full-size leave-in molecular repair hair mask
Retail size of our 4-minute leave-in treatment to reverse hair damage
A retail-sized version of the K18 mask helps to maintain your client's hair strength and elasticity in-between salon appointments. This leave-in treatment mask for all hair types that reverses damage in 4 minutes. Patented peptide technology works to repair damage from bleach + color, chemical services, and heat* — restoring 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.
*k18hairpro.com/disclaimers
See how K18 unlocks our community's expression
- Hair Texture
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- Shine
- Michael S.Verified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)I recommend this productAge 25 - 34Hair Concern Chemical damage, Heat damage, Fragile/brittle hair, Split-EndsHair Type Medium DensityMy Results Less Frizz, Visible Difference, Stronger Hair, Less Breakage, Smoother HairRated 5 out of 5 stars8 hours agoMAGIC RESTORATION! ✨
I recently had my hair bleached, and my ends and lighter blonde sections were left terribly damaged. This product restored my damaged hair in just ONE DAY!
I’m honestly so amazed. It feels like magic!!!
My hair was stretchy like chewing gum, tangled, and had broken ends.
And after just ONE use… WOW! Everything improved so much!
Honestly, this product is THE BEST! 🤍
K18Hair PRO7 hours agoThank you so much for your amazing review, Michael! We're thrilled the Molecular Repair Hair Mask delivered such incredible results for your bleached hair. Your support means everything to us! 💖✨
- Diana G.Verified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)I recommend this productAge 65+Hair Concern Color-care, Heat damageHair Type Fine/ThinMy Results Visible Difference, Shinier HairRated 5 out of 5 stars3 days agoLeave in Molecular
My hair dresser uses this product and I started using it in between my visits to her. I love the way it makes my hair feel. Very soft and shiny.
K18Hair PRO3 days agoThank you so much for your wonderful review, Diana! 💕 We're thrilled to hear that our Molecular Repair Hair Mask leaves your hair feeling so soft and shiny. We love that it's become part of your hair care routine!
- Marta A. R.Verified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)Age 55 - 64Hair Concern DrynessHair Type Thick/CoarseMy Results Visible Difference, Smoother Hair, Cleaner, fresher hairRated 3 out of 5 stars4 days agoSeems to work but weird smell
I have relatively long hair so I had to use three pumps and I followed the directions verbatim. I could immediately tell that my hair was reacting to this product. It appeared to smooth it out and almost straighten some of my waves. I liked the outcome. As minutes passed, I realized that my hair was looking a bit frizzy so I added some of my old product to it and it seemed to do the trick. I don’t like the odor of the product but will continue to use it more as recommended and see how it goes.
K18Hair PRO2 days agoThank you for giving our products a try! We’d love to help you get the best results possible. Please reach out to our Customer Care team at hello@k18hair.com so we can walk you through some troubleshooting tips.
- Kristi B.Verified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)I recommend this productAge 45 - 54Hair Concern Split-EndsHair Type Fine/ThinMy Results Shinier Hair, Visible DifferenceRated 5 out of 5 stars4 days agoLove this item
My hair feels fuller and healthier after using this.
K18Hair PRO4 days agoThank you so much for your wonderful 5-star review, Kristi! 💕 We're thrilled to hear that our Molecular Repair Hair Mask is leaving your hair feeling fuller and healthier. Thank you for your support!
- Nancy H.Verified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)Age 55 - 64Hair Concern Frizz, DrynessHair Type Medium Density, Grey HairMy Results Less FrizzRated 3 out of 5 stars5 days agoStill hopeful
I have color treated my hair for many years, and it is dry and frizzy. I have tried many expensive products to reduce dryness and frizz, but nothing worked. My salon suggested I try K18 leave in mask. I've done 4 treatments with it, and my hair is slowly returning to a more healthier look and feel. I hope it continues to improve over the next several weeks.
K18Hair PRO5 days agoThank you so much for sharing your journey with us, Nancy! We're so glad you're already noticing improvements in your hair's health and feel. We're rooting for you! 💙