Skip to product information

K18 Hair

K18 Hair

 (26,825 Reviews)
Regular price $69.90
Regular price $69.90 Sale price $75.00
SAVE 6% Sold out

full-size leave-in molecular repair hair mask

BUNDLE & SAVE

  • local_shipping Free delivery for two piece or more
View full details

got questions?

how does the k18 mask work?

The K18 mask works as a treatment to reverse damage in 4 minutess,It's powered by our biomimetic K18PEPTIDE to seamlessly fit in and reconnect broken polypoptide chains at the molecoular level, As a rosult,disulfide bonds are also roconnected for roinforced strongth along the length t width of hair-offering comprehensive, lasting, and progressive repair.

what is the k18peptide?

K18PEPTIDE is a biotech-develpped peptide that mimics hair's structure to reverse damage by reconnecting polypeptide chains and disurfide bonds broken during damage from bleach + color, chemical services, and heat*

why skip conditioner?

Conditioner leaves a film 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 product.

i noticed there's alcohol in the formula, isn't that bad for you?

We like to keep our formulas minimal,only using the exact amount of ingrecients needed to get the peptide where it needs to go. Here the alcohol serves as an agent to optimize the hair environment for the K18 mask to work on a deeper level. Our unique blend of 3 alcohols functions to open the hair cuticdle so the K18PEPTIDE can penetrate the innermost layer of hair, reaching the broken polypeptide chains (keratin chains).

when should i expect to see results?

Most see results after 2-3 uses. The more damaged the hair,the more dramatic the resuts so it may vary depencing on your hair type and level of damage.

soft, strong, bouncy hair for everyone

"It makes my hair so soft and weightless, I absolutely love it...Makes my hair feel so luxurious, it's like I just left the salon. Can't recommend this product more!"

- Anastasiia T.

Before

After

 
 

soft, strong, bouncy hair for everyone

"My hair has been a mess for years...My new hair stylist recommended K18!... My hair looks and feels amazing with lasting results!!"

- Arnell M

Before

After

 
 

soft, strong, bouncy hair for everyone

"I normally don't use hair oils as my hair gets naturally oily....I loved the end result! I will officially be adding this hairoil to my routine"

- Fabiola N.

Before

After

 
 
  •  

    powered by K18PEPTIDE

    Biomimetic peptide clicks into hair's keratin structure-the source of core strength-for soft, shiny, bouncy results that won't wash away.

how to use molecular repair mask

1. Shampoo, do not condition. Towel-dry thoroughly.
2. Apply 1-3 pumps 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 styling product + style as usual. Use for 4-6washes, then as needed.

our story

Our story began with a decade of complex research into the bioscience of hair, resulting in our patented molecular repair peptide. Through this research and the application of Synthetic biology, we are able to do more with less,simplifying formulations and routines to support hair health and expression at home and in the salon.

meet our proprietary biote chnology:

K18PEPTIDE

K18PEPTIDE repairs hair at a molecular level across
multiple types of bonds including polypeptide chains and disulfide bonds to reverse damage from bleach, color,chemical services, and heat*. Developed through biotechnology, the K18PEPTIDE is optimized for human biology and uniquely matches and clicks into hair's keratin structure, reconnecting damage sites at the molecular level, K18PEPTIDE delivers durable repair for all hair types, restoring strength and elasticity.

odorBIND

odorBIND revolutionizes what's possible when targeting and eliminating odors. Using biotechnology and synthetic biology, K18 bioscientists utilized DNA databases to find and mimic the strongest olfactory systems (our sense ofsmell) found in nature. odorBIND harnesses that understanding of nature and biology to uniquely recognize,trap, and eliminate malodors, rendering them undetectable and releasing a subtle fragrance in their place. This smart-release molecule is vegan, cruelty-free, and cortified Kosher and Halal. Find it in AirWash, the reinvention ofdry shampoo.

resilicore

Patented resilicore heat-shielding technology protects from heat deeper than ever before*. Unlike traditional heat protectants that only coat hair's cuticle, the size +molecular makeup of resilicore allows it to penetrate into hair's core to defend against heat from the cuticle to the cortex*-as deep as heat damage goes. Inspired by proteins in nature that can withstand extreme tomperatures, this protective shield fortifies hair from within for maximum protection against color fade, dry feeling,dullness, and breakage. This heat-shielding tech is inspired by nature, and recreated in the lab to be vegan, sustainable+ and cruelty-free. Find it in HeatBounce, the future of heat protection.

  • effective

    nature-inspired,biotech-powered innovations solve your hair concerns inside + out

  • simple

    less-is-more formulas work for every hair type, texture + color

  • fast + long-lasting

    quick-working solutions give you rapid results that last

    How much leave-in mask do you*really* need?

    In most cases, the more hair you have, the more pumps of the mask you'll need to use. But it's not always that cut-and-dry. For instance, you may have fine hair but a lot of it. Or perhaps you have curly hair but it's on the thinner side.Similarly, maybe your stands are short but you bleach them super often. All of these discrepancies will inffuence how much of the mask your hair actually needs.

    SHOP NOW
    • ABSOLUTELY OBSESSED

      After the worst year possible for my hair, I was begging for something new that would work. I started seeing a new hair dresser who recommended the K18 leave in product. I just came up on 1 year of using it and my transformation is absolutely insane to me. I thought I would never get my hair back buthappy to say I love it and feel so confident in it now.

      Sabrina L. Verified Buyer

    • Hair Makeover

      I don't know what I'd do without this product. It has changed my hair from thin and dry to moist and healthy! I notice when I don't use it my hair begins tofall out, the only downside is the product doesn't meet clean ingredient requirements, I usually only buy items that do, but I make the sacrifice because my hair is dead without it.

      Jamie C. Verifed Buyer

    • Motorcycle Riding

      Chirstmas day I went for a short motorcycle ride.Forgot to put my hair up. When I got pack home Iwas able to run my fingers through my hair. I've done this once before and ended up with a big not in my hair. It was very hard to get it out. Tore out some ofmy hair. It didn't happen this time. Yeah love ve this product

      Anita T. Verified Buyer

    • Softness And Shine

      Finally found a product to bring softness and shine to my dull well water hair

      Jodi J. Verified Buyer

      The Top K18 Mask FAQs

      How often should I use it?

      Our mask is designed to be a powerful treatment that repairs damaged hair. But the key to using it effectively is understanding how often to apply it and how much to use.
      Generally, you can use it once or twice a week, depending on how much repair your hair needs. If your hair is very damaged or over-processed, you might want to start using it more frequently, but if you're maintaining healthy hair,once a week should be plenty.

      How much should I use?

      For most people, a little bit will go a long way, and using too much can actually weigh hair down or leave it feeling greasy. So, it's important to use just the right amount. Use our calculator to find your ideal dosage.

      Does it work for all hair types?

      Yes. Whether you have straight, wavy,curly,coily, fine,thick, or aging hair, the mask has the ability to help repair and strengthen your strands.

      I have curly and coily hair. Should I use it?

      Yes! The mask works beautifully for this hair type because it helps to detangle and define cur's while also providing essential repair. After applying the mask, detangle with a wide-tooth comb or your fingers to help enhance the shape and definition of your cur's as you let them air dry or diffuse them (the mask's treatment properties will also protect
      curls from heat damage during the styling process).

      I have aging hair. Is this product for me?

      Yes! Aging hair is often more fragile and prone to breakage, and the mask can make a significant difference in preserving your hair's natural integrity. One key tip: when applying the mask,focus on the areas that need the most care first. With aging hair,this is usually around the temples, crown, or nape of the neck. This can help you achieve aneven, nourished result without overloading your hair with product.

      My hair is really damaged. How should I mask?

      The mask is especially effective on damaged hair, whether caused by heat styling, chemical treatments, or environmental factors. To apply: Focus on the most compromised sections first-such as the mid-Iengths and ends before working the product toward healthier areas, using a gentle touch. This will ensure that your hair gets the concentrated treatment it needs without over-saturating healthier sections.

      Should I skip conditioner after?

      This is our most-asked question of all time, and the short answer is: yes, you can skip conditioner after! The mask itself is highly conditioning and also works as a light detangler, so simply apply and let it work its magic. If you have particularly dry hair, though, you might choose to follow the mask with a light leave-in conditioner or styling product,but it's generally not necessary.