time post-K18 mask, feel free to add a leave-in for a boost of conditioning if needed.
Yes, both formulas are the same. The PRO mask is conveniently sized for PRO use.
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.

learn more on our blog
feel what's possible with K18
See how K18 unlocks our community's expression
4.9
Rated 4.9 out of 5 stars
Based on 1,996 reviews
1,996 reviews
  • Esther Y.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 35 - 44
    Hair Concern Chemical damage, Fragile/brittle hair, Color-care, Dryness
    Rated 5 out of 5 stars
    1 week ago
    Hair repair

    My bleached hair was so brittle and dry. K18 hair mask saved it after 2-3 uses

    K18Hair PRO
    2 hours ago

    It's amazing how quickly it can work its magic on damaged hair. Thanks for the amazing 5-star review!

  • Hailey B.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 25 - 34
    Hair Concern Heat damage, Color-care, Split-Ends, Dryness
    Hair Type Medium Density
    My Results Smoother Hair, Soft Touchable Hair, Shinier Hair, Less Breakage, Visible Difference
    Rated 5 out of 5 stars
    2 weeks ago
    I love this stuff!

    I have been using this for years and will forever keep using it. I recommend to everyone!

    K18Hair PRO
    1 week ago

    Your loyalty and recommendation to everyone means the world to us. Thanks for the amazing review!

  • Delilah P.
    Verified Reviewer
    Reviewing
    Professional Molecular Repair Mask 150 mL (WHOLESALE)
    I recommend this product
    Age 45 - 54
    Client Hair Concerns Chemical Damage, Split Ends, Dryness, Heat Damage, Frizz
    Client Hair Types Fine/Thin, Grey Hair, Curly/Coily, Thick/Coarse, Straight/Wavy
    Client Results Less Frizz, Bouncy Hair, Visible Difference, Stronger hair, Less Breakage
    Rated 5 out of 5 stars
    1 month ago
    The best restorative medicine for hair! The leave in mask

    I’m in love with the line K18 , as a professional hair stylist I’ve tried many different types of treatments and this one for me is a winner! I’m all about theory /certification to really understand the main core principles/use of a product.

    Hair feels silky, clean and healthy! Highly recommend K18 to keep that crown shiny.

    K18Hair PRO
    1 month ago

    Delilah, we're absolutely thrilled to hear from a professional hair stylist who truly understands the science behind K18! It means the world to us that after trying so many different treatments, K18 stands out as a winner for you.

  • Denise B.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 55 - 64
    Hair Concern Chemical damage, Frizz, Dryness, Extending time between washes
    Hair Type Grey Hair, Straight/Wavy, Medium Density
    My Results Less Frizz, Visible Difference, Stronger Hair, Smoother Hair, Shinier Hair
    Rated 5 out of 5 stars
    1 month ago
    Magic in a bottle

    This product has transformed my hair!

    Why did it take me 60 years to discover it??

    K18Hair PRO
    1 month ago

    Thank you so much for this amazing review, Denise! Your hair is beautiful! We love that you're experiencing the magic and appreciate you taking the time to share your wonderful experience!

  • Niav H.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 35 - 44
    Hair Concern Extending time between washes, Fragile/brittle hair, Color-care
    Hair Type Fine/Thin, Straight/Wavy
    My Results Soft Touchable Hair, Cleaner, fresher hair, Bouncy Hair, Visible Difference, Oil absorbed
    Rated 5 out of 5 stars
    3 months ago
    Love this product

    I have been loving using this product. It works as advertised. 4 pumps after shampooing only. My hair is in better shape after several weeks of using

    K18Hair PRO
    3 months ago

    We’re so happy K18 is bringing your hair back to life, thank you for trusting us with your strands!

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