Free Standard Shipping on $125+ Orders
free returns. buy with confidence
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™
4.9
Rated 4.9 out of 5 stars
1,871 Reviews

professional molecular repair mask

Second step of K18REPAIR™ service reverses damage post-service

Professional Only

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

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
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 Log In / REGISTER
PEPTIDE PREP™ pro chelating hair complex
5.0
Rated 5.0 out of 5 stars
20 Reviews
No-mix, spray-on demineralizing treatment 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

got questions?
Get started here
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.

healthier hair with every use

Reverse damage in 4 minutes with our breakthrough K18 molecular repair technology.
shopping with us has its perks

exclusive tools

Get access to monthly live training, professional education, and business guides.

free shipping on $125+ orders

Shop K18 at professional wholesale pricing (no order minimums here).

real support

We have K18 experts on standby to answer allll your product and order questions.

how molecular repair compares
how K18 works

Traveling into the innermost layers of hair, our K18PEPTIDE™ renews strength along the width AND length of hair for lasting strength where it matters.

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 1,871 reviews
1,871 reviews
  • Krystal P.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    Age 35 - 44
    Hair Concern Chemical damage, Heat damage, Frizz, Fragile/brittle hair, Split-Ends
    Hair Type Straight/Wavy, Fine/Thin
    My Results Less Frizz, Visible Difference, Smoother Hair
    Rated 3 out of 5 stars
    1 week ago
    Does it do what it claims? Meh…

    So I have used this product for 6 washes, exactly as directed. My hair had been damaged by bleach. The improvement I saw was temporary. The first two uses, it really helped smooth my ends. However, that was temporary and I now am back to square one. I wish it had lived up to the hype. Great leave in, but it’s not correcting any damage and it’s not as effective as it was at first.

    K18Hair PRO
    4 days ago

    Depending on how damaged your hair is you may need to repeat the 6 consecutive washes. If you would love a personalized recommendation we can better assist you via email at Hello@K18Hair.com.

  • Briana Q.
    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, Fragile/brittle hair, Heat damage
    Hair Type Fine/Thin
    My Results Visible Difference, Stronger Hair, Less Breakage, Smoother Hair, Soft Touchable Hair
    Rated 5 out of 5 stars
    1 week ago
    Beyond Amazing

    I have had such damaged hair due to bleaching my hair for years and the stylist not making hair health a priority first, and I have since let my hair grow out its natural color however due to the damage my ends have not been healthy in years and continue to break. I have tried EVERYTHING for the last two years and have been disappointed over and over again UNTIL this product, I cannot even begin to describe the growth and health this product has been able to give me in just 1 1/2 months already. This product used with the other products of this brand has truly gave me my confidence back and I cannot wait to try more products from this brand. I am finally seeing amazing results. 10/10 recommend

    K18Hair PRO
    4 days ago

    We love this for you! Healthy grow out! Thank you Briana!

  • Erin Moser, Could Be C.
    Verified Reviewer
    Reviewing
    Professional Molecular Repair Mask 150 mL (WHOLESALE)
    I recommend this product
    Age 35 - 44
    Client Hair Concerns Chemical Damage, Heat Damage, Color Care, Fragile/Brittle Hair, Split Ends
    Client Hair Types Fine/Thin, Straight/Wavy, Thick/Coarse, Curly/Coily, Grey Hair
    Client Results Visible Difference, Soft Touchable Hair, Less Frizz, Bouncy Hair, Less Breakage
    Rated 5 out of 5 stars
    1 week ago
    K18 changed our career.

    The K18 system changed how we work. Tbh, I did not believe the claims in 2020 when I first heard of the brand.

    I love every item. Especially the mask + mists.

    The pictures below are of a recent blonding guest - the difference is wildly beautiful, and proof that K18 is magical !!

    K18Hair PRO
    1 week ago

    Thank you for your trust! We appreciate you!

  • amanda s.
    Verified Buyer
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 18 - 24
    Hair Concern Dryness, Split-Ends, Frizz
    Hair Type Fine/Thin, Curly/Coily
    My Results Less Frizz, Stronger Hair, Less Breakage, Soft Touchable Hair
    Rated 4 out of 5 stars
    3 weeks ago
    The smell

    I love the smell so much! I’m glad that I bought this and waiting to see how this makes my hair look

    K18Hair PRO
    3 weeks ago

    Thank you Amanda!

  • Gergana G.
    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, Split-Ends, Oily hair/scalp
    Hair Type Fine/Thin
    My Results Visible Difference, Stronger Hair, Less Breakage, Soft Touchable Hair, Shinier Hair
    Rated 5 out of 5 stars
    3 weeks ago
    Love it!

    I absolutely love the mask! It’s definitely worth the hype—it has completely transformed my hair, making it so much healthier, even after years of bleaching.

    K18Hair PRO
    3 weeks ago

    Beautiful hair! Thank you for your review!

Pro Distribution Partners

Hair professionals can shop wholesale at the following distributors. Professionals within the US will also be able to shop directly from K18hair.com starting early 2021! Check back again soon for updates as we continue to expand globally.



Questions? Email us at hello@k18hair.com

Paramount Beauty Supply
USA
Salon Services Pro
USA
Salon Service Group
USA
Salonwax Pro
USA
Premier Beauty Supply
USA
Launching Soon
Ozdare - Australia
AU
 
Launching Soon
American Crew Ltd. - New Zealand
NZ
 
Launching Soon
PlayGround - Hong Kong
HK
 
Launching Soon
Session Map - Sweden
SE
 
Launching Soon
Cyprus
CY
 
Launching Soon
Belgium
BE
 
Coming Early 2021
Canada
CA
 
Coming Early 2021
Czech Republic
CZ
 
Coming Early 2021
Finland
FI
 
Coming Early 2021
France
FR
 
Coming Early 2021
Germany
DE
 
Coming Early 2021
Ireland
IR
 
Coming Early 2021
Italy
IT
 
Coming Early 2021
Netherlands
NL
 
Coming Early 2021
Norway
NO
 
Coming Early 2021
Singapore
SG
 
Coming Early 2021
Taiwan
TW
 
Coming Early 2021
UK
UK
 
Coming Early 2021
thank you for visiting!

You are now being redirected to an official partner website for this region where you can shop K18 Hair.

Changed your mind? Go back.

00:00
Blackfire Tracking
subscribe + save 15%
healthy hair on your schedule
Pick your K18 + how often you want to replen.
We’ll send you a heads up before every delivery.
You’re in charge. Change the way you pay, skip a shipment, or cancel anytime.