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Leave-in molecular repair hair mask 50mL
1. patented peptide reverses damage 2. highly concentrated formula 3. for all hair types 4. works in 4 minutes 5. easy leave-in, no rise needed 6. vegan & cruelty-free
Before and after image using detox, mask, conditioner, and oil
highly concentrated formula = a little goes a long way
Curly hair before using K18 mask and curly hair after using K18 mask.
full size leave in mask- start with 1 pump add more as needed. Mini size mask- start with 3 pumps add more as needed.
Clinically proven to reverse damage from: bleach + color, chemical services, and heat.
Where does K18 fit into your routine? 1. Shampoo (skip conditioner) 2. Towel dry 3. K18 4. wait for minutes 5. everything else
full size leave-in molecular repair hair mask- 50 does per bottle.
full size Molecular Repair Mask swatch 50 mL
4.9
Rated 4.9 out of 5 stars
1,823 Reviews

full-size leave-in molecular repair hair mask

Retail size of our 4-minute leave-in treatment to reverse hair damage

Professional Only

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Description

A retail-sized version of the K18 mask helps to maintain your client's hair strength and elasticity in-between salon appointments. This leave-in treatment mask for all hair types that reverses damage in 4 minutes. Patented peptide technology works to repair damage from bleach + color, chemical services, and heat* — restoring strength, softness, smoothness, and bounce to hair.

20+ billion TikTok views 🔥 

*Disclaimers

Repairs Damage Caused By

  • Bleach + Color
  • Heat
  • Chemical Services

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 from even extreme damage - 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

Simplified repair - convenient, leave-in formula works in just 4 minutes, with no extra rinse required

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

  • K18PEPTIDE™ is a biotech-developed peptide that mimics hair's structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during bleaching, 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

  1. Shampoo, do not condition. Towel-dry thoroughly
  2. Apply 1-3 pumps of K18 leave-in molecular repair hair mask based on your length and density, starting at the ends and working up towards the roots
  3. Let sit for 4 minutes. Do not rinse out
  4. Comb, add product + style as usual. Use for 4-6 washes post-salon service, then as needed
  • DO clarify before K18 if your client is a heavy product user (demineralize for mineral + metal buildup)
  • DO apply on clean, damp hair
  • 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
molecular repair hair oil
4.8
Rated 4.8 out of 5 stars
355 Reviews
Weightless oil that strengthens, repairs damage + reduces frizz Log In / REGISTER
PEPTIDE PREP™ detox shampoo
4.8
Rated 4.8 out of 5 stars
224 Reviews
Retail size of our color-safe, non-stripping clarifying shampoo formulated with the K18PEPTIDE™ Log In / REGISTER

Description

A retail-sized version of the K18 mask helps to maintain your client's hair strength and elasticity in-between salon appointments. This leave-in treatment mask for all hair types that reverses damage in 4 minutes. Patented peptide technology works to repair damage from bleach + color, chemical services, and heat* — restoring strength, softness, smoothness, and bounce to hair.

20+ billion TikTok views 🔥 

*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.
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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 1,823 reviews
1,823 reviews
  • Briana H.
    Verified Buyer
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 35 - 44
    Hair Concern Color-care, Heat damage, Split-Ends
    Hair Type Thick/Coarse, Curly/Coily
    My Results Less Frizz, Smoother Hair, Defined Curl/Wave Pattern
    Rated 5 out of 5 stars
    1 week ago
    Amazing

    I couldn’t believe how well

    This worked on my 4B super coily dense hair. Trust the instructions you really only need 2-3 pumps no extra conditioner.

    K18Hair PRO
    4 days ago

    Thank you Briana! Less is more is our motto!

  • Dawn B.
    Verified Buyer
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    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, Frizz, Split-Ends, Dryness
    Hair Type Fine/Thin, Curly/Coily, Grey Hair
    My Results Less Frizz, Visible Difference, Stronger Hair, Less Breakage, Soft Touchable Hair
    Rated 5 out of 5 stars
    2 weeks ago
    Great Product

    My hair has been much softer since I've been using K18. It's been about 6 weeks now.

    Glad I found out about K18!!!!

    K18Hair PRO
    4 days ago

    Love your hair! Thank you for your review Dawn!

  • Andrea B.
    Verified Buyer
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    Reviewing
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    I recommend this product
    Age 35 - 44
    Hair Concern Heat damage, Color-care, Dryness, Split-Ends, Frizz
    Hair Type Medium Density
    My Results Visible Difference, Less Breakage, Stronger Hair, Smoother Hair
    Rated 5 out of 5 stars
    3 weeks ago
    Love it

    Really makes my hair stronger and hair cut lasts longer

    K18Hair PRO
    3 weeks ago

    Thank you Andrea! We appreciate your review!

  • Holley O.
    Verified Buyer
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    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
    Hair Type Medium Density, Straight/Wavy, Curly/Coily
    My Results Less Frizz, Less Breakage, Smoother Hair, Visible Difference, Shinier Hair
    Rated 5 out of 5 stars
    1 month ago
    So far so good!

    I noticed my hair looks much smoother after only using this product sporadically the last 2 months. I just hate not using conditioner after my shampoo .. that is why I have not used it as directed. Looking at my photos I need to give it a good try. Will upate after using it the next feq weeks consistently!

    K18Hair PRO
    3 weeks ago

    Thank you Holley! You can use conditioner after the mask has been applied and the 4 minutes have surpassed.

  • Diana G.
    Verified Buyer
    Full-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)
    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 Medium Density
    My Results Visible Difference
    Rated 5 out of 5 stars
    1 month ago
    Lo mejor este producto

    Me encanta es mi segundo fresco, compré el pequeño y me encanto por eso compré el más grande I love

    K18Hair PRO
    1 month ago

    ¡Gracias Diana! ¡Nos encanta saber que estás disfrutando de tu mascarilla K18 Molecular Repair!

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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
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