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pro peptide starter kit

Limited-edition set to reverse hair damage
Rated 4.9 out of 5
Based on 1730 reviews

Get started with the K18REPAIR™ service.

Powered by the reparative K18PEPTIDE™, the K18REPAIR™ service (K18 PRO mist + PRO mask) strengthens and fortifies hair before and reverses damage after salon services. Giving you the confidence to push transformations further on stronger, healthier hair.

Includes the professional molecular repair hair mist + the professional molecular repair hair mask, each engineered with the K18PEPTIDE™ and with specific formats and pH ranges for optimized use in all salon services.

Use both for maximum results—this service is clinically proven to repair damage from bleach* + color*, chemical services* + heat*

*Disclaimers

Repairs Damage Caused By

  • Bleach + Color
  • Heat
  • Chemical Services

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more to know

PRO mist

  • This leave-in, lightweight mist repairs existing damage to strengthen hair’s defenses and make it more resilient prior to salon services.
  • This PRO-exclusive product helps services apply and perform better, leaves hair healthier, and color lasts longer. Works in just 4 minutes in a convenient spray-on format.
  • The PRO mist is a simplified formula without added emollients to not interfere with chemical and color services. pH of 7.5-8.0 makes the treatment more efficient for optimal application pre-service.

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. pH level of 5.0-6.0 helps close down the cuticle to seal in the K18PEPTIDE™ for lasting strength + elasticity.

*Disclaimers

key benefits

  • PRO mist fortifies hair pre-service, restoring up to 99% elasticity*.
  • PRO mask is clinically proven to reverse damage from bleach* + color*, chemical services*, and heat* after services for immediate + lasting results.
  • Restores strength, softness, smoothness, and bounce
  • Immediate + progressive results
  • Vegan, color-safe, cruelty-free

*Disclaimers

how to use

How to use with a chemical service:

  1. Section dry hair into 4 quadrants.
  2. Apply 6-10 sprays of K18 pro chelating hair complex* per quadrant*.
  3. Wait 4 minutes after chelating** (do not rinse out), then 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, and level of damage.
  4. Wait 4 minutes (do not rinse out).
  5. If needed, dry the hair prior to applying lightener or color. Then perform your desired technique.
  6. Process your lightener or color as usual, then rinse and shampoo with K18 PEPTIDE PREP™ detox shampoo. Do not condition.
  7. 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.
  8. Wait 4 minutes (do not rinse), then apply 1-3 drops of K18 molecular repair hair oil to mid-lengths and ends.
  9. Wait 4 minutes, then proceed with cut or style as usual.
  10. 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.

How to use as part of a styling service or as part of a K18 molecular repair service standalone treatment:

  1. Section dry hair into 4 quadrants.
  2. Apply 6-10 sprays of K18 pro chelating hair complex per quadrant*.
  3. Wait 4 minutes after chelating**, then rinse and shampoo with K18 PEPTIDE PREP™ detox shampoo. Do not condition.
  4. Towel dry hair, then 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, and level of damage.
  5. Wait 4 minutes, then 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.
  6. Wait 4 minutes, then apply 1-3 drops of K18 molecular repair hair oil to mid-lengths and ends.
  7. Wait 4 minutes, then style as usual.
  8. Add an additional 1-3 drops of K18 molecular repair hair oil to dry hair as a finisher.

*For cases of extreme metal + mineral buildup, process up to 10 minutes, then proceed with the instructions.

**For best results, we recommend to use K18 chelator before every service. If not using K18 chelator, lightly dampen hair with water (do not saturate) before applying K18 PRO mist.

dos and don'ts

  • DO clarify before K18 if your client is a heavy product user (demineralize for mineral + metal buildup)
  • DO apply a generous amount of the PRO mist, Don’t overdo it with the mask—less is more
  • DO apply K18 mask on clean, damp hair (think about 65% wet)
  • 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 rinse it out
  • DON'T mix into your bleach or color
  • DON'T increase your bleach volume or alter your typical color formula

ingredients

PRO mist Ingredients: Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Polysorbate 20, sh-Oligopeptide-78 (K18PEPTIDE™), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Phenoxyethanol, Potassium Sorbate, Potassium Hydroxide, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol.

PRO mask 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

Get started with the K18REPAIR™ service.

Powered by the reparative K18PEPTIDE™, the K18REPAIR™ service (K18 PRO mist + PRO mask) strengthens and fortifies hair before and reverses damage after salon services. Giving you the confidence to push transformations further on stronger, healthier hair.

Includes the professional molecular repair hair mist + the professional molecular repair hair mask, each engineered with the K18PEPTIDE™ and with specific formats and pH ranges for optimized use in all salon services.

Use both for maximum results—this service is clinically proven to repair damage from bleach* + color*, chemical services* + heat*

*Disclaimers

got questions?

Get started here

how does it work?

The K18REPAIR™ service works by reversing damage before and after services for stronger, more resilient hair. K18 PRO mist restores chemically damaged hair before services, making hair more resilient for salon transformations. Use before services for a stronger foundation and to help prevent damage during services. Follow with the K18 PRO mask to reverse damage done during services and to soften, smooth, and condition hair.

The K18PEPTIDE™ powering both formulas reverses damage from bleach* + color*, chemical services*, and heat* in 4 minutes. It works by reconnecting breaks in the hair fiber along both the length (keratin chains) and the width (disulfide bonds) for holistic hair renewal.

*Disclaimers

who is it for?

K18 is engineered to work with every hair type, in every service, and with every routine.

why do i mist hair with water before using the pro mist?

We recommend misting hair with water before using the PRO mist to swell the cuticle layers and open up the hair fiber, allowing for maximum penetration of the peptide-powered PRO mist into the innermost layers of hair. In the same way a damp sponge absorbs more water, damp hair absorbs K18PEPTIDE™.

If you’re using the PEPTIDE PREP™ pro chelating hair complex, there’s no need to mist the hair with water before using the PRO mist.

will using toner on top of k18 PRO mist affect my client’s color?

K18 PRO mist will not interfere with toner or final color. In clinical testing, we’ve found that color lasts longer + fades slower* when paired with mask usage at home.

*Disclaimers

is k18 considered a protein?

K18 PRO mist + mask are not protein treatments, our biomimetic peptide naturally mimics the amino acid sequences in keratin to rebuild bonds broken by bleach, color, and chemical service damage. If your clients are experiencing dry, brittle hair, use PEPTIDE PREP™ detox shampoo pre-K18 mask to remove buildup.
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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 4.9 out of 5
Based on 1730 reviews
  • 5 Stars
    1581 Reviews
  • 4 Stars
    85 Reviews
  • 3 Stars
    37 Reviews
  • 2 Stars
    9 Reviews
  • 1 Star
    18 Reviews
96% of reviewers would recommend this product to a friend
Customer photos and videos
1730 Reviews
Reviewed by MJR
I recommend this product
Age
35 - 44
Hair Concern
  • Chemical damage
  • Heat damage
  • Color-care
  • Frizz
  • Fragile/brittle hair
Hair Type
  • Medium Density
My Results
  • Stronger Hair
  • Visible Difference
  • Smoother Hair
  • Less Breakage
  • Shinier Hair
Rated 5 out of 5
Review posted

This is IT for me!

For several years I have struggled with extreme breakage in the hair framing my face. Years of bleaching, stress and hormones (I’m 43) my bangs were 2in in length down to my temples. I would look at old pics of my hair and want to cry. I tried everything and have spent a small fortune but K18 saved my hair! I started with the pack of minis and that’s all it took to show me a drastic change begin with my hair. It is super healthy and growing now. I am forever grateful for this product! I use this along with the peptide prep shampoo and the regular K18 shampoo and conditioner. Hair rescuer!

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K18Hair PRO

Thank you MJR for your review!

Reviewed by Anne M.
Verified Buyer
I recommend this product
Age
45 - 54
Hair Concern
  • Chemical damage
  • Heat damage
  • Frizz
  • Fragile/brittle hair
  • Dryness
Hair Type
  • Fine/Thin
  • Straight/Wavy
My Results
  • Less Frizz
  • Bouncy Hair
  • Visible Difference
  • Stronger Hair
  • Less Breakage
Rated 5 out of 5
Review posted

Review

This is the best product I could’ve ever got.

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K18Hair PRO

Thank you for your review!

Reviewed by Tina R.
I recommend this product
Age
25 - 34
Hair Concern
  • Chemical damage
  • Heat damage
  • Frizz
  • Fragile/brittle hair
  • Oily hair/scalp
Hair Type
  • Medium Density
  • Straight/Wavy
My Results
  • Less Frizz
  • Visible Difference
  • Less Breakage
  • Soft Touchable Hair
Rated 5 out of 5
Review posted

Amazingggg

I did the mini to test it, and let me tell you I’m ordering the bigger size now I did the mini because it’s so expensive and I didn’t want to pay tons of money for it not to work but this stuff does the job for sure I’m a blond girl and I love my blond but my hair has gotten weak now I see the difference. This day 4 of using this product. I did my bleach touch up Friday and it was gummy from the ends and breaking so I cut what I could with out losing all my hair started to use K18 and this is where we are !!!! It’s a must

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K18Hair PRO

Thank you Tina for your review! Our molecular repair is a progressive treatment! You will notice your hair will get better with each use.

Reviewed by Lauren M.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Fragile/brittle hair
  • Split-Ends
Hair Type
  • Fine/Thin
My Results
  • Stronger Hair
  • Soft Touchable Hair
  • Smoother Hair
  • Less Breakage
Rated 5 out of 5
Review posted

Notice change after one use!

Miracle treatment

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K18Hair PRO

Thank you Lauren for your review!

Reviewed by Ann L.
Verified Buyer
I recommend this product
Age
55 - 64
Hair Concern
  • Color-care
Hair Type
  • Straight/Wavy
  • Curly/Coily
My Results
  • Stronger Hair
  • Defined Curl/Wave Pattern
  • Soft Touchable Hair
  • Shinier Hair
  • Cleaner, fresher hair
Rated 5 out of 5
Review posted

LOVE IT!

I absolutely love how this makes my hair feel. It is so soft and healthy.

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K18Hair PRO

Thank you Ann! Soft and Healthy is the goal!

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