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professional molecular repair mask

part of the K18 PRO Service
Rated 4.9 out of 5
Based on 277 reviews
150 mL

This part of the PRO service is a peptide-powered treatment to repair in-salon damage from bleach + color, chemical services, and heat in just 4 minutes. Typically used toward the end of the salon service, the pH level of 5.0–6.0 helps close down the cuticle to seal in the K18PEPTIDE™ for renewed strength + elasticity where it matters.

Repairs Damage Caused By

  • Bleach + Color Bleach + Color
  • Heat Heat
  • Chemical Services Chemical Services

Professional Only

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more to know

The PRO mask is engineered to do cleanup duty after bleach + color, chemical services, and heat—restoring strength + elasticity to damaged strands. Lightweight conditioning benefits give your clients smooth, soft, strong, and bouncy hair, even after all the damage done in the salon.

Damage is ongoing

Send the K18 retail sizes home with your client to keep hair health going, make services last longer, and strengthen their canvas so you can go further during the next appointment.

how to optimize K18

  • Do clarify before K18 if you’re a heavy product user (demineralize for hard water 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 afetr 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

how to use

  1. Shampoo, do not condition.
  2. Towel dry thoroughly.
  3. Part hair into equal sections. Begin with 1 pump of K18 Mask and add more as needed depending on length, thickness, and condition. Work evenly into hair from ends to roots, one pump at a time.
  4. Let sit for 4 minutes to activate. Do NOT rinse out.
  5. Style as usual.
  6. If cutting, you may start right away.
  7. If toning, use K18 Mask then apply toner over K18 Mask. Process as usual. Rinse/shampoo toner, towel-dry thoroughly. Reapply K18 Mask as per instructions above. Style as usual.

key benefits

  • Infused with our patented K18PEPTIDE™, clinically proven to reverse damage in just 4 minutes.
  • Repairs damage from bleach + color, chemical services, and heat.
  • Restores strength, softness, smoothness, and bounce for all hair types.
  • Lasting + progressive results get better with continued use
  • Vegan, color-safe, cruelty-free

With just one salon treatment using the K18 PRO Service (PRO mist + mask), hair is restored up to:

91% original strength*
94% original elasticity*

*Results observed in a clinical study while using mist and mask as part of a bleaching treatment. Results may vary depending on hair type, quality, and history.

ingredients

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.

Description

This part of the PRO service is a peptide-powered treatment to repair in-salon damage from bleach + color, chemical services, and heat in just 4 minutes. Typically used toward the end of the salon service, the pH level of 5.0–6.0 helps close down the cuticle to seal in the K18PEPTIDE™ for renewed strength + elasticity where it matters.

backed by science,
loved by stylists

Our community of stylists and colorists in 33 countries believe K18 is liberating hair—no matter the hair type or generation.

Reverse damage & reestablish curl pattern on dry, coarse hair with K18 Mask.
Bring brittle aging hair back to its youthful state with K18 Mask & Mist.
Protect the strength & integrity of hair during an extreme color transformation with K18 Mist & Mask.
Restore & strengthen hair with K18 Mist & Mask during highlights service.
pros using K18

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.

have questions?

we have answers.

who is k18 mask for?

K18 is safe to use on all hair types and textures, all generations, and was made to be used on all types of damage.

how do you use k18 mask as part of a lighting or color service?

K18 Mask is used after processing bleach/color by following the below steps.
- Shampoo hair. Skip the conditioner.
- Towel-dry thoroughly.
- Apply K18 Mask, the amount needed depends on client’s hair type and condition. Reference chart for approximate dosage.
- Leave for 4 minutes before styling. DO NOT rinse out.
- If cutting, begin right away. Make sure to wait the full 4-minute wait period before heat styling.
- If toning, apply toner/gloss on top of K18 Mask. Process toner/gloss as required. Shampoo and rinse. Follow with a secondary application of K18 mask. Towel dry thoroughly. Style as usual.

will applying toner on top of k18 mask affect the outcome of my color?

K18 will not interfere with toner or final color. Colorists tell us K18 Mask actually improves their results, as it evens out the hair’s porosity, creating a more uniform and vibrant color application.

how do i use k18 mask during a haircut or as a treatment on its own?

Follow these steps to use K18 with a hair cut or alone as a treatment service.
- Shampoo and rinse. Skip the conditioner.
- Towel dry thoroughly.
- Apply K18 Mask, the amount needed depends on client’s hair type and condition. Reference chart for approximate dosage.
- Wait 4 minutes. DO NOT rinse. If cutting, begin right away.
- Make sure to wait 4 minutes before heat styling or using other styling products. If needed, you may also condition or add a leave-in once 4 minutes has elapsed with K18.

can i use k18 mist + mask together?

These formulas are intended to be used at separate times during the service but work together to renew damaged hair from the inside out.

During a chemical service, K18 Mist is applied prior to chemical application. K18 Mask is applied post-service to renew damaged caused during the chemical service.

During a few services, you will only use theK18 Mist in the salon. During a perm for example, K18 Mist is applied before the perm solution, K18 mist is then reapplied again after the neutralizer instead of the mask to avoid additional weight on newly formed curls.

is k18 a replacement for conditioner?

K18 was created to restore hair’s strength and elasticity by reconnecting broken polypeptide chains (keratin chains) responsible for hair’s core structure. Detangling and conditioning benefits are often a bonus clients experience from K18 use. Once K18 Mist or Mask has been applied and you’ve waited the initial 4-minute wait period, you can add a leave-in conditioner. Most stylists tell us the K18 Mask alone provides all the necessary conditioning for their client’s hair.
reviews
average rating 4.9 out of 5
Based on 277 reviews
  • 5 Stars
    262 Reviews
  • 4 Stars
    11 Reviews
  • 3 Stars
    3 Reviews
  • 2 Stars
    0 Reviews
  • 1 Star
    1 Review
99% of reviewers would recommend this product to a friend
Customer photos and videos
277 Reviews
Reviewed by Jacqueline D.
Verified Buyer
I recommend this product
Age
45 - 54
Hair Concern
  • Chemical damage
  • Dryness
  • Heat damage
  • Frizz
  • Color-care
Hair Type
  • Fine/Thin
My Results
  • Less Frizz
  • Visible Difference
  • Bouncy Hair
  • Stronger Hair
  • Less Breakage
Rated 5 out of 5
Review posted

K18 treatment

Amazing product! Leaves damaged hair feeling healthy and strong. I will continue to use this product on my clients. Absolutely love it!

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Reviewed by Jesseca Alosaimi F.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Chemical damage
Hair Type
  • Medium Density
  • Straight/Wavy
My Results
  • Less Frizz
  • Shinier Hair
  • Visible Difference
Rated 5 out of 5
Review posted

I’m a believer

I didn’t want to believe the hype and finally gave it. This product is amazing and makes the hair feel so gorgeous.

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K18Hair PRO

Thank you for your review Jesseca.

Reviewed by Samantha K.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Dryness
  • Split-Ends
  • Chemical damage
  • Color-care
Hair Type
  • Medium Density
My Results
  • Stronger Hair
  • Less Breakage
  • Visible Difference
  • Less Frizz
  • Smoother Hair
Rated 4 out of 5
Review posted

Forget about Olaplex

I was in some of the original launch program for other products claiming similar results years ago. I can tell you hands down they are not as effective as K-18 has proven to be. As a professional I had a bit of a curve with my preferences after directed use on myself and clientele. If you are a salon owner or professional this is a must.

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K18Hair PRO

Thank you for your awesome review Samantha!

Reviewed by Andrew T.
Verified Buyer
I recommend this product
Age
45 - 54
Hair Concern
  • Heat damage
  • Fragile/brittle hair
  • Chemical damage
  • Color-care
  • Dryness
Hair Type
  • Fine/Thin
  • Grey Hair
  • Straight/Wavy
  • Thick/Coarse
  • Medium Density
My Results
  • Defined Curl/Wave Pattern
  • Soft Touchable Hair
  • Smoother Hair
  • Less Breakage
  • Visible Difference
Rated 5 out of 5
Review posted

The most important tool at my station.

After over 60 thousand hours of work in the hair industry. This molecular repair mask is unparalleled. It does exactly what it is designed for.

So many of my clients have purchased it for home use. Every time they return they say, “My hair texture is so much better”, “Look at how good my natural waves behave!”, “I love how blonde and healthy my hair is!”.

Thanks K18!

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K18Hair PRO

Thank you for your awesome review Andrew!

Reviewed by Tasia l.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Chemical damage
  • Fragile/brittle hair
  • Split-Ends
Hair Type
  • Fine/Thin
My Results
  • Visible Difference
  • Soft Touchable Hair
  • Shinier Hair
  • Less Breakage
Rated 5 out of 5
Review posted

Hands down the best product in the hair world

If you are not using k18 on every client you are not doing it right! This is the best product I have ever come across. Within one use you can instantly tell a difference.

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K18Hair PRO

Thank you for your awesome review Tasia.

Calculating…

based on your client + service

DOSAGE CALCULATION

pre-service

Apply a generous amount to damp hair, section by section

post-service

3 pumps
throughout the hair

How to use

  • Prep hair by lightly misting with water.
  • Apply K18 Mist section by section.
  • Wait 4 minutes. DO NOT rinse. (This is a good time to mix or prepare for your Lightening Service.)
  • Apply Lightener directly on top of K18 Mist. (Dry hair if needed prior to application.)
  • Process as usual.
  • Shampoo hair. Skip the conditioner.
  • Towel dry thoroughly.
  • Apply K18 Mask.
  • Leave for 4 minutes before styling. DO NOT rinse out.
  • If toning, apply toner / gloss on top of K18 Mask. Process toner / gloss as required. Shampoo and rinse. Towel dry thoroughly. Follow with secondary application of K18 Mask for 4 minutes.
  • Style as usual.

client recommendation

At-Home Treatment

Leave in Molecular Hair Repair Mask

2 pumps

Use for the first 4-6 washes, then every 3-4 washes for ongoing damage repair.

optimize K18

skip the conditioner

Conditioners coat hair making it harder for our K18Peptide™ to effectively penetrate strands and get into the inner layers of hair. We like to skip it so the peptide can get right to damage sites without interruption. If strands need a little more love, you can add a leave-in conditioner once the initial 4-minute wait period is over.

clarify first

Excessive product or mineral buildup on hair can prevent our K18Peptide™ from effectively penetrating strands. If hair is heavy with buildup, start with a clarifying treatment before using K18 to remove residue that may block our peptide from getting where it needs to go.

continue use

Damage is ongoing, so clients' use of K18 should be too. This progressive treatment makes hair healthier with each use. Continue their hair renewal at home by using K18 for the first 4-6 washes, then every 3-4 washes to maintain the integrity of damaged hair.

less is more

Our Pro Mask is highly concentrated, meaning a little goes a long way. Don’t oversaturate hair and refer to our dosage chart to find the optimal amount for each client’s hair type and service.

more is more

When using the Pro Mist, the more the merrier to reset damage before a chemical service. Use pre-service for a healthy canvas by applying a generous amount of the Pro Mist to damp hair, section by section.

made for all

K18 Pro Mist + Mask are compatible with all products and all hair types regardless of texture, generation, or level of damage.

optimize K18

clarify first

Excessive product or mineral buildup on hair can prevent our K18Peptide™ from effectively penetrating strands. If hair is heavy with buildup, start with a clarifying treatment before using K18 to remove residue that may block our peptide from getting where it needs to go.

more is more

When using the Pro Mist, the more the merrier to reset damage before a chemical service. Use pre-service for a healthy canvas by applying a generous amount of the Pro Mist to damp hair, section by section.

made for all

K18 Pro Mist + Mask are compatible with all products and all hair types regardless of texture, generation, or level of damage.

optimize K18

clarify first

Excessive product or mineral buildup on hair can prevent our K18Peptide™ from effectively penetrating strands. If hair is heavy with buildup, start with a clarifying treatment before using K18 to remove residue that may block our peptide from getting where it needs to go.

continue use

Damage is ongoing, so clients' use of K18 should be too. This progressive treatment makes hair healthier with each use. Continue their hair renewal at home by using K18 for the first 4-6 washes, then every 3-4 washes to maintain the integrity of damaged hair.

more is more

When using the Pro Mist, the more the merrier to reset damage before a chemical service. Use pre-service for a healthy canvas by applying a generous amount of the Pro Mist to damp hair, section by section.

made for all

K18 Pro Mist + Mask are compatible with all products and all hair types regardless of texture, generation, or level of damage.

optimize K18

skip the conditioner

Conditioners coat hair making it harder for our K18Peptide™ to effectively penetrate strands and get into the inner layers of hair. We like to skip it so the peptide can get right to damage sites without interruption. If strands need a little more love, you can add a leave-in conditioner once the initial 4-minute wait period is over.

clarify first

Excessive product or mineral buildup on hair can prevent our K18Peptide™ from effectively penetrating strands. If hair is heavy with buildup, start with a clarifying treatment before using K18 to remove residue that may block our peptide from getting where it needs to go.

continue use

Damage is ongoing, so clients' use of K18 should be too. This progressive treatment makes hair healthier with each use. Continue their hair renewal at home by using K18 for the first 4-6 washes, then every 3-4 washes to maintain the integrity of damaged hair.

less is more

Our Pro Mask is highly concentrated, meaning a little goes a long way. Don’t oversaturate hair and refer to our dosage chart to find the optimal amount for each client’s hair type and service.

made for all

K18 Pro Mist + Mask are compatible with all products and all hair types regardless of texture, generation, or level of damage.

K18 Pro Dosage Calculator ×
×

Send this to your client!

Your K18 Hair at-home treatment recommendation is of leave-in molecular repair hair mask for the first 4-6 washes, then every 3-4 washes for ongoing damage repair. For more information on the product and how to use, visit k18hair.com!

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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