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full-size leave-in molecular repair hair mask

Retail size of our 4-minute leave-in treatment to reverse hair damage
Rated 4.8 out of 5
Based on 1574 reviews

A retail-sized version of the K18 mask helps to maintain your client's hair strength and elasticity in-between salon appointments. This leave-in treatment mask for all hair types that reverses damage in 4 minutes. Patented peptide technology works to repair damage from bleach + color, chemical services, and heat* — restoring strength, softness, smoothness, and bounce to hair.

20+ billion TikTok views 🔥 

*Disclaimers

Repairs Damage Caused By

  • Bleach + Color
  • Heat
  • Chemical Services

Professional Only

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more to know

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 from even extreme damage - 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

Simplified repair - convenient, leave-in formula works in just 4 minutes, with no extra rinse required

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

key benefits

  • K18PEPTIDE™ is a biotech-developed peptide that mimics hair's structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during bleaching, 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

how to use

  1. Shampoo, do not condition. Towel-dry thoroughly
  2. 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
  3. Let sit for 4 minutes. Do not rinse out
  4. Comb, add product + style as usual. Use for 4-6 washes post-salon service, then as needed

dos and don'ts

  • DO clarify before K18 if your client is a heavy product user (demineralize for mineral + metal buildup)
  • DO apply on clean, damp hair
  • 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

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.

pairs well with

molecular repair hair oil

Rated 4.8 out of 5
Based on 273 reviews
Weightless oil that strengthens, repairs damage + reduces frizz View Molecular Repair Hair Oil (WHOLESALE) product Log In / REGISTER

PEPTIDE PREP™ detox shampoo

Rated 4.8 out of 5
Based on 191 reviews
Retail size of our color-safe, non-stripping clarifying shampoo formulated with the K18PEPTIDE™ View PEPTIDE PREP™ detox shampoo 8.5oz (WHOLESALE) product Log In / REGISTER

Description

A retail-sized version of the K18 mask helps to maintain your client's hair strength and elasticity in-between salon appointments. This leave-in treatment mask for all hair types that reverses damage in 4 minutes. Patented peptide technology works to repair damage from bleach + color, chemical services, and heat* — restoring strength, softness, smoothness, and bounce to hair.

20+ billion TikTok views 🔥 

*Disclaimers

got questions?

Get started here

who is it for?

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

why skip conditioner?

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.

why do I use K18 mask on towel-dried hair?

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.

does K18 mask replace conditioner?

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.

Is the K18 pro mask and take-home mask the same?

Yes, both formulas are the same. The PRO mask is conveniently sized for PRO use.
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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 4.8 out of 5
Based on 1574 reviews
  • 5 Stars
    1430 Reviews
  • 4 Stars
    83 Reviews
  • 3 Stars
    34 Reviews
  • 2 Stars
    8 Reviews
  • 1 Star
    19 Reviews
96% of reviewers would recommend this product to a friend
Customer photos and videos
1574 Reviews
Reviewed by Miranda W.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Oily hair/scalp
  • Color-care
  • Frizz
Hair Type
  • Fine/Thin
My Results
  • Visible Difference
  • Soft Touchable Hair
  • Cleaner, fresher hair
  • Shinier Hair
  • Smoother Hair
Rated 5 out of 5
Review posted

My HOLY GRAIL!!!

I cannot fathom going without this EVER AGAIN.

Me new neighbor’s niece is a stylist and raves about this product. I had recently had my hair bleached and it was feeling like, well, it had been bleached! Initially I tried my “leave on 20min” moisturizing hair mask from another brand. It did ok.

I finally bought this - GAME CHANGER!

My hair is much lighter (weight) and smoother and way healthier than EVER before.

I can’t believe I thought I had my hair sorted before this came into my life. Now, my hair is actually living its best life.

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K18Hair PRO

Thank your neighbors niece for us! We appreciate your review Miranda!

Reviewed by Mary N.
Verified Buyer
I recommend this product
Age
55 - 64
Hair Concern
  • Frizz
  • Dryness
  • Split-Ends
Hair Type
  • Thick/Coarse
My Results
  • Less Frizz
  • Smoother Hair
  • Soft Touchable Hair
Rated 5 out of 5
Review posted

Love it

Have to say, the first time I used this product on my frizzy thick hair...I didn't think it was worth the large price. I continued to use it and quickly changed my mind! Love this product!

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K18Hair PRO

Thank you for your review Mary!

Reviewed by Jill B.
Verified Buyer
I recommend this product
Age
45 - 54
Hair Concern
  • Fragile/brittle hair
  • Dryness
Hair Type
  • Fine/Thin
My Results
  • Less Frizz
  • Visible Difference
  • Stronger Hair
  • Defined Curl/Wave Pattern
  • Smoother Hair
Rated 5 out of 5
Review posted

Absolute miracle

This product is amazing! Well worth the price for me.my hair is so soft now and my curl’s moisturized and frizz free. I would highly recommend this product…

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K18Hair PRO

Thank you Jill! Enjoy your hydrated curls! ;)

Reviewed by Nancy M.
Verified Buyer
I recommend this product
Age
65+
Hair Concern
  • Chemical damage
  • Fragile/brittle hair
  • Dryness
Hair Type
  • Fine/Thin
My Results
  • Less Frizz
  • Less Breakage
  • Soft Touchable Hair
Rated 5 out of 5
Review posted

Really softens and strengthens hait

I’ve used the travel version so got the larger one. Use about 1-2 x / week. I think has helped my hair. It does seem a bit flat by day 2-3.

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K18Hair PRO

Thank you Nancy for your review!

Reviewed by GINA N.
Verified Buyer
I recommend this product
Age
55 - 64
Hair Concern
  • Chemical damage
  • Frizz
Hair Type
  • Medium Density
My Results
  • Less Frizz
  • Stronger Hair
Rated 5 out of 5
Review posted

Repair mask

I love the product my hair has never been healthier

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K18Hair PRO

Your hair is amazing! Thank you for your review Gina!

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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