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mini leave-in molecular repair hair mask

Mini retail size of our 4-minute leave-in treatment to reverse hair damage
Rated 4.8 out of 5
Based on 1340 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.

11+ billion TikTok views 🔥

*Disclaimers

Repairs Damage Caused By

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

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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 3-9 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
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molecular repair hair oil

Rated 4.8 out of 5
Based on 192 reviews
Weightless oil that strengthens, repairs damage + reduces frizz View Molecular Repair Hair Oil (WHOLESALE) product Log In / REGISTER
PEPTIDE PREP™ detox shampoo 8.5oz (WHOLESALE)PEPTIDE PREP™ detox shampoo 8.5oz (WHOLESALE)

PEPTIDE PREP™ detox shampoo

Rated 4.8 out of 5
Based on 150 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.

11+ billion TikTok views 🔥

*Disclaimers
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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.

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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.
reviews
average rating 4.8 out of 5
Based on 1340 reviews
  • 5 Stars
    1221 Reviews
  • 4 Stars
    71 Reviews
  • 3 Stars
    27 Reviews
  • 2 Stars
    8 Reviews
  • 1 Star
    13 Reviews
97% of reviewers would recommend this product to a friend
Customer photos and videos
1340 Reviews
Reviewed by Stephanie R.
Verified Buyer
I recommend this product
Age
45 - 54
Hair Concern
  • Chemical damage
Hair Type
  • Medium Density
  • Curly/Coily
My Results
  • Visible Difference
  • Less Frizz
  • Stronger Hair
  • Soft Touchable Hair
  • Defined Curl/Wave Pattern
Rated 5 out of 5
Review posted

Awesome Product!

I liked it so much that I got a monthly subscription!

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K18Hair PRO

💛 Thank you for your review!

Reviewed by Mary Melissa H.
Verified Buyer
I recommend this product
Age
55 - 64
Hair Concern
  • Frizz
  • Dryness
Hair Type
  • Straight/Wavy
  • Medium Density
My Results
  • Less Frizz
  • Smoother Hair
  • Shinier Hair
  • Soft Touchable Hair
Rated 5 out of 5
Review posted

Long frizzy hair

My hair stylist used this on my hair and it turned out so smooth and soft. Of course I had to buy it and try it at home. I can never get it as smooth as he does but with this product you’d think I’d been to the salon. Amazing results.

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K18Hair PRO

Thank you Mary Melissa for your review!

Reviewed by Aaron M.
Verified Buyer
I recommend this product
Age
25 - 34
Hair Concern
  • Chemical damage
Hair Type
  • Medium Density
My Results
  • Bouncy Hair
Rated 5 out of 5
Review posted

great

great

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K18Hair PRO

Thank you for your review!

Reviewed by Laura s.
Verified Buyer
Age
55 - 64
Hair Concern
  • Color-care
  • Frizz
  • Fragile/brittle hair
  • Chemical damage
  • Dryness
Hair Type
  • Straight/Wavy
  • Grey Hair
  • Medium Density
Rated 3 out of 5
Review posted

Still waiting for results

I really want this to work. Maybe it does and my hair would be REALLY bad without it. I wash every 3 days using k18 maintenance shampoo, k18 mask, and k18 oil. Day of service photo, and today photo. You decide.

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K18Hair PRO

Thank you for your review Laura. Reach out to us with any questions to Hello@K18hair.com.

Reviewed by Linda D.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Chemical damage
  • Heat damage
  • Color-care
  • Frizz
  • Fragile/brittle hair
Hair Type
  • Thick/Coarse
My Results
  • Less Frizz
  • Bouncy Hair
  • Visible Difference
  • Stronger Hair
  • Less Breakage
Rated 5 out of 5
Review posted

Big Difference

I have noticed a big difference in such little time. I use it daily; a small amount goes a long way. Worth it! I will repurchase it. Co-workers noticed it and asked me, what I am using on my hair, so it is noticeable I wish I would have taken a before picture.

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K18Hair PRO

My favorite is when others notice! Thank you for your review Linda!

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