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
- Hair Damage
- Effectiveness
- Hair Repair
- Shine
- Behnaz S.Verified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)I recommend this productAge 45 - 54Hair Concern Chemical damage, Heat damage, Color-care, FrizzHair Type Medium DensityMy Results Less Breakage, Stronger Hair, Visible Difference, Less FrizzRated 5 out of 5 stars1 hour agoAmazing product
I have been using K18 for 3 years. It is THE product that has prevented my hair from looking completely fried, considering that I get highlights every 3 months. It’s a costly product, but so worth it!
No more split ends, which I used to get before I discovered K18.
It is important to take time to follow instructions. Not conditioner before. Rub between your palms till it looks like white paint, before applying to hair. Let is sit for 3-4 minutes, before you touch your hair.
If I have time, I do a mask or conditioner, then rinse out and style. If not, then I put in some leave in styling product, and comb through and put my hair in a bun.
K18Hair PRO4 minutes agoThank you so much for your amazing review and for being a loyal K18 customer for 3 years! We're thrilled the Molecular Repair Mask has been such a game-changer for your hair. 💗✨
- Suzanne B.Verified ReviewerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)I recommend this productAge 55 - 64Hair Concern FrizzHair Type Medium DensityMy Results Less Breakage, Smoother Hair, Visible DifferenceRated 5 out of 5 starsYesterdayMiracle product
I received the leave in mask and leave in conditioner as my free birthday gift from Ulta after just one use it transformed my hair truly repaired the breakage I had and left it smooth and silky looking like a salon blowout. I will definitely be using this product and buying it.
K18Hair PROYesterdayThank you so much for your kind words, Suzanne! We're thrilled the Molecular Repair Mask transformed your hair and that you're loving the results! 💗 We appreciate your support!
- Constance C.Verified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)I recommend this productAge 45 - 54Hair Concern DrynessHair Type Grey HairMy Results Visible DifferenceRated 5 out of 5 stars2 days agoPerfect
Such an amazing product!
K18Hair PRO2 days agoThank you so much for your kind words, Constance! We're thrilled you're loving the Full-Size Leave-In Molecular Repair Hair Mask! 💗
- rebeccaVerified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)I recommend this productRated 5 out of 5 stars4 days agoI love this stuff
I've been using this for almost a year and my hair is so much stronger than it once was. I recommend it to anyone who wants healthy hair.
K18Hair PRO4 days agoThank you so much for your amazing review, Rebecca! We're thrilled the Molecular Repair Mask has made such a difference in your hair's strength. We love your support! 💚
- Caroline K.Verified BuyerReviewingFull-Size Leave-In Molecular Repair Hair Mask 50 mL (WHOLESALE)I recommend this productAge 35 - 44Hair Concern Chemical damage, Frizz, Heat damage, Fragile/brittle hair, DrynessHair Type Curly/CoilyMy Results Less Frizz, Visible Difference, Less Breakage, Smoother Hair, Shinier HairRated 5 out of 5 stars6 days agoIt works
I do a clarifying shampoo or the peptide prep prior to puting n the mask. Over the last 6 months my hair has transformed to healthier and longer.
K18Hair PRO5 days agoWe're so thrilled to hear about your hair transformation over these past 6 months, Caroline! 💚 Thank you for being part of the K18 community!