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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)
tile bestseller | color: black
4.9
Rated 4.9 out of 5 stars
2,133 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

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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.

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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

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See how K18 unlocks our community's expression
4.9
Rated 4.9 out of 5 stars
Based on 2,133 reviews
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2,133 reviews
  • Brianna E.
    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, Heat damage, Dryness, Split-Ends, Frizz
    Hair Type Fine/Thin, Straight/Wavy
    My Results Less Frizz, Stronger Hair, Shinier Hair, Smoother Hair, Soft Touchable Hair
    Rated 5 out of 5 stars
    Yesterday
    This has transformed my hair

    I get bleach highlights every 6 weeks. I take really good care of my hair but there's only so much you can do when you bleach your hair. Ive been using this only 2 weeks and I got my hair done yesterday. My stylist was SO impressed with how healthy my hair is. She asked what I've been using and I told her! She told me she loves k18 as well!!

    Was this helpful?
  • Danielle K.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 55 - 64
    Hair Concern Dryness, Fragile/brittle hair, Color-care
    Hair Type Medium Density, Straight/Wavy, Grey Hair
    My Results Less Frizz, Visible Difference, Smoother Hair, Soft Touchable Hair
    Rated 4 out of 5 stars
    2 weeks ago
    Super soft and great humidity control

    Just started using the K18 mask. I'm pleased at how soft my processed, menopausal hair is. It's become so dry, but K18 makes it feel and look more like hair again. I was really impressed with how well it controlled humidity induced frizz too - nothing I've tried before has worked so well against humidity.

    Was this helpful?
    K18Hair PRO
    1 week ago

    Thank you so much for this wonderful review, Danielle! We're absolutely thrilled to hear how much the K18 mask is transforming your processed hair and bringing it back to life. We're especially excited that you're seeing such impressive results with humidity control! That frizz-fighting power is something we're really proud of, and it sounds like it's making such a difference for you. Thank you for sharing your experience - it truly means the world to us! 💛

  • KanietSE K.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 25 - 34
    Hair Concern Chemical damage
    Hair Type Fine/Thin
    My Results Less Breakage
    Rated 4 out of 5 stars
    3 weeks ago
    After perm

    After an unsuccessful perm, I took this mask. As it is written in the instructions, I applied only it 6 times in a row. I'm glad that the smell of burning from my hair is almost gone. Visually, the changes are not as clear as I would like, but I will continue to use. I’m sure it would be better if I give more time

    Was this helpful?
    K18Hair PRO
    2 weeks ago

    Thank you so much for taking the time to share your experience with the Leave-In Molecular Repair Hair Mask after your perm situation, KanietSE! We're really glad to hear that you're already noticing the burning smell is almost gone — that's definitely a positive sign that the mask is working to repair the damage at a molecular level.

    We completely understand that visual changes can take time to become more apparent, especially after chemical damage from an unsuccessful perm. You're absolutely right that giving it more time will likely bring better results. The molecular repair process works progressively with each use, so continuing with the treatment as you're doing is exactly the right approach.

    We really appreciate your patience and persistence with the treatment, and we'd love to hear how your hair continues to improve as you keep using the mask. Your hair has been through a lot, so the fact that you're already seeing some positive changes is really encouraging!

  • Lillian D.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 18 - 24
    Hair Concern Heat damage, Fragile/brittle hair, Frizz, Split-Ends, Chemical damage
    Hair Type Curly/Coily, Straight/Wavy, Medium Density
    My Results Less Frizz, Defined Curl/Wave Pattern, Cleaner, fresher hair, Less Breakage, Visible Difference
    Rated 5 out of 5 stars
    1 month ago
    Good Progress So Far

    I have used this product a few times so far and have already seen great results and improvements. I’d like to keep up with it consistently and come back with update photos!

    Was this helpful?
    K18Hair PRO
    1 month ago

    Thank you so much for your incredible review, Lillian! We're absolutely thrilled to hear that our Full-Size Leave-In Molecular Repair Hair Mask is already delivering great results and improvements after just a few uses - there's no better compliment than knowing our molecular repair technology is working so beautifully that you're excited to keep up with it consistently! We'd love to see those update photos when you're ready to share your continued progress! ❤️

  • Nancy J.
    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
    Hair Type Curly/Coily
    My Results Less Breakage, Bouncy Hair
    Rated 5 out of 5 stars
    1 month ago
    Love this hair mask

    This mask has saved my hair!

    Was this helpful?
    K18Hair PRO
    1 month ago

    Thank you so much for your incredible review, Nancy! We're absolutely thrilled to hear that our Full-Size Leave-In Molecular Repair Hair Mask has saved your hair - there's no better compliment than knowing our molecular repair technology is giving your hair the rescue it needed! ❤️