What Is It:


This at-home leave-in treatment powered by patented K18PeptideTM is clinically proven to
reverse hair damage from bleach + color, chemical services, and heat to renew strength, softness,
smoothness, and bounce.


Our insight:


Hair like new in 4 minutes


How to use:


Traveling deeper into the inner layers of hair than traditional repair products, our revolutionary patented. K18PeptideTM is just the right size and molecular structure to fit in and reconnect broken keratin chains, renewing strength, softness, smoothness, and bounce.

IN the shower
1. Shampoo– a detox shampoo is best to remove any build up if you’re a heavy product user
2. Do NOT Condition (we know a little scary, but trust us you won’t need it) this allows our peptide to penetrate
effectively

OUT of the shower
3. Using a towel, gently dry hair until damp
4. Start with one pump of K18
5. Only add more as needed (this highly concentrated formula means even the most extremely thick, coily hair uses
maximum 3 pumps) Average use is 2 pumps.
6. Work evenly into hair from ends to roots
7. Let sit for 4 minutes to activate. Do NOT rinse out.
8. Style as usual once the 4-minute window is up (this is when you can add a heat protectant or another styler if you
want)


Ingredients:


Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20,sh-Oligopeptide-78 (K18PeptideTM), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol.


Brand info:


We’re on a crusade to liberate haircare. Haircare products have fallen into two categories:
conditioning treatments that coat hair, or repair treatments that work to patch damage, offering
temporary results. Instead of building our brand on buzzwords and beliefs of the past, we took
the radical path of biotech to develop K18 Hair.


What Is It

What Is It:


This at-home leave-in treatment powered by patented K18PeptideTM is clinically proven to
reverse hair damage from bleach + color, chemical services, and heat to renew strength, softness,
smoothness, and bounce.


Our insight

Our insight:


Hair like new in 4 minutes


How to use

How to use:


Traveling deeper into the inner layers of hair than traditional repair products, our revolutionary patented. K18PeptideTM is just the right size and molecular structure to fit in and reconnect broken keratin chains, renewing strength, softness, smoothness, and bounce.

IN the shower
1. Shampoo– a detox shampoo is best to remove any build up if you’re a heavy product user
2. Do NOT Condition (we know a little scary, but trust us you won’t need it) this allows our peptide to penetrate
effectively

OUT of the shower
3. Using a towel, gently dry hair until damp
4. Start with one pump of K18
5. Only add more as needed (this highly concentrated formula means even the most extremely thick, coily hair uses
maximum 3 pumps) Average use is 2 pumps.
6. Work evenly into hair from ends to roots
7. Let sit for 4 minutes to activate. Do NOT rinse out.
8. Style as usual once the 4-minute window is up (this is when you can add a heat protectant or another styler if you
want)


Ingredients

Ingredients:


Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20,sh-Oligopeptide-78 (K18PeptideTM), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol.


Brand info

Brand info:


We’re on a crusade to liberate haircare. Haircare products have fallen into two categories:
conditioning treatments that coat hair, or repair treatments that work to patch damage, offering
temporary results. Instead of building our brand on buzzwords and beliefs of the past, we took
the radical path of biotech to develop K18 Hair.


Beauty Expert Reviews 176

What's a Beauty Expert?
Beauty Experts consist of estheticians, cosmetologists, makeup artists, and beauty professionals who supplied documented proof of their industry experience.

missdeedee


Verified experts are beauty professionals who receive free products for independent reviews without receiving payment.

K18 BIOMIMETIC HAIRSCIENCE
The science behind this product is amazing. I love the information this product line provides to explain the science that goes on inside the hair. The graphic image K18 offers really opened my eyes to understanding how dynamic the hair strand is.
This leave-in molecular repair hair mask hasn't really helped my hair. I used a clarifying shampoo prior to applying K18. My hair is generally unhealthy. It lacks diameter and weight. I was hoping the restructuring qualities in this product would help build a better strand for me. However, the product made the last few inches of... Read more


emilydior


Verified experts are beauty professionals who receive free products for independent reviews without receiving payment.

Full disclaimer, I'm an esthetician and makeup artist, so I don't have pro experience with hair aside from what I've learned from my cosmetologist coworkers. So working in a salon/spa environment gives plenty of opportunities to experiment with each other. As such, I have gone from deep brown (natural) to red, to full blond, to ombre purple, to full lavender. Having stripped my hair so much, my strands have been in desperate need of a product like k18 leave in molecular repair hair mask! So basically I was beyond extremely excited to sample this new and innovative product. It's quite... Read more


christina40


Verified experts are beauty professionals who receive free products for independent reviews without receiving payment.

As a salon owner I have tried many products on my curly hair clients, coarse hair clients, different hair straightening products… but nothing has been close to this K18 Molecular leave in mask Peptide treatment. You shampoo your hair without following through with any conditioner. Towel dry your hair and depending on how much hair you have or the porosity of it add 1 pump! Starting from the bottom of the hair shaft working your way up. you can add in 1/2 extra pump if needed to but no more than that otherwise it will weigh your hair down and... Read more


hailtotheskin


Verified experts are beauty professionals who receive free products for independent reviews without receiving payment.

K18 mask is a leave-in mask to be used after shampooing your hair, foregoing conditioner, and on towel-dried, slightly damp hair. The company is correct in stating hair care products fall into two categories:
conditioning treatments that coat hair, or repair treatments that give  temporary results. This product boasts a newly patented peptide that reconnects broken keratin chains in your hair. Keratin is the protein that makes up skin, hair and nails. K18 supposedly renews hair with strength, softness, smoothness, and bounce. Big promises. I've been using Olaplex, the original bond-building and restoring product, with great results.  The picture on... Read more


beautywithsky


Verified experts are beauty professionals who receive free products for independent reviews without receiving payment.

K18 Leave In Molecular Repair Hair Mask helped strengthen my hair but felt like I used a lot of product in order to evenly disturb my thick long hair. I have done a lot of damage to my hair over the years and been focusing on doing a deeper repair before changing my hairstyle. A leave in conditioner that will help repair my hair was intriguing to see they recommend not using conditioner in the shower and instant results in 4 minutes. As someone with long and thick hair it takes some time to brush my damp hair and spread... Read more


brianahernandez


Verified experts are beauty professionals who receive free products for independent reviews without receiving payment.

After taking a masterclass and learning the technology behind the K18 Leave In Molecular Repair Hair Mask, I couldn’t wait to try it. I have used several other Keratin Bonding systems within my 20 years behind the chair and was beyond excited to compare the results.

I’ll be honest, after my first try I was not a fan! I made the mistake of automatically pumping two pumps because of my long length and thick density. I assumed I would need two although the bottle clearly states starting with one. All day I felt like my hair was weighed down, heavy... Read more


erikaleeartistry


Verified experts are beauty professionals who receive free products for independent reviews without receiving payment.

K18 Leave-in Molecular Repair Hair Mask was a bit of a nerve-racking walkthrough of previous hair trauma after having a hairstylist not give me all of the information I needed when using Olaplex. Olaplex was a tragic loss to my poor hair which I am still recovering from. It was TRAGIC. Straw hair that was dry, broken, and disgusting after the Olaplex debacle. I don't know what it is about Olaplex but OOOOF! I was a bit tentative on this product but after listening to a class and then doing my own due diligence... Read more


reviewsbygaby


Verified experts are beauty professionals who receive free products for independent reviews without receiving payment.

As a Licensed Esthetician, my main focus has always been skincare. Although some can argue that technically the scalp is skincare, my focus was never hair care in general. With that being said, I did work as a Beauty Consultant and with that, came the responsibility of also learning about hair care. This gave me the opportunity to learn about products, hair types and how to care for your hair.

Personally, I was that teen who really enjoyed coloring my hair different colors and using tools to create different styles. But, by the time I reached my early 20s, I... Read more


amelypauline


Verified experts are beauty professionals who receive free products for independent reviews without receiving payment.

As a beauty professional of many years I am constantly trying out the latest and greatest in hair, skin, and all things beauty and self-care, particularly in the category of hair masks and hair treatments. My porous and often parched curly-coily hair often requires extra care and the highest quality ingredients on wash days in order to maintain its health and retain gains in length and thickness and most hair masks, ampoules, and treatments targeted towards repairing the hair's structure typically don't cut it for my strands, leaving them with the desire for better and more. K18 Leave-in Molecular Repair... Read more


erikarosegainey


Verified experts are beauty professionals who receive free products for independent reviews without receiving payment.

As a hairdresser of 10+ years, I’ve seen and used almost every product available. Most products promise, and they do deliver, but don’t fix years and years of damage. As I personally don’t have damaged hair myself, I used this on my sister. She has bleached, and heat damaged hair. Years of color, on top of heat styling will definitely bring on damage. Her hair is fine, a little longer than her shoulders. One pump of this amazing product was more than enough. Her hair has never felt this healthy, even when it was virgin. It’s unlike any product we’ve... Read more


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