Rated 4.7 out of 5 stars
7,952 Reviews
leave-in molecular repair hair mask
4-minute leave-in treatment to reverse hair damage
Description
A leave-in treatment mask for all hair types that clinically reverses damage in 4 minutes. The patented peptide technology works to repair damage from bleach, color, chemical services & heat – restoring strength, softness, smoothness, and bounce to hair.
what you can expect
by damage type
backed by science,
loved by stylists
loved by stylists
Our community of stylists and colorists believe K18 is liberating hair—no matter the hair type or generation.
– Christine Thompson, Director of Color at Spoke & Weal
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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.
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.
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.
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.
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.
You will start to see stronger, softer, healthier hair after just one use.
Renews strength, softness, smoothness, and bounce
7,952 reviews
- Nycki B.Verified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50mLI recommend this productAge 25 - 34Hair Concern Heat damage, Fragile/brittle hair, Split-Ends, Frizz, DrynessHair Type Straight/WavyMy Results Less Frizz, Stronger Hair, Less BreakageRated 5 out of 5 stars3 days agoHydration
Hair is definitely more hydrated
KK18Hair2 days agoThank you for your review!
- Lee G.Verified BuyerReviewingMini Leave-In Molecular Repair Hair Mask 15 mLI recommend this productAge 25 - 34Hair Concern Chemical damage, Frizz, Fragile/brittle hair, Dryness, Split-EndsHair Type Medium Density, Straight/WavyMy Results Visible Difference, Smoother Hair, Stronger Hair, Less Breakage, Soft Touchable HairRated 5 out of 5 stars5 days agoDivine results
I have only used this four times so far but every time I use it, I can see improvement in my hair. My hair has never been so silky, shiny and untangled.
KK18Hair2 days agoAmazing, right? Thank you for your review!
- MarinaVerified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50mLI recommend this productAge 25 - 34Hair Concern Heat damage, Chemical damage, Fragile/brittle hair, Frizz, Split-EndsHair Type Curly/CoilyMy Results Less Frizz, Less Breakage, Shinier Hair, Stronger Hair, Visible DifferenceRated 5 out of 5 stars2 weeks agoLove this stuff
My hair has grown so much since using this. I bleach my hair and this really keeps my hair healthy.
KK18Hair2 weeks agoLength and healthy! Thank you Marina!
- Briana H.Verified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50mLI recommend this productAge 35 - 44Hair Concern Color-care, Heat damage, Split-EndsHair Type Thick/Coarse, Curly/CoilyMy Results Less Frizz, Smoother Hair, Defined Curl/Wave PatternRated 5 out of 5 stars1 month agoAmazing
I couldn’t believe how well
This worked on my 4B super coily dense hair. Trust the instructions you really only need 2-3 pumps no extra conditioner.
KK18Hair4 weeks agoThank you Briana! Less is more is our motto!
- Megan J.Verified BuyerReviewingMini Leave-In Molecular Repair Hair Mask 15 mLI recommend this productAge 35 - 44Hair Concern Heat damage, Fragile/brittle hair, Dryness, Oily hair/scalpHair Type Fine/ThinMy Results Visible Difference, Stronger Hair, Less Breakage, Soft Touchable Hair, Smoother HairRated 5 out of 5 stars1 month agoFor bleached hair
I absolutely love this product. I use it a couple times a month. I have been bleaching my hair for 30 years and my hair looks so healthy! It only are their products amazing, but they are a great company that cares about humans and mental health. I will always give k18 my business.
KK18Hair4 weeks agoIts not just hair for us! Thank you Megan! We appreciate your review! BTW your hair looks AMAZING!
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