K18 Leave-In Molecular Repair Hair Mask | LovelySkin
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K18 Leave-In Molecular Repair Hair Mask

K18 Leave-In Molecular Repair Hair Mask

 
$75.00
Highlights
  • Heals hair damage with K18Peptide™
  • Ideal after bleaching and chemical services
  • Unique, no-rinse treatment
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Product Overview

K18 Leave-In Molecular Repair Hair Mask is a patented peptide hair mask to reverse damage from hair treatments.

In just four minutes, this professional, salon-grade hair treatment from K18 Biomimetic Hairscience heals damage from bleach, color treatments, styling heat and chemical services. Formulated with a first of it's kind, patented oligopeptide, also known as K18Peptide™, this bioactive treatment reduces split ends, breakage and color fade, while restoring elasticity, bounce, softness and strength. Unlike conditioning treatments that hydrate the outer layer of hair and bonding treatments that wash out over time, this K18 hair product actually heals hair from the inside out and produces results that won't wash away.

Key Features:

  • K18Peptide™, a unique patented peptide molecule, repairs broken keratin chains that make up the building blocks of hair
  • Heals damage from bleach, color, chemical services, heat, and mechanical styling
  • pH balance of 5.0-6.0
  • Doesn't wash away with shampoo, leaving lasting results
  • Vegan, color-safe and cruelty-free
  • Ideal for all hair types

Restore bounce, elasticity and hydration to damaged hair with K18 Leave-In Molecular Repair Hair Mask.

Highlights

  • Heals hair damage with K18Peptide™
  • Ideal after bleaching and chemical services
  • Unique, no-rinse treatment

Ingredients

Directions

Shampoo, do not condition. Towel dry hair thoroughly.

Begin with 1 pump of K18 Mask and add more as needed depending on the length, thickness, and condition. Work evenly into hair, one pump at a time, from ends to roots.

Let mask sit for 4 minutes to activate. DO NOT add any leave-in or styling products during the 4 minute activation. Do not rinse out. Style as usual after 4 minute activation is over.

K18 is designed to be used consecutively for 6 washes and then every 3-4 washes to maintain your healthiest hair possible.

Shipping & Returns

Free U.S. Shipping. Period. View Our Shipping Policy

Return Policy: This product is non-returnable

Return Policy: View Our Return Policy

Special Shipping Requirements: ORM-D Class
ORM-D classified products such as aerosol sprays, nail polish, perfume and products with high alcohol content may only be shipped using a ground method within the Continental US.

Availability: In stock & ready to ship! .

Questions & Answers (3)

Submit your question about this product to our talented team of Customer Care Representatives, and we'll get back to you as soon as possible!


Answered Questions (3)

How do I use the K18 hair mask?

First, take a shower where you shampoo, but don’t condition your hair. Then, towel dry thoroughly. Begin with one pump of mask and apply it to your hair, adding in more as needed. Work evenly into hair from ends to roots, one pump at a time. Let it sit for four minutes to activate. Don't rinse it out. Then, you can style your hair as usual.

What is K18?

K18 is a leave-in treatment mask that counteracts damage. It uses patented peptide technology to restore broken keratin chains in strands to leave hair feeling softer, stronger and smoother.

After the 4 minutes, can I add styling products before blow-dry? Thank you for your answer

Thank you for your question. After you wait the required 4 minutes, you are able to follow with your favorite styling products and style as normal, including using heat tools.

Product Specifications

About the Brand

K18 Hair Biomimetic Hairscience.

K18 Hair Biomimetic Hairscience.

K18 Biomimetic Hairscience offers some of the best hair repair products to professionally heal and repair damaged keratin bonds from bleaching, chemical treatments and excessive styling. Formulated with a unique, patented molecule called K18Peptide™, this treatment carries amino acids into the cortex of hair to reconnect the keratin chain and re-conform disulfide bonds, bringing damaged, dry hair back to life.

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Customer Reviews (481)

Overall Rating

4.4
Based on 481 reviews

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481 Reviews

Profile picture of SaraR.

SaraR

Verified Purchase

February 13, 2025

For the impatient..your new bff

This is a perfect way to dramatically improve your hair without having to sit through a traditional hair mask that you have to leave in for 15-20 min and rinse out. All it takes is a few sprays ( for my shoulder length hair) after you get out of the shower and wait 4 min while you do other things .. and you are all set! I spray one spritz at a time into my palms (2 total) and work it into sections of my hair for even distribution. It takes less product than you think so a bottle lasts awhile. It even shortens your shower times since you don’t use a conditioner prior. I’m 48, and my highlighted hair is starting to look as healthy as it did in my 30’s. My husband told me yesterday that my hair looked “bouncy”.. and I didn’t even know that word was in his vocabulary. Buy this- it works .

0 people found this helpful

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EmilyW007

Verified Purchase

December 03, 2024

I’m a believer

I was so skeptical of this stuff but I finally tried it and… I’m sold. It has helped repair lots of damage from coloring over the years. After learning about how it actually works, it makes sense! Super easy to use as well.

0 people found this helpful

Profile picture of Teacherkh.

Teacherkh

Verified Purchase

July 20, 2024

Good results

So far this is my favorite special treatment. I feel like it improves my hair annd I like that you don’t need to rinse it. Time saver.

0 people found this helpful

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LovelySkin Customer

Verified Purchase

July 19, 2024

Love

I love this! It has helped my hair to not break and because of that my hair has been able to grow out quickly. Have repurchased several times and will continue to do so.

0 people found this helpful

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LovelySkin Customer

Verified Purchase

July 15, 2024

Amazing

My hairdresser recommended this mask and I am very pleased. Amazing product will definitely buy it again. Game changer.

0 people found this helpful

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LovelySkin Customer

Verified Purchase

July 12, 2024

NEEDED

I get my hair bleached and this is a must.

0 people found this helpful

Profile picture of Beth1313.

Beth1313

Verified Purchase

June 26, 2024

Best thing I’ve ever purchased for my hair

I will never not use this product. I use it after every wash and my hair has never been healthier. Holy grail product for me.

0 people found this helpful

Profile picture of HarmonyZ.

HarmonyZ

Verified Purchase

March 04, 2024

Doesn’t make thin hair greasy

I used this product according to the label and it’s working great. I have fine/thin hair and it’s not weighed down at all. I use 1 to 2 pumps each time I use it. I can see less breakage where I wear my hair tie.

0 people found this helpful

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LovelySkin Customer

Verified Purchase

February 27, 2024

One of The Best Products for Damaged Hair

k18 is one of the best products in the market for damaged hair. If you have highlighted, double processed or heat styled hair, you need this product. Make sure to apply it on towel dry hair, not to use conditioner prior, and to wait the indicated time prior to proceeding with other products or styling. This doesn't replace protein treatments, other bond repair products or serums. K18 works in a totally different way to heal damaged hair and makes a great addition to your monthly hair routine.

0 people found this helpful

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LovelySkin Customer

Verified Purchase

February 01, 2024

Happy!

After following instructions I am now down to maintenance treatments. I do notice a difference in my hair after using product. I do follow with conditioner and am happy with the results.

0 people found this helpful

Profile picture of Skinlove.

Skinlove

Verified Purchase

January 31, 2024

Ease of Application

I like this product when I'm in a time crunch - I don't have to apply conditioner (in fact you aren't supposed to) and then I apply this. There is no waiting or applying to damp hair before showering that some other products require. It hasn't been life changing in terms of impact to my hair but my hair is relatively healthy but the ease of application is superb.

0 people found this helpful

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LovelySkin Customer

Verified Purchase

January 03, 2024

Love

I have dry and damaged hair, this product is making me like my poor hair again.

0 people found this helpful

Profile picture of Hurley.

Hurley

Verified Purchase

December 01, 2023

LOVE

This is the only hair repair treatment I’ve used that I’ve actually seen and felt a difference in my hair. Wish it came in a bigger size than 1.7 oz though.

0 people found this helpful

Profile picture of Zippy123.

Zippy123

Verified Purchase

November 24, 2023

No Stars Should Be An Option

Hate it. Did damage to my hair, I saw zero improvement and more damage. I gave it away and returned to a less expensive brand which I never should have strayed from.

0 people found this helpful

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LovelySkin Customer

Verified Purchase

November 20, 2023

Great treatment, but can't tell if it's working

My hair did feel stronger after going through a whole bottle, but I'm not sure it really repaired my hair. That being said, I have virgin hair (hasn't ever been colored), and I don't heat style my hair. It's a great gift I think.

0 people found this helpful

Profile picture of Fanchera.

Fanchera

Verified Purchase

November 09, 2023

Worth it

I started using this a little over a year ago. I use it once a week and it lasts me about 3 months. I have long hair and I’ve noticed a lot less breakage which has allowed me to go longer between hair trimming. I’m 48 and my hair hasn’t been this long since I was 26! Highly recommend!

0 people found this helpful

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LovelySkin Customer

Verified Purchase

September 25, 2023

So worth the price

I purchased this product about 6 months ago, and I still have product left. I have incredibly long hair, and I use the product as directed and it has lasted so long. I have noticed an improvement in the breakage and frizziness of my hair and plan to continue using!

0 people found this helpful

Profile picture of Mmm11y.

Mmm11y

Verified Purchase

September 06, 2023

Good Product

I do like this hair mask. But it does require about 9 pumps of it. It says to start out with 3 but thats definitely not enough. Especially after not using conditioner in the shower. It’s rough on the hair when you are putting it on but I do see a difference in using it.

0 people found this helpful

Profile picture of EmilyIm.

EmilyIm

Verified Purchase

August 12, 2023

best treatment help hair

this is the best product for hair i used to use many product for hair but this is really repair my hair and easy to use i really love it and worth to try

0 people found this helpful

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LovelySkin Customer

Verified Purchase

August 06, 2023

Must have for damaged hair

My highlighted hair is frizzy and prone to split ends. My stylist recommended this product to me as she uses the system in her salon. My hair feels stronger and softer after using this.

0 people found this helpful

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