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)
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)
tile bestseller | color: black
4.9
Rated 4.9 out of 5 stars
2,203 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.

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bestseller
professional molecular repair mist 300mL
5.0
Rated 5.0 out of 5 stars
169 Reviews
First step of K18REPAIR™ service restores up to 99% elasticity pre-service View Product

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

got questions?
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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.
soft, strong, bouncy hair for everyone
Repair damage for hair like new* in 4 minutes.
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"I have fallen in LOVE with this product and i haven’t had a single client disappointed"
-Sydne S.
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"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.

learn more
how to use K18
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

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See how K18 unlocks our community's expression
4.9
Rated 4.9 out of 5 stars
Based on 2,203 reviews
97%would recommend these products
Customers Talked About
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2,203 reviews
  • Nucole N.
    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, Chemical damage
    Hair Type Curly/Coily
    My Results Stronger Hair, Defined Curl/Wave Pattern
    Rated 5 out of 5 stars
    1 hour ago
    K18

    I have been using this for a week now and I have great results my curls are coming back so much better still have a long way to go but this product is amazing

    Was this helpful?
    K18Hair PRO
    4 minutes ago

    Thank you for the wonderful review! We're so happy to hear your curls are coming back and that you're seeing great results with the Molecular Repair Hair Mask already!

  • Dena F.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 18 - 24
    Hair Concern Split-Ends
    Hair Type Fine/Thin
    My Results Less Frizz, Visible Difference, Less Breakage, Smoother Hair
    Rated 5 out of 5 stars
    3 days ago
    Good stuff

    I have very baby fine hair. I have been struggling to find a shampoo and conditioner that will make my hair look, soft and shiny and not weighed down and drab. I've only been using this for two weeks so far so good definite improvement in the texture my hair softer and shinier. I can't use the hair oil because it's too heavy for my hair., I will keep working with it. The molecular hair oil works really well from my daughter's hair and my son. I love how this company gives out decent samples too. It's such a good way to share with other people and then try the product before you wired to see if it works well for you or not.

    Was this helpful?
    K18Hair PRO
    3 days ago

    Thank you for the wonderful review! We're so happy to hear the Molecular Repair Hair Mask is making your fine hair softer and shinier. Thanks for sharing your experience!

  • Lilia H.
    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, Color-care, Frizz, Dryness
    Hair Type Thick/Coarse
    My Results Stronger Hair, Visible Difference, Less Frizz, Smoother Hair, Soft Touchable Hair
    Rated 5 out of 5 stars
    6 days ago
    1st noticed difference

    Had drastic issues with my hair after my last bleach and a previous hairstylist recommended this product. I instantly noticed a change in my hair after first use. My natural curls are back. Excited to see the results after more uses.

    Was this helpful?
    K18Hair PRO
    5 days ago

    Thank you for your amazing review, Lilia! 💛 We're thrilled the Leave-In Molecular Repair Hair Mask brought your natural curls back after bleach damage. Excited for your continued results! ✨😊

  • Mary S.
    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, Fragile/brittle hair, Frizz, Dryness, Extending time between washes
    Hair Type Curly/Coily, Grey Hair, Fine/Thin, Thick/Coarse
    My Results Less Frizz, Visible Difference, Stronger Hair, Less Breakage, Defined Curl/Wave Pattern
    Rated 5 out of 5 stars
    1 month ago
    Saved my hair!!

    I have curly heavily highlighted hair blended with corse gray curls coming in. Such a mix! And Curly hair alone is a bit fragile I also swim laps in a saltwater pool and have a hot tub I use often. I use K18 as on not the biggest mainstays in hair routine.

    Was this helpful?
    K18Hair PRO
    3 weeks ago

    Thank you so much for this incredible review, Mary! We're absolutely thrilled to hear that K18 has saved your hair - that's exactly what we love to hear! It's wonderful that the Full-Size Leave-In Molecular Repair Hair Mask is working so beautifully for your curly, highlighted hair with those gorgeous gray curls coming in. We understand how challenging it can be to maintain healthy hair with swimming in saltwater pools and hot tub use, so we're so excited that K18 has become one of your biggest mainstays in your hair routine! Thanks for your amazing 5-star review! 💛

  • Shannon W.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 45 - 54
    Hair Concern Chemical damage, Color-care, Heat damage
    Hair Type Thick/Coarse, Medium Density
    My Results Stronger Hair, Less Breakage, Smoother Hair, Shinier Hair
    Rated 5 out of 5 stars
    1 month ago
    Love K18

    I’m at hairstylist in K 18. Tina has been a complete game changer for me. I use it on myself and I am completely loving the results. I’m using the hair oil to leave in restructuring cream and the shampoo and conditioner and have had absolutely wonderful results. my hair is so silky brought the shine back instantly right after I had highlighted my hair, which usually takes a couple weeks for it feel healthy again.

    Was this helpful?
    K18Hair PRO
    3 weeks ago

    We absolutely love hearing from hairstylists who are experiencing such amazing results ✨ So thrilled that K18 has been a complete game changer for you Shannon! Nothing makes us happier than knowing you're getting that instant shine and silky feel, especially right after highlighting. Thanks so much for sharing your professional experience with our full routine! 💛