full-size leave-in molecular repair hair mask
4-minute leave-in treatment to reverse hair damage
A leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes. The K18PEPTIDE™ is clinically proven to repair damage from bleach + color, chemical services and heat* – with immediate and lasting results to restore strength, softness, smoothness and bounce to hair.
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how does the k18 mask work?
The K18 mask works as a treatment to reverse damage in 4 minutes. It’s powered by our biomimetic K18PEPTIDE™ to seamlessly fit in and reconnect broken polypeptide chains at the molecular level. As a result, disulfide bonds are also reconnected for reinforced strength along the length + width of hair—offering comprehensive, lasting, and progressive repair.
what is the k18peptide™?
K18PEPTIDE™ is a biotech-developed peptide that mimics hair’s structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during damage from bleach + color, chemical services, and heat*
*Disclaimers
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 ingredients 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 cuticle 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 results so it may vary depending on your hair type and level of damage.
Repair damage for hair like new* in 4 minutes.
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 4-6 washes, then as needed.
*k18hair.com/disclaimers
See how K18 unlocks our community's expression
- Hair Repair
- Texture
- Frizz Control
- Shine
- Manageability
- Vinnie T.Verified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50mLI recommend this productAge 65+Hair Concern Frizz, Dryness, Extending time between washesHair Type Medium Density, Curly/Coily, Grey HairMy Results Less Frizz, Bouncy Hair, Visible Difference, Stronger Hair, Cleaner, fresher hairRated 5 out of 5 stars3 hours agoI received my first K18 from my children as a Christmas Gift
I ran out after 7 months of use and was without it for 1 month…my hair totally suffered. I am grateful that I could afford to buy one for myself. My hair perked up immediately after the first use. Love this product. I’m 86 this month. My hair is amazing.
KUK18Hair UK2 hours agoThank you so much for the love! 💙 We're thrilled to hear the Full-Size Leave-In Molecular Repair Hair Mask is making such a difference for your hair. You're amazing! ✨
- Alia A.Verified BuyerReviewingMini Leave-In Molecular Repair Hair Mask 15 mLI recommend this productAge 35 - 44Hair Concern Chemical damage, Heat damage, Color-care, DrynessHair Type Thick/CoarseMy Results Less Frizz, Shinier Hair, Visible DifferenceRated 5 out of 5 starsYesterdayWorks great
I love the product . It makes your hair shiny and looking healthy. It is great
KUK18Hair UKYesterdayThank you so much for the love! 💙 We're thrilled to hear you're loving how the Mini Leave-In Molecular Repair Hair Mask leaves your hair shiny and healthy-looking! ✨
- Negar J.Verified BuyerReviewingJumbo Leave-In Molecular Repair Hair Mask 100mLI recommend this productAge 25 - 34Hair Concern Heat damage, Frizz, DrynessHair Type Fine/ThinMy Results Less Frizz, Visible Difference, Smoother HairRated 5 out of 5 stars2 days agoSofter, Smoother Hair!
I absolutely love the K18 Leave\-In Conditioner\! My hair feels noticeably softer, smoother, and healthier after using it\. It helps reduce frizz and makes my hair look shiny without making it feel heavy or greasy\. I also love that my hair still looks natural and has movement instead of looking overly styled\. Definitely one of my favorite hair products and worth trying if your hair feels dry or damaged\!
KUK18Hair UK2 days agoThank you so much for the love! 💙 We're thrilled to hear you're loving how the Jumbo Leave-In Molecular Repair Hair Mask leaves your hair softer, smoother, and shiny! ✨
- Madeline Z.Verified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50mLI recommend this productAge 25 - 34Hair Concern Split-Ends, Fragile/brittle hair, Chemical damage, Heat damage, Color-careHair Type Medium Density, Grey Hair, Straight/WavyMy Results Bouncy Hair, Visible Difference, Stronger Hair, Less Breakage, Soft Touchable HairRated 5 out of 5 stars2 days agoShe’s small - but mighty!
One of the few repair treatments I can genuinely see and feel a difference with! My hair feels stronger, softer and healthier without feeling heavy or coated. A staple in my routine, especially after color or heat styling.
KUK18Hair UK2 days agoThank you so much for the love! 💙 We're thrilled to hear you're seeing and feeling such amazing results with the Molecular Repair Hair Mask! ✨
- Simone O.Verified BuyerReviewingLeave-In Molecular Repair Hair Mask SampleI recommend this productRated 5 out of 5 stars6 days agoImpressive!
Just what I needed for my hair. I was tired of buying products that was making my hair so heavy. This is just ridiculous good!
KUK18Hair UK6 days agoThank you so much for the love! 💙 We're thrilled to hear the Leave-In Molecular Repair Hair Mask is delivering exactly what you needed without the heaviness. So happy it's working amazingly for you! ✨