K18 Leave In Molecular Repair Hair Mask 50Ml

€60.00

Bestseller
Code 0858511001128

4-minute leave-in treatment to clinically reverse hair damage

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Product Information

An at-home leave-in treatment infused with our patented K18Peptide™ that works to repair even the most extreme damage, renewing hair to its most youthful, healthy state.

REPAIRS DAMAGE CAUSED BY:

  • Bleach + Color
  • Heat
  • Chemical Services

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.


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

91% original strength*

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.


How to Use This Product

 IN the shower

  1. Shampoo, do not condition.

OUT of the shower

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

Ingredients Disclaimer

CH Tralee is dedicated to maintaining the accuracy of the ingredient lists on this website. However, because ingredients are subject to change, we cannot guarantee that these lists are complete, up-to-date and/or error-free. For an accurate listing of ingredients in each product, please refer to your product packaging.

Delivery Info

CH Tralee provide FREE delivery in the Republic of Ireland when you spend €40 or more.

FREE Click & Collect from 31 The Mall, Tralee. You will not be charged for this service. Please allow at least 48 hours for collection, you will be notified by email when your order is ready for collection.

We are delighted to offer you the ability to shop online and choose either delivery (Ireland & UK) or to collect in-store if you are close to us in Kerry.

Find out more about our Delivery & Collection services??

Returns Policy

We want you to be completely satisfied with your order and we would hope to resolve any problems you may have. If you are unhappy with your purchase, we will exchange or refund the item or issue a credit note, providing the goods are not damaged and all packaging is still intact.

Terms and conditions apply.

Please view our full Returns Policy for further information

Click to view complete product details

Related Products




1. What is K18?

An at-home, leave-in treatment infused with our patented K18Peptide™ that works on a molecular level to repair even the most extreme damage. Hair is left with the strength, softness, smoothness, and bounce of hair like new. Bonus: Concentrated formula ensures a little goes a long way. The K18Peptide™ is the patented molecular breakthrough clinically proven to reverse hair damage (in just 4 minutes) from:

  • bleaching and colouring
  • chemical hair treatments 
  • bleach

2.  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 into the inner-most layers of hair to reach the core polypeptide chains (keratin chains), our revolutionary K18Peptide™ is just the right size and makeup to fit in and reconnect broken keratin chains. Our peptide employs 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.

3. What is 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.

4. Does K18 wash out of your hair?

K18 mimics the natural keratin building blocks in hair, so it’s recognized as natural instead of a facilitated bond and won’t wash out. Our peptide’s strengthening and smoothing results are clinically proven to remain in hair, even after shampoo.

5. Will K18 weigh my hair down?

Because K18 penetrates hair, traveling deep into the inner layers to repair broken polypeptide chains (keratin chains), product won’t be left sitting on the top layers of hair like traditional styling products. Hair will be left feeling clean and light. 

6. What happens if I apply styling products before the K18 Mask 4-minute processing time is up?

4 minutes is the optimal amount of time it takes our K18Peptide™ to reach hair’s inner structure. To provide the clearest path for the peptide to penetrate, other products should be applied after K18 has reached the polypeptide chains. 

7. 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. 

8. Why do you need to leave K18 Mask in?

K18 mimics the natural keratin building blocks in hair, so it’s recognized as natural instead of a facilitated bond and won’t wash out. K18 acts as the missing puzzle piece to reconnect broken polypeptide chains (keratin chains) therefore it needs to stay in to maintain the link that is contributing to the renewal of hair’s core strength and elasticity. 

9. Has K18 been clinically tested?

K18Peptide™ is the patented molecular breakthrough clinically proven to reverse hair damage (in just 4 minutes) from:

  • Bleach + Color 
  • Chemical Services 
  • Heat 

10. Is K18 Safe to use during pregnancy? What about allergies?

We recommend consulting with your doctor before using K18 during pregnancy or if you are concerned about specific allergies. 

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