Before and After Results for Coily Hair K18 Treatment

Before and After Results for K18 with Balayage

Before and After Results for Wavy Hair with K18 Treatment

Before and After Results for K18 treatment

leave-in molecular repair hair mask

4-minute leave-in treatment to reverse hair damage

Rated 4.7 out of 5

Based on 3260 reviews

A leave-in treatment mask for all hair types that clinically reverses damage in 4 minutes. The patented peptide technology works to repair damage from bleach, color, chemical services & heat – restoring strength, softness, smoothness, and bounce to hair.

K18 products are Certified Plastic Neutral by Plastic Bank.

Repairs Damage Caused By

Bleach + Color
Heat
Chemical Services

Full Size - $75.00 50 mL Travel Size - $29.00 15 mL Try-it Size - $12.00 5 mL

FREE SHIPPING. FREE RETURNS.

more to know

creates hair like new

Traveling deeper into the inner layers of hair than traditional repair products, our revolutionary patented K18Peptide™ is just the right size and makeup to fit in and reconnect broken keratin chains, renewing hair with strength, softness, smoothness, and bounce. You can feel and see the difference with the first use.

See dosage chart for exact usage. For best results, use for the first 4-6 consecutive washes, then every 3-4 washes as needed to maintain hair strength.

how to use

IN the shower

Shampoo, do not condition.

OUT of the shower

Towel dry thoroughly.
Begin with 1 pump of the K18 Mask and add more as needed depending on the length, thickness, and condition.
Work evenly into hair from ends to roots, one pump at a time.
Let sit for 4 minutes to activate.
Do NOT rinse out.
Style as usual.

do's + don'ts

DO use a clarifying shampoo if you’re a heavy product or dry shampoo user to remove buildup and help our peptide penetrate and get where it needs to go.
DO wait the full 4 minutes before styling or applying other product
DO use every 4-6 shampoos consecutively to see and feel ongoing results

DON’T condition your hair before application (trust us, most won’t need it after K18, if you still need, add a leave-in after the 4-minute window is up post-application)
DON’T overuse, a little goes a long way.
DON’T rinse out. This is a leave-in, so you know, leave it in!

key benefits

Our K18Peptide™ is clinically proven to reverse damage in just 4 minutes.

Heals damage from bleach, color, chemical services, and heat
Restores strength, softness, smoothness, and bounce
Doesn’t wash away with shampoo, leaving lasting results
Vegan, color-safe, cruelty-free

up to 91% original strength*
up to 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

K18 products are Certified Plastic Neutral by Plastic Bank.

what you can expect
by damage type

backed by science,
loved by stylists

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

“K18 allows me to go everywhere I want to go with my color work and the end result is my guests get to be bright and shiny and healthy.”

– Christine Thompson, Director of Color at Spoke & Weal

have questions?

we have answers.

How does K18 work?

When hair gets damaged, the polypeptide chains (keratin chains) that make up the inner structure of hair strands become weakened and break. For context, there are billions and billions of polypeptide chains (keratin chains) in a single strand of hair. When these are damaged, hair’s core structure responsible for elasticity and strength becomes compromised and as a result it loses its resiliency and shine—or the look and feel of healthy hair.

After spending a decade in the lab scanning and testing all amino acid sequences across the entire keratin genome that makes up human hair searching for a breakthrough, we discovered one unique sequence (a bioactive peptide) that brings damaged hair back to its original, youthful state. This is our K18Peptide™.

Traveling deeper into the inner layers of hair than traditional repair products, our revolutionary peptide is just the right size and makeup to fit in and reconnect those broken polypeptide chains (keratin chains). And because our peptide is a bit of an overachiever, as a result of this reconnection, any disturbed disulfide bonds are also re-conformed.

Our peptideemploys biomimetics to get the job done. To put it simply: Biomimetics is the practice of learning from and mimicking nature. Mimicking the natural structure of keratin building blocks (amino acid sequences), our K18 bioactive peptide is recognized as natural by the hair. It’s not washed away by water or shampoo like traditional bonding agents either, making K18 a genuine, lasting solution for damaged strands.

What is the K18Peptide™?

Our patented peptide is a unique sequence of amino acids that travels deep into hair’s core structure to fit in and reconnect broken polypeptide chains (keratin chains) responsible for hair strength and elasticity.

An Analogy: When building proteins, the order of the amino acids determines the kind of protein and its properties, much like the way letters are arranged to make meaningful words and sentences. In the same way the order and where each word sits in a sentence leads to its overall meaning, K18 is the magic word that fits right in, integrating itself with the keratin chains as the hair recognizes it as a natural building block.

Why should I skip conditioner?

K18 is most effective on clean, towel-dried hair. Conditioners use silicones and conditioning agents that form heavy coatings on hair , preventing our peptide from reaching the broken polypeptide chains deep inside hair’s inner layer.

I noticed there’s alcohol in the formula, isn’t that bad for you?

We like to keep our formulas minimal, only using the exact amount of ingredients needed to get the peptide where it needs to go. Our unique blend of 3 alcohols function to open up the hair cuticle so the K18Peptide ™ can penetrate the inner most layer of hair, reaching the broken polypeptide chains (keratinchains). Here the alcohol serves as an agent to optimize the hair environment for K18 to work on a deeper level.

When should I expect to see results?

You will start to see stronger, softer, healthier hair after just one use.

original strength*

original elasticity*

with just one salon treatment, hair is restored up to

* 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.

when using K18 mist and mask as part of a bleaching treatment

*Results observed in a clinical study. Results may vary depending on hair type, quality, and history.

the more damaged the hair, the more dramatic the results

*Results observed in a clinical study. Results may vary depending on hair type, quality, and history.

Renews strength, softness, smoothness, and bounce

Curly
Coily
Straight

K18 strengthens hair’s core structure, restoring damaged curl patterns and leaving strands looking and feeling like new.

K18 reconnects broken keratin chains, restoring hairs elasticity and strength meaning coily hair can be renewed and brought back to its original springy, healthy shape.

K18 restores strength, softness, smoothness, and bounce so even the sleekest hair can feel like new.

Reviews

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average rating 4.7 out of 5

Based on 3260 reviews

5 Stars

2716 Reviews
4 Stars

321 Reviews
3 Stars

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2 Stars

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1 Star

57 Reviews

94% of reviewers would recommend this product to a friend

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Reviewed by KAREN K.

Verified Buyer

Reviewing

Leave-In Molecular Repair Hair Mask 5mL

I recommend this product

Age

35 - 44

Hair Concern

Fragile/brittle hair
Chemical damage
Split-Ends

Hair Type

Medium Density

My Results

Less Breakage

Rated 5 out of 5

Review posted

Helped my hair

This mask helped repair my hair! I liked it more than Olaplex.

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Reviewed by Marianne H.

Verified Buyer

Reviewing

Leave-In Molecular Repair Hair Mask 15 mL

I recommend this product

Age

35 - 44

Hair Concern

Chemical damage
Heat damage
Dryness

Hair Type

Fine/Thin

My Results

Less Frizz
Visible Difference
Stronger Hair
Smoother Hair
Soft Touchable Hair

Rated 5 out of 5

Review posted

Love It

I’ve used this 3 times now and have noticed a HUGE difference in my hair. I absolutely love it and will buy again

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Reviewed by Kelly H.

Verified Buyer

Reviewing

Leave-In Molecular Repair Hair Mask 15 mL

I recommend this product

Age

45 - 54

Hair Concern

Fragile/brittle hair

Hair Type

Fine/Thin

My Results

Visible Difference
Smoother Hair

Rated 5 out of 5

Review posted

Noticeable improvement with 1 use

For an unknown reason my hair had broken off near the crown. It was difficult to style or to even put in a ponytail. I have tried many remedies, but K18 is the only one that I noticed an improvement with use.

As my hair is hopefully growing out I will continue to use K18 to manage the damage.

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Reviewed by Jeannine C.

Verified Buyer

Reviewing

Leave-In Molecular Repair Hair Mask 50mL

I recommend this product

Age

45 - 54

Hair Concern

Split-Ends
Heat damage
Color-care
Fragile/brittle hair
Dryness

Hair Type

Fine/Thin
Curly/Coily

My Results

Stronger Hair
Less Breakage
Shinier Hair
Less Frizz
Visible Difference

Rated 5 out of 5

Review posted

Best hair saver ever!!

Due to the pandemic I felt like my hair was thinning. I have color treated hair so it’s really important that I do all that I can to prevent breakage. So I began a hair recovery journey by purchasing shampoo’s, scalp treatments, eating healthy and taking vitamins to help with the regrowth of my hair. Adding K18 has been truly a game changer. I’m truly enjoying the immediate results that I see each time I use this product. Keep doing what your doing K18 team you are hair savers for sure!!!

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Reviewed by Cynthia D.

Verified Buyer

Reviewing

Leave-In Molecular Repair Hair Mask 50mL

I recommend this product

Age

55 - 64

Hair Concern

Chemical damage
Frizz
Dryness

Hair Type

Fine/Thin

My Results

Less Frizz
Visible Difference
Stronger Hair
Shinier Hair

Rated 5 out of 5

Review posted

Recovery from years of bleach

This is the product that has taken the last several inches of my hair from “straw” and frizz to healthy and shiny. You will notice a difference right away!

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