








Product description


The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. K18 Molecular Repair Hair Mask Merchant Video

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.
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.
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.
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.
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Customer Reviews
4.3 out of 5 stars 29,261
4.3 out of 5 stars 2,740
4.5 out of 5 stars 1,446
4.6 out of 5 stars 2,316
4.5 out of 5 stars 1,495
4.4 out of 5 stars 1,446
4.4 out of 5 stars 593
Price
$75.00$75.00
$65.00$65.00
$39.00$39.00
$39.00$39.00
$39.00$39.00
$48.00$48.00
$46.00$46.00
Molecular Repair
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Maintenance Routine
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Treatment Routine
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Used By Professionals
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At Home Use
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Product Dimensions : 1.87 x 1.87 x 4 inches; 3.2 ounces
Item model number : K18-31005
UPC : 858511001029 858511001128 729162271362 729162270877 755801147958 726929222179 729162271317 729162271249 729162271096
Manufacturer : K18
ASIN : B0961ZS96M
Best Sellers Rank: #118 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #1 in Hair Treatment Masks
Customer Reviews: 4.3 4.3 out of 5 stars (29,261) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
An At-home Leave-In Treatment infused with the patented K18Peptide that renews hair to its most youthful, healthy state. Benefits: Works to repair even the most extreme damage caused by bleach and color, chemical services, and heat.
Creates Like Hair Like New: Traveling into the inner-most layers of hair to reach the core polypeptide chains our revolutionary K18Peptide is just the right size and makeup to reconnect broken chains responsible for hair strength and elasticity.
Renews All Hair Types: K18 doesn’t just hide damage or patch it up leaving hair brittle, it transforms even the most extreme damage into hair that looks and feels like new. K18 works on all hair types, all generations, all types of expression.
Lasting Results That Won’t Wash Away: The K18Peptide mimics the natural building blocks of hair and therefore is recognized as natural—so it’s able to integrate itself with the keratin chains to rebuild and restore hair immediately and over time.
Back By Biotech: K18 is the world’s first patented biotech treatment that renews chemically damaged hair from the inside out in just 4 minutes, strength, softness, smoothness, and bounce are restored for hair that looks and feels like new.
11 reviews for K18 Leave-In Molecular Repair Hair Mask, Patented, Lasting Repair For Dry, Frizzy, Damaged Hair, Reverse Damage In 4 Minutes From Bleach, Color, Chemical Services + Heat
Add a review
$75.00
A lady who loves Amazon –
Amazing
I’ve tried a lot of leave-in hair products over the years, and this one honestly surprised me. I started noticing a real difference the second time I used it. My hair felt noticeably softer, smoother, and much easier to manage. It also helped reduce frizz and made my hair look healthier and more hydrated.I’ll admit I was hesitant to buy it at first because it’s a little pricey. I’ve purchased many products with amazing reviews before and ended up being disappointed when they didn’t work for my hair. But this product actually lives up to the hype.Another thing I like is that you don’t need to use a lot. A small amount goes a long way, so the bottle lasts longer than you might think. Because of that, I would recommend buying the 50 ml size since it’s usually a better value and can save you money in the long run.Overall, I’m really happy with this purchase. After using it several times, I can confidently say it deserves the positive reviews it gets. If you’re looking for a leave-in product that helps with softness, manageability, and frizz, this one is definitely worth trying.
GG –
OMG! OMG ! OMG! K-18 FULFILLS ITS CLAIMS Read on!
I’m over 55 and have spent decades trying everything — from $9 to $144 per product — hoping for softer, healthier hair. I have 3a curls hidden under years of color, heat damage, and dryness. My hair would break and frizz so badly it looked like I had layers (I don’t). K18 is the first and only product that actually delivered on its promise to repair — not just coat — my hair. I was fully prepared to return this if it did not make a difference. It did.This isn’t a conditioner or mask. K18 uses a patented technology that works from the inside out. I used a clarifying shampoo, applied 6 pumps (very small pumps from the “try it” bottle!), finger-raked it through damp hair, waited 4 minutes, and then combed through. No rinsing, no other products. I let my hair air-dry, and it already felt softer and smoother with significantly less frizz. No fragrance -makes me happy.Important note: You do not need to rub this aggressively between your palms to “activate” it — that’s a common myth. Just rub your palms lightly so you can apply it evenly and let the science do the work. It works on the keratin molecules to repair your hair from the inside out. Friction is not going to make the molecules smaller. Don’t know why people start these rumors.The next morning, I used my straightener on medium heat and was stunned. Instead of the usual dry straw, my hair was sleek, shiny, and bouncy. Even the ends curled beautifully — something I’ve never seen on my hair before.After four treatments, my hair now feels different, although the greatest results came after the very first use. My hair is softer, smoother, more manageable, with less frizz and more shine. Even in Florida’s 90°+ heat and humidity, it holds up — and I’m not using anything else but K18. A friend even asked to try it after seeing my results.It’s expensive, but absolutely worth it. I’ve already bought the larger bottle. I’m sticking with K18 — this changed everything for me. And to address the expense, the 50mL pump provides 50 pumps. That’s 25 applications for me. My average thickness, long hair uses 2 full regular pumps. After the first 4 applications, you move to every 4 washes. That means after the first four treatments, I have 21 treatments more still in the pump bottle. For me, with super dry hair, that means it will last another 18-21 weeks since I only wash once a week, and an occasional “extra”. I am going to guess I have taken at least $100 of products that did not work for me to the women’s shelter over that time, meaning the waste was as much as this effective product that takes no time to use, packs easily in a suitcase, doesn’t stink and IT WORKS!If you have super straight, silky hair, like Asian hair, or other non-porous hair, I do not think you are going to get the same results. You probably already have the kind of hair those of us with porous, damaged hair are looking for.Ask ChatGPT
Rachel McNamara –
Pricey, but it’s a miracle worker!
Ok I was a bit disappointed in the size when I saw it, especially for how much I paid. But wow, it works. I wish I took a before pic, but seriously every other strand was breaking and split. It looked fried. I was scared to even touch my hair. After one use I could feel and see a difference. I’ve used it twice now, and my hair feels actually healthy. It’s so soft. I have to actively search to try and find a split end. I couldn’t believe it. Before I had trouble finding a strand that wasn’t damaged or split. Now I used 3 pumps at first cuz I thought since I have a lot of hair and it was really damaged in the front, but that made it kind of stiff at first. So don’t use too much or spread it around as much as you can. A little goes a long way. So, now after I’ve seen the results- yeah I can see why this is so expensive.
Cindy Chavez –
Wonderful product!!
I love this product!I’m on the gray blending journey and I’m going from the wine red hair I’ve had for 20 years, to now embarking on a gray adventure.My hair is more dry as the red color is removed, even though my stylist is doing it in phases so to avoid any damage. The red is not going quietly!She recommended the k18 leave in mask to help moisturize and condition my hair, and I love it! My hair feels so soft.I try not to wash my hair any more than necessary right now as I’m transitioning to gray, but I am using it after every wash.I will continue to use it after I get to the gray I want and my existing gray blend with it.It’s a great product! I bought the small size to try it out but then got the larger size later from my stylist. The small size really lasts a long time! I’m still using it and haven’t opened the large bottle yet. I have short hair and use 2-3 pumps each time.I know it’s a little $$ but it’s really a great product!!
Nikki –
Very expensive, but does seem to work well on my hair.
I received this product and was very surprised by how small it is for the price I paid. I have only used it 2 times at this point, but it definitely feels like it is helping my hair. I put this leave-in conditioner on the ends of my hair, and you should wait a few minutes before putting any other products on. I feel like my hair has more bounce and does not look limp and flat anymore. I am excited to see how it works after using it a few more times. It is not greasy, and I didn’t notice any significant smell.
Sherry Donnino –
The Best
This is by far the best total conditioner I have ever tried. It leaves my hair feeling moisturized, smooth, and easy to style. It helps repair split ends and hair that has been color treated for years. It very pricey, but worth it.
Cliente Amazon –
Tenía dudas por algunos comentarios que había leído sobre que no era para tanto, pero realmente puedo decir que funciona desde el primer uso. Mi pelo está decolorado, además llevo peinado bob, por lo que suelo peinar con calor y está rompiéndose. Aposté por este producto por su fama y puedo decir que desde el primer lavado se siente el pelo con más peso y menos fragilidad. Evidentemente si buscáis que solucione la rotura, seamos realistas, ningún producto lo hará. Si quieres mejorar la calidad de tu pelo y recuperar parte del daño, pruébalo. Es caro sí, pero los buenos productos lo son. No se necesita aplicar demasiado producto como cualquier producto de calidad.
Elin –
Leverans som utlovat. Produkten gör mitt silkesmjukt, mycket nöjd än så länge!
Jennifer toupillier –
Très efficace
Illa karla Ramos Araújo –
fortalece bastante. com certeza vou comprar de novo.
Nazlee Mustapha –
very good product