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Professional Molecular Repair Mask 150 mL (WHOLESALE)
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.
Professional Molecular Repair Mask 150 mL (WHOLESALE)
Professional Molecular Repair Mask 150 mL (WHOLESALE)
Professional Molecular Repair Mask 150 mL (WHOLESALE)
Professional Molecular Repair Mask 150 mL (WHOLESALE)
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.
Professional Molecular Repair Mask 150 mL (WHOLESALE)
Professional Molecular Repair Mask 150 mL (WHOLESALE)
Professional Molecular Repair Mask 150 mL (WHOLESALE)
4.9
Rated 4.9 out of 5 stars
2,306 Reviews
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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

    • more to know

      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

    • key benefits
      • 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

    • how to use

      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.
    • ingredients

      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.

pairs well with
professional molecular repair mist 300mL
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Professional Molecular Repair Mask 150 mL (WHOLESALE)
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.
Professional Molecular Repair Mask 150 mL (WHOLESALE)
Professional Molecular Repair Mask 150 mL (WHOLESALE)
Professional Molecular Repair Mask 150 mL (WHOLESALE)
Professional Molecular Repair Mask 150 mL (WHOLESALE)
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.
Professional Molecular Repair Mask 150 mL (WHOLESALE)
Professional Molecular Repair Mask 150 mL (WHOLESALE)
Professional Molecular Repair Mask 150 mL (WHOLESALE)
got questions?

Get started here.

who is it for?

K18 is engineered to work with every hair type, in every service, and with every routine.

why skip conditioner?

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.

does K18 mask replace conditioner?

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.

Is the K18 pro mask and take-home mask the same?

Yes, both formulas are the same. The PRO mask is conveniently sized for PRO use.

soft, strong, bouncy hair for everyone

Repair damage for hair like new* in 4 minutes.

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after
"I have fallen in LOVE with this product and i haven’t had a single client disappointed"
- Sydne S.
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after
"I was so excited to try this stuff and then when I saw results instantly I knew I was in LOVE!!!"
- Shannon O.
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"Hands down the best product I’ve used to repair damaged hair. I live by this product and my clients love it too!"
- Nicole C.
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"This product is a game changer, especially for blondes! I have seen some of the most damaged hair become like new again! It’s a miracle! Ty K18!"
- Lacey P.
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"I absolutely love this product on my clients and myself!!! As a hairdresser, I’ve tried all those bond builders and what not and yes they are great but what sets k-18 apart from these other bond builders is that the technology behind it really goes deep into the hair. I have had many of my clients who had so many compliments about how healthy their hair looks and feels."
- Justina M.
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"This stuff stomps the yard! I cannot even fathom coloring or lightening hair, without K18. It’s in my prices and no one complains because their hair feels and looks amazing. The client below tried at home lightening and came in to have it fixed."
- Ryan H.
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"I’m currently in cosmetology school so of course all my family and friends want me to do their hair! Ive started using K18 on anyone i have to bleach and its like a little miracle!"
- Nicole M.
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.

Explore the Science EXPLORE THE SCIENCE
see K18REPAIR™ in action
lightener / color
1. Section dry hair into 4 quadrants.

2. Apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, or level of damage.

3. Wait 4 minutes (do not rinse out).

4. If needed, dry the hair prior to applying lightener or color. Then perform your desired technique.

5. Process your lightener or color as usual, then rinse and shampoo with K18 PEPTIDE PREP™ detox shampoo. Do not condition.

6. 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.

7. Wait 4 minutes (do not rinse), then apply 1-3 drops of K18 molecular repair hair oil to mid-lengths and ends.

8. Wait 4 minutes, then proceed with cut or style as usual.

9. Add an additional 1-3 drops of K18 molecular repair hair oil to dry hair as a finisher.

Please see the “K18 + toning or glossing” section for more information on toning with K18.
learn more on our blog
The Top K18 Mask FAQs
The Top K18 Mask FAQs
answering your most-asked questions.
about The Top K18 Mask FAQs
How much leave-in mask should you use?
/ products
How much leave-in mask should you use?
A handy dosage guide for every hair type, density, and length.
about How much leave-in mask should you use?
How to Build Your Clients’ Take-Home Routines with K18 Mask + DAMAGE SHIELD
/ business
How to Build Your Clients’ Take-Home Routines with K18 Mask + DAMAGE SHIELD
A PRO’s top tips for building your clients’ take-home routines
about How to Build Your Clients’ Take-Home Routines with K18 Mask + DAMAGE SHIELD
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4.9
Rated 4.9 out of 5 stars
Based on 2,306 reviews
97%would recommend these products
Customers Talked About
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2,306 reviews
  • Юлія Ш.
    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
    Hair Type Grey Hair, Medium Density
    My Results Less Frizz, Visible Difference, Smoother Hair, Soft Touchable Hair
    Rated 5 out of 5 stars
    2 days ago
    This mask is fantastic!

    This mask genuinely delivers. My hair was dry and damaged from coloring, and after just the first use it felt noticeably softer and more manageable. Less breakage, less frizz, and split ends look better too.

    Was this helpful?
    K18Hair PRO
    2 days ago

    Thank you so much for the 5-star review! We're thrilled to hear our Leave-In Molecular Repair Hair Mask is delivering such fantastic results for your hair. 💙✨

  • Samantha P.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 35 - 44
    Hair Concern Dryness, Frizz, Split-Ends, Heat damage
    Hair Type Curly/Coily, Medium Density
    My Results Less Frizz, Bouncy Hair, Visible Difference, Stronger Hair, Smoother Hair
    Rated 5 out of 5 stars
    4 days ago
    Instant results!

    The way my hair instantly got hydrated simply after 3 pumps had me in a state of shock! And after styling, my hair was light and looking healthy!!

    Was this helpful?
    K18Hair PRO
    4 days ago

    Thank you so much for the love, Samantha! 💙 We're thrilled to hear you're getting instant results with our Full-Size Leave-In Molecular Repair Hair Mask! ✨

  • Vinnie T.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 65+
    Hair Concern Frizz, Dryness, Extending time between washes
    Hair Type Medium Density, Curly/Coily, Grey Hair
    My Results Less Frizz, Bouncy Hair, Visible Difference, Stronger Hair, Cleaner, fresher hair
    Rated 5 out of 5 stars
    5 days ago
    I received my first K18 from my children as a Christmas Gift

    I ran out after 7 months of use and was without it for 1 month…my hair totally suffered. I am grateful that I could afford to buy one for myself. My hair perked up immediately after the first use. Love this product. I’m 86 this month. My hair is amazing.

    Was this helpful?
    K18Hair PRO
    5 days ago

    Thank you so much for the love! 💙 We're thrilled to hear the Full-Size Leave-In Molecular Repair Hair Mask is making such a difference for your hair. You're amazing! ✨

  • Madeline Z.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 25 - 34
    Hair Concern Split-Ends, Fragile/brittle hair, Chemical damage, Heat damage, Color-care
    Hair Type Medium Density, Grey Hair, Straight/Wavy
    My Results Bouncy Hair, Visible Difference, Stronger Hair, Less Breakage, Soft Touchable Hair
    Rated 5 out of 5 stars
    1 week ago
    She’s small - but mighty!

    One of the few repair treatments I can genuinely see and feel a difference with! My hair feels stronger, softer and healthier without feeling heavy or coated. A staple in my routine, especially after color or heat styling.

    Was this helpful?
    K18Hair PRO
    1 week ago

    Thank you so much for the love! 💙 We're thrilled to hear you're seeing and feeling such amazing results with the Molecular Repair Hair Mask! ✨

  • Sheri D.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 55 - 64
    Hair Concern Frizz, Dryness
    Hair Type Thick/Coarse
    My Results Less Frizz, Soft Touchable Hair
    Rated 4 out of 5 stars
    2 weeks ago
    I see some improvement I hair texture.

    I have used K18 for the last 4 washing and I can actually say I have seen improvement in my hair. I have long. Think hair. The ends were stating to feel dry and frizzy. My hair has improved with K18.

    Was this helpful?
    K18Hair PRO
    2 weeks ago

    Thank you so much for the love! 💙 We're thrilled to hear you're seeing improvement in your hair texture with the K18 Leave-In Molecular Repair Hair Mask! ✨

*Disclaimers