healthier hair + scalp after just one wash

clarify hair + scalp - just one wash removes 99% product buildup, 95% sebum + 76% copper*

*clinically proven to reverse damage from bleach + color, chemical services, heat

one use of molecular repair hair oil delivers* clinically proven damage repair, 24 hour frizz control, 104% more shine, 78% reduction in split ends, 450F heat protection

78% reduction in split ends* - image shows before and after of blonde hair with a k18 in-salon routine + oil

damage repair starter set

Limited-edition set repairs damage + reduces frizz

Rated 4.9 out of 5

Based on 11 reviews

Jump start your client’s healthy hair routine with this science-powered, 3-step set.

PEPTIDE PREP™ detox shampoo removes buildup + metals for maximum molecular repair results.
Our bestselling leave-in molecular repair hair mask reverses damage in 4 minutes.
The molecular repair hair oil fights frizz from within for immediate + long-term frizz control.

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In 2023 we stopped147 Metric tons of plastic

7.3M+ single-use plastic bottles from reaching the ocean

more to know

This science-powered set delivers cleaner, healthier, and frizz-free hair.

Start with our color-safe mini detox shampoo to clear product buildup, excess oil, and metals from hard water. Follow with the bestselling leave-in molecular repair hair mask—powered by the K18PEPTIDE™ and clinically proven to reverse damage from bleach + color, chemical services, and heat* in 4 minutes. Finish with the mini oil, a strengthening defrizz solution that softens, adds shine, reduces split ends, and provides 450°F (232°C) heat protection*.

*Disclaimers

key benefits

Just one use of PEPTIDE PREP™ detox shampoo removes*:
99% of product buildup
95% of sebum
76% of copper

One use of leave-in molecular repair hair mask delivers*: Healthier hair in 4 minutes

One use of molecular repair hair oil delivers*:
Clinically proven damage repair
24-HR frizz control
104% more shine
78% reduction in split ends
450°F (232°C) heat protection

*Disclaimers

how to use

Begin with detox shampoo

Massage detox shampoo into hair + scalp to remove excess buildup.
Thoroughly rinse.
Repeat as needed.
Skip conditioner.

Apply the leave-in molecular repair hair mask

Towel-dry thoroughly
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
Let sit for 4 minutes. Do not rinse out

Finish with the molecular repair hair oil:

Apply 1-3 drops of molecular repair hair oil to damp hair, starting at the ends and working upward through the mid-lengths.
Wait 4 minutes. Style as usual.
Apply an additional 1-3 drops of molecular repair hair oil to dry hair as a finisher.
A little goes a long way with our highly concentrated formulas. Start with the minimum recommended amount + build as needed.

ingredients

PEPTIDE PREP™ detox shampoo
Water (Aqua) (Eau), Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Hydroxysultaine, Salicylic Acid, Charcoal Powder, sh-Oligopeptide-78, Panthenol, Glycerin, Sodium Phytate, GuarHydroxypropyltrimonium Chloride, Caprylyl Glycol, Caprylhydroxamic Acid, Citric Acid, Potassium Hydroxide, Sodium Hydroxide, Fragrance (Parfum), Benzyl Salicylate, Limonene.

leave-in molecular repair hair mask
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.

molecular repair hair oil
Caprylyl Caprylate/Caprate, Squalane, Persea Gratissima (Avocado) Oil, Helianthus Annuus (Sunflower) Oil, C13-15 Alkane, Undecane, Benzyl Alcohol, Tridecane, Castor Isostearate

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

Description

Jump start your client’s healthy hair routine with this science-powered, 3-step set.

PEPTIDE PREP™ detox shampoo removes buildup + metals for maximum molecular repair results.
Our bestselling leave-in molecular repair hair mask reverses damage in 4 minutes.
The molecular repair hair oil fights frizz from within for immediate + long-term frizz control.

got questions?

Get started here

Is it better to recommend the full K18 routine?

Yes, it is better to recommend the full K18 routine for your client’s cleanest, healthiest hair and optimal molecular repair results. Before the mask and oil, our PEPTIDE PREP™ category tackles every kind of buildup to create their cleanest, healthiest hair canvas. With our molecular repair formulas, they get maximum damage repair plus additional styling benefits with the oil. Your clients can use the K18 routine at home to keep their healthy hair going in-between appointments.

Will the detox shampoo dry my client's hair out?

No, the detox shampoo will not dry your client’s hair out. This non-stripping formula has a pH of 3.8-4.2 that won’t leave hair over-stripped. In a consumer study, 90%* said hair feels clean without feeling dry. *Disclaimers

How do the molecular repair hair mask and oil work together?

The molecular repair hair mask and oil work together to give you the reparative benefits of the K18PEPTIDE™ in both formulas. The oil will add additional frizz-reducing, styling, and heat-protecting properties. You can layer the oil on top of the mask after the 4-minute processing time.

Will the mask block the molecular repair hair oil from penetrating?

No, the mask will not block the molecular repair hair oil from penetrating. The mask is a highly concentrated treatment without any fillers so it won’t block the oil from penetrating. Like layering different skincare products, the oil can be layered on top of the mask without impacting its performance.

Is the K18PEPTIDE™ in every K18 product?

K18 molecular repair + PEPTIDE PREP™ shampoo are formulated with the K18PEPTIDE™. In our molecular repair products, the peptide works at the innermost layers to reverse hair damage. In our PEPTIDE PREP™ shampoo, the peptide helps reduce protein loss to help keep hair feeling healthy and strong.

your client’s healthiest hair in 3 steps

detox

1. Massage detox shampoo into hair + scalp to remove excess buildup.
2. Thoroughly rinse.
3. Repeat as needed.
4. Skip conditioner.
repair

1. Towel-dry thoroughly.
2. Begin with 3 pumps of K18 mask and add more as needed. Maximum recommended usage is 9 pumps.
3. Apply all over, 1 pump at a time.
4. Let sit for 4 minutes. Do not rinse out.
fight frizz

1. Apply 1-3 drops of molecular repair hair oil to damp hair, starting at the ends and working upward through the mid-lengths.
2. Wait 4 minutes. Style as usual.
3. Apply an additional 1-3 drops of molecular repair hair oil to dry hair as a finisher.

A little goes a long way with our highly concentrated formulas. Start with the minimum recommended amount + build as needed.

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free shipping on $125+ orders

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real support

We have K18 experts on standby to answer allll your product and order questions.

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

Write a Review

average rating 4.9 out of 5

Based on 11 reviews

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100% of reviewers would recommend this product to a friend

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Reviewed by Eileen

Verified Reviewer

I recommend this product

Age

65+

Hair Concern

Extending time between washes

Hair Type

Medium Density
Grey Hair

My Results

Visible Difference
Stronger Hair
Shinier Hair
Soft Touchable Hair
Smoother Hair

Rated 5 out of 5

Review posted

You’re NOT dreaming!

In my 66+ years I’ve never been able to just wash my hair in the shower & only utilize 1 product, and be left with the silkiest, shiniest, healthiest hair EVER! It’s totally changed my routine, but more importantly, I can continue to keep my long, single process hair in the best condition it’s ever known! I recommend it to all of my clients, as I’m living proof of the results!

Was this helpful?

K18Hair PRO

Thank you Eileen! We appreciate your review and referrals!

Reviewed by Meghan B.

Verified Buyer

I recommend this product

Age

35 - 44

Client Hair Concerns

Chemical Damage
Heat Damage
Color Care
Frizz
Split Ends

Client Hair Types

Medium Density

Client Results

Stronger hair
Less Breakage
Soft Touchable Hair
Shinier Hair
Visible Difference

Rated 5 out of 5

Review posted

Perfect for clients

Love this take home kit for my clients! This allows them to continue to repair their hair at home so when they return to the salon their hair is in optimal condition for processing. The detox shampoo leaves your hair and scalp feeling cleansed and nourished, the mask is creamy and luxurious. I like to use the oil prior to drying and also a couple drops after for softness.

Was this helpful?

K18Hair PRO

You are a rockstar Meghan! Looking out for healthy hair for your clients! Thank you for your review!

Reviewed by Kelly W.

Verified Buyer

I recommend this product

Age

45 - 54

Client Hair Concerns

Heat Damage
Split Ends
Dryness
Oily hair/scalp
Fragile/Brittle Hair

Client Hair Types

Thick/Coarse
Medium Density
Curly/Coily
Grey Hair
Straight/Wavy

Client Results

Cleaner, fresher hair
Visible Difference
Stronger hair
Shinier Hair
Smoother Hair

Rated 5 out of 5

Review posted

Healthier hair journeys start here

It’s ez to use & makes the hair feel silky soft

Was this helpful?

K18Hair PRO

Welcome to the healthy hair journey! Thank you Kelly for your review!

Reviewed by Brittany A.

Verified Buyer

I recommend this product

Age

35 - 44

Client Hair Concerns

Heat Damage
Frizz
Split Ends
Dryness
Color Care

Client Hair Types

Fine/Thin
Curly/Coily

Client Results

Less Frizz
Less Breakage
Soft Touchable Hair
Shinier Hair
Visible Difference

Rated 5 out of 5

Review posted

My hair feels so soft and silky! And is growing so fast

Love it! So shiny

Was this helpful?

K18Hair PRO

Thank you for your review!

Reviewed by Kelly B.

Verified Buyer

I recommend this product

Age

35 - 44

Client Hair Concerns

Dryness

Client Hair Types

Medium Density

Client Results

Smoother Hair
Shinier Hair
Visible Difference

Rated 5 out of 5

Review posted

New product purchase

Love it. The new oil is exactly what I was looking for.

Was this helpful?

K18Hair PRO

Thank you Kelly!

damage repair starter set

Professional Only

more to know

key benefits

how to use

ingredients

professional molecular repair mist 300mL

Description

got questions?

Is it better to recommend the full K18 routine?

Will the detox shampoo dry my client's hair out?

How do the molecular repair hair mask and oil work together?

Will the mask block the molecular repair hair oil from penetrating?

Is the K18PEPTIDE™ in every K18 product?

exclusive tools

free shipping on $125+ orders

real support

how molecular repair compares

how K18 works

reviews

You’re NOT dreaming!

K18Hair PRO

Perfect for clients

K18Hair PRO

Healthier hair journeys start here

K18Hair PRO

My hair feels so soft and silky! And is growing so fast

K18Hair PRO

New product purchase

K18Hair PRO

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