







From the brand



Shop damage repair mask
Shop weightless dry shampoo
Shop shampoo + conditioner
Shop frizz-fighting hair oil


Product Dimensions : 1.37 x 1.37 x 3.18 inches; 1 ounces
Item model number : K18-31007
UPC : 858511001289 746559900490 858511001371
Manufacturer : K18
ASIN : B09HR5KSR8
Best Sellers Rank: #219 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 (26,434) 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); } }); });

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
Dawn Royal –
My favorite hair mask
The reason I bought this product. My hair designer suggested this to help with senior dry hair.1. Easy to read instructions for applying.2. Make hair soft and smooth.3. One pump for thin/fine hair. 2 pumps for thick hair.4. Scent is nice.5. It’s on the expensive side but it’s worth the price for healthier hair in the long run.
Kristen K. –
Love it.
Very different from other hair masks.. I have a Bob cut which I’m trying to grow out. I followed directions and waited four minutes, combed it and left it alone. I always air dry my hair. After it was on, I felt my damp hair and it seemed like there was too much stuff on, like a thick texture. But when it was dry it felt soft, most definitely tamed frizz and encouraged my waves and some curls. It’s expensive, but I will probably use once a week. Try it if your hair needs help.
Yuleidi Paneque Escalet –
K18 excellent product
I am truly impressed with the K18 Leave-In Molecular Repair Hair Mask. After just a few uses, I noticed a dramatic difference in the strength and smoothness of my hair. It brought life back to my ends, reduced frizz, and made my hair feel softer than it has in years. I love that it works quickly and doesn’t require rinsing — just apply and let it do its magic. If your hair is damaged, dry, or over-processed, this product is absolutely worth it. Highly recommended!
Wifey and Mom of 4 boys –
Pricey!!! But seems to work after only one use!
Not using conditioner when my hair is so damaged seemed crazy! I usually put quite a bit of conditioner on my hair to be able to comb through it.I bought the bigger size and it’s REALLY small for the price. I saved a little money by choosing “subscribe and save” $67.50 instead of $75. I used the shampoo, 3 pumps of this & 4 drops of the oil. Surprisingly with only 3 pumps I was able to get my brush through easily! It didn’t look like enough. Nor did my hair instantly feel smooth when applying. So definitely wait the 4 minutes before combing it through.My hair is fairly thick, about 1/2 way down my back and I recently bleached it from my natural brown to blond. I bought the shampoo/ conditioner & oil. My hair is so damaged after bleaching it. 🙁 I’ve tried several recommendations to get it healthy again. Mondo & others haven’t worked. So I was up to try this!It felt softer after using it for the first time! There isn’t much scent and my hair isn’t greasy. I’ll use it 4-6 more times and hopefully my hair will look much healthier as promised. I live where it’s fairly humid. If this works well for that, it’ll be worth it!Update 9/8/25: It’s really great!!! this brand has saved my hair! I especially love using this “conditioner” after rising my hair from swimming at the waterpark. I don’t use this every time I wash my hair bc it’s just too expensive for my long hair. But I bought the regular conditioner and I finally have healthier looking hair again after frying it, by coloring it blonde (with bleach) a few times.
AmazoningTooMuchxoxoxo –
Magic hair potion, backed by research
Magical. They put so much R&D into their products and I can see that in full force when using anything from the K18 line. Really incredible – makes my hair so smooth and removes any tangles.It takes time to get used to skipping conditioner in the shower (which you must skip to use this) but my results have been great so I’ll continue to do so every time I use this treatment. I use it about 4-6 times a month.I would love if this had a nice scent to it or if it was completely scentless but it’s fine as it is – doesn’t have a bad scent. I’ve been using this for more than 6 months…No weird reactions – each application has worked well!
Jasmine Munoz –
Worth the money!
THIS stuff has changed my hair! It’s no longer frizzy, the ends hold moisture so much better. Make sure to use it the way it says though because it can be heavy on fine hair if you overuse it. It does NOT make my hair oily, I actually bought the K18 oil on top of this mask and it’s the cherry on top! This stuff is expensive but in my opinion worth the money!
Leeann Page –
Works well. Too expensive for me
Works well but is pretty expensive for the amount of product you get. I have long thick hair so this did not last long.
Cliente Amazon –
Es muy caro para la cantidad de producto que viene pero merece la pena. He sufrido varios crímenes contra mi pelo este año y me está ayudando a recuperar el buen aspecto. Una vez que el pelo está estropeado es difícil repararlo pero al menos si que aparenta más sano. Lo recomiendo.
reddesign –
Second purchase now, and is impressive when using and left in hair as recommended. Styles well, and leaves hair soft and silky as opposed dry and bushy. However, the next day you would never know, so undecided if would purchase again a third time.
Stella –
Pat –
This product is actually worth the price. You can see improvement in your hair from the first application and it keeps getting better each time. My hair feels like it used to feel when I was young. Shiny and smooth. Very satisfied. Will buy again.
Illa karla Ramos Araújo –
fortalece bastante. com certeza vou comprar de novo.