All orders will ship within 2-3 business days from purchase. You will receive an order confirmation email. Once your order ships, you will receive an alert via email with the tracking information.

Please NOTE: Due to the current pandemic, USPS has been severely impacted. There are instances where packages are being marked delivered when they haven’t. If this happens to you, please allow 7-10 days for USPS to attempt delivery and if you still don’t receive your order, please reach out to hello@k18hair.com for assistance. We appreciate your patience through these trying times and your continued support. 

Once your order is shipped, you will receive an alert via email with your tracking information. Please contact our customer service department at (415) 495-7210 X 101 or via email at hello@k18hair.com. Our business hours are Monday-Friday from 9-5pm PST. 

If you would like to cancel your order, please call us immediately at (415) 495-7210 X 101 or contact us at hello@k18hair.com. Please keep in mind our system is designed to fulfill orders as quickly as possible. We will make every effort to accommodate your request. Once your order enters the shipping process, we cannot cancel or make any changes to your order.

Your credit card will be charged at checkout. When your order is placed an email confirmation will be sent.

We accept Visa, Mastercard, American Express, Google Pay, Apple Pay and PayPal.

We currently collect tax from: Arizona, California, Colorado, Connecticut, Florida, Georgia, Illinois, Indiana, Kansas, Kentucky, Maryland, Massachusetts, Michigan, Minnesota, Nevada, New Jersey, New York, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, Washington, and Wisconsin

If an item changes price within 7 days of purchase, we will gladly price match it for you. 

Please Note: All K18 products must be purchased directly from our website. This policy does not extend to our salon partner promotions.

Unfortunately, we cannot accept CODs, cash, checks, or collect calls.

We’ve taken steps to ensure all information received from our online visitors is secure from unauthorized access and use. All transactions are completed on a secure server. In secure mode, your computer and our server send data back and forth in an encrypted format.

We happily offer free shipping within the continental United States. Your order will ship via UPS Ground or USPS, whichever method is appropriate based on the weight of the order. 

Orders to Alaska and Hawaii will ship Priority Mail via USPS only. All orders are shipped out of our warehouse in Northern California.

All orders will be processed and shipped within 2-3 business days after your order is placed. Our business hours are Monday through Friday from 9am-5pm PST. If you place an order on a Friday, your order will ship by Tuesday the following week, given Monday is not a holiday.

We ship all K18 products via UPS. We also offer expedited shipping at an additional cost. Please NOTE: Allow 2-3 business days for processing before your package is shipped per the expedited shipping selected. 

If for any reason you are unsatisfied with K18, we happily offer a refund within 90 days of your receipt date for U.S. domestic orders placed directly through our website. 

Please NOTE: We only process returns for products purchased directly through our website. Any K18 products purchased at our partnering salons must be returned to the store it was originally purchased from. Due to security constraints, we cannot reimburse you for an amount greater than your purchase amount. 

To return your item, please contact a customer service representative at (415) 495-7210 x 101 or via email at hello@k18hair.com. Our business hours are Monday- Friday from 9am-5pm PST.

Please allow up to two weeks for your refund to appear on your credit card statement, each financial institution varies.

If your order from K18 arrives damaged and/or unusable, please contact a customer service representative at (415) 495-7210 X 101 or at hello@k18hair.com. Our business hours are Monday-Friday from 9am-5pm.

Parabens, Sulfates, Silicones, Phthalates, Sodium Chloride, Artificial Colors, Formaldehyde and Formaldehyde Donors.

Vegan, Cruelty-Free, Color-Safe, and Dermatologically Tested.

K18 Mask:

Water (Aqua) (Eau), Alcohol Denat., PropyleneGlycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, BehentrimoniumChloride, Polysorbate 20, sh-Oligopeptide-78, Hydrolyzed Wheat Protein,Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol,Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, HexylCinnamal, Benzyl Alcohol.

K18 Mist:

Water (Aqua) (Eau), Alcohol Denat., PropyleneGlycol, Polysorbate 20, sh-Oligopeptide-78, Hydrolyzed Wheat Protein,Hydrolyzed Wheat Starch, Acrylates/C10-30 Alkyl Acrylate Crosspolymer,Phenoxyethanol, Potassium Sorbate, Potassium Hydroxide, Fragrance (Parfum),Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol.

a. The K18Peptide ™ molecular repair service is a bioactive 2-step in-salon treatment infused with our patented K18Peptide ™.

i. K18 Mist - K18 Professional Mist is a pre-service treatment that strengthens hair before a chemical service. The pH level of 7.5-8.0 shifts the cuticle layer to penetrate into hair’s cortex and hone in on damage sites.

ii. K18 Professional Mask is a post-service treatment that repairs damage caused during any salon service. With a pH level of 5.0-6.0, the mask helps to close the cuticle and seal in the peptide, with added lightweight conditioning benefits to keep hair smooth and soft.

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

- Bleach + Color

- Chemical Services

- Heat

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 deeper into the inner layers of hair than traditional repair products, our revolutionary peptide is just the right size and makeup to fit in and reconnect those broken polypeptide chains (keratin chains). And because our peptide is a bit of an overachiever, as a result of this reconnection, any disturbed disulfide bonds are also re-conformed.

Our peptideemploys 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.

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.

EP3058936A2

Yes. All formulas are optimized to be the best delivery system to get the peptide where it needs to go.

K18 is safe to use on all hair types and textures, all generations and was made to be used on all types of damage.

K18 Mist is a lightweight mist that strengthens hair and repairs existing damage before a chemical service. It’s clinically proven to repair damaged hair after just one 4-minute in-salon treatment. The slightly alkaline pH of 7.5-8.0 is designed to shift the cuticle layer, quickly penetrate the hair’s cortex, and hone in on damaged sites. From there, K18Peptide™regenerates and restores hair’s strength and elasticity. This allows hair to withstand damage occurring during the chemical service.

K18 Professional Mask is a post-service treatment that repairs damage caused during any salon service and can be used as an at-home treatment for clients to control ongoing damage. With a pH level of 5.0-6.0, the mask helps to close the cuticle and seal in the peptide, with added lightweight conditioning benefits to keep hair smooth and soft. The mask is clinically proven to renew damaged hair after just one 4-minute treatment.

K18 is safe to use on all hair types and textures, all generations, and was made to be used on all types of damage.

We like to keep our formulas minimal, only using the exact amount of ingredients needed to get the peptide where it needs to go. Our unique blend of 3 alcohols function to open up the hair cuticle so the K18Peptide ™ can penetrate the inner most layer of hair, reaching the broken polypeptide chains (keratinchains). Here the alcohol serves as an agent to optimize the hair environment for K18 to work on a deeper level.

Follow these steps to get the most out of K18.

IN the shower:

-       Shampoo, rinse.Skip the conditioner

OUT of the shower

-       Towel dry hair thoroughly.

-       Apply Mask. Wait 4 minutes. Do NOT rinse out.

-       After 4 minutes, apply styling products if desired and dry/style as usual.

This is a progressive treatment designed to be used for 6 consecutive washes. After that, use every 3-4 washes to maintain healthy hair.

The K18 Mist was made to be used in the salon before chemical services. Ask your salon professional about using before your next in-salon service.

No.

K18 does not protect from heat, but it is clinically proven to repair damage from heat styling.

K18 is not organic as we employ both natural and synthetic ingredients to get our peptide where it needs to go. This intentional blend of less than 15 ingredients prioritizes cleanliness, safety, and peptide optimization.

You will start to see stronger, softer, healthier hair after just one use.

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.

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.

K18 Mask is meant to be used without conditioner. Conditioner can coat hair, making it hard for our peptide to penetrate fully. Most find they don’t need an additional conditioner after using K18.  

If you need more hydration, you can apply conditioner or a leave-in after the initial 4-minute waiting period is over. If you do not, do NOT rinse K18 mask out prior to application.

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.

K18 is a highly concentrated formula, so a little goes a long way. We recommend following our dosage chart to find the optimal amount for your hair type. K18 should be used consecutively for 6 washes. After that, use every 3-4 washes to maintain the integrity of hair’s health.

K18 Mask is a progressive treatment designed to be used consecutively for 6 washes. After that, use every 3-4 washes to maintain the integrity of hair’s health.

No, K18 mask is meant to be applied to towel-dried, damp hair post-shower.

Always apply K18 to towel-dried, damp hair.

We do not recommend mixing K18 directly with other products, but you can use additional styling products on top of K18 after the initial 4-minute processing time is over.

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.

No, K18’s strengthening and smoothing results are clinically proven to remain in hair, even after repeated shampoos. 

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.

An extreme amount of protein is only possible when proteins are synthetic. They can be over used and create build up in the hair resulting in brittle, weak hair. K18 is not a protein treatment. K18 is made up of 13 amino acids which form into a peptide chain nature intended. This technology regenerates the disulfide bond in the hair. 

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

o  Bleach + Color

o  Chemical Services

o  Heat

Clients should check with their doctor before using K18 if they have a wheat allergy. If their doctor allows, they should test the product on a small patch of skin to make sure there is no reaction before applying.

Although K18 is free of sulfates, parabens, phthalates, silicones, artificial colors, sodium chloride, and is vegan and cruelty-free, we recommend clients consult their doctors before using K18 during pregnancy or if they are concerned about specific allergies.

We are happy to provide a MSDS sheet.