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Professional Molecular Repair Hair Mask 150mL
Curly hair before using K18 mask and curly hair after using K18 mask.
Professional Molecular Repair Mask pump gif 150 mL
reverse damage. transform results. finish with stronger, more resilient hair.
Professional Molecular Repair Hair Mask 150mL - model
Professional Molecular Repair Mask swatch 150 mL

professional molecular repair mask

Second step of K18REPAIR™ service reverses damage post-service
Rated 4.8 out of 5
Based on 1616 reviews

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

Professional Only

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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

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.

  • 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

Rated 5.0 out of 5
Based on 164 reviews
First step of K18REPAIR™ service restores up to 99% elasticity pre-service Log In / REGISTER

PEPTIDE PREP™ pro chelating hair complex

Rated 4.9 out of 5
Based on 18 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.
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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.

reviews

average rating 4.8 out of 5
Based on 1616 reviews
  • 5 Stars
    1465 Reviews
  • 4 Stars
    88 Reviews
  • 3 Stars
    35 Reviews
  • 2 Stars
    8 Reviews
  • 1 Star
    20 Reviews
96% of reviewers would recommend this product to a friend
Customer photos and videos
1616 Reviews
Reviewed by Arianna T.
Verified Buyer
I recommend this product
Age
18 - 24
Hair Concern
  • Color-care
  • Frizz
  • Heat damage
  • Dryness
  • Fragile/brittle hair
Hair Type
  • Fine/Thin
My Results
  • Soft Touchable Hair
  • Less Frizz
  • Bouncy Hair
  • Visible Difference
  • Defined Curl/Wave Pattern
Rated 5 out of 5
Review posted

Amazing!

I have always struggled with my 3B curly hair being frizzy and dry due to consistent dying. I’ve noticed a significant improvement in the texture. My hair feels like hair again with the moisture helped my curl pattern shine! I’ve gotten TONS of compliments on my hair asking if it was natural after I started using it!

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K18Hair PRO

Thank you Arianna for your 5 star review!

Reviewed by simone_zinn@yahoo.com s.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Heat damage
  • Chemical damage
Hair Type
  • Medium Density
My Results
  • Less Frizz
  • Visible Difference
  • Smoother Hair
Rated 5 out of 5
Review posted

really works

has noticed a difference in my hair in just 3 uses.

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K18Hair PRO

We appreciate your review!

Reviewed by Leah R.
Verified Buyer
I recommend this product
Age
55 - 64
Hair Concern
  • Frizz
  • Dryness
Hair Type
  • Medium Density
  • Curly/Coily
My Results
  • Less Frizz
  • Visible Difference
  • Soft Touchable Hair
  • Defined Curl/Wave Pattern
Rated 5 out of 5
Review posted

Elixir for Hair

Softens and repairs hair, instilling elasticity and reducing frizz.

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K18Hair PRO

Thank you Leah for your review!

Reviewed by Katy K.
Verified Buyer
I recommend this product
Age
25 - 34
Hair Concern
  • Chemical damage
  • Heat damage
Hair Type
  • Medium Density
  • Straight/Wavy
My Results
  • Visible Difference
Rated 5 out of 5
Review posted

Impressed after first use

Very impressed after my first use, I feel like I’ve noticed a difference already so I’m very excited to proceed with my next few K18 wash days!

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K18Hair PRO

We appreciate your review Katy!

Reviewed by Sandy L.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Chemical damage
  • Color-care
  • Dryness
  • Split-Ends
Hair Type
  • Medium Density
My Results
  • Less Frizz
  • Stronger Hair
  • Less Breakage
Rated 5 out of 5
Review posted

Defiantly see a difference after the first use

I like it but it is expensive so be ready to take that wallet out.

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K18Hair PRO

Thank you for your review Sandy!

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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