K18 Leave-In Molecular Hair Mask, Repairs Dry or Damaged Hair, Reverse Hair Damage from Bleach, Color, Chemical Services & Heat
$29.00
Price: $29.00
(as of Aug 15, 2025 19:33:02 UTC – Details)
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: #163 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 24,660 ratings 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); } }); });
Customers say
Customers find the hair mask effective at making hair soft, smooth, and shiny, with one noting it’s silky without being heavy. The product helps recover from extremely dry and damaged hair and stops breakage, though opinions on hair health are mixed – some say it helped repair their hair while others report no improvement. The bottle size receives mixed feedback, with some appreciating that a small amount goes a long way, while others find it too small. While some customers say it makes their hair less dry, others report their hair becoming very dry after use.
9 reviews for K18 Leave-In Molecular Hair Mask, Repairs Dry or Damaged Hair, Reverse Hair Damage from Bleach, Color, Chemical Services & Heat
Add a review
Related Products
$29.00
GG –
OMG! OMG ! OMG! K-18 FULFILLS ITS CLAIMS Read on!
Iâm over 55 and have spent decades trying everything â from $9 to $144 per product â 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 donât). K18 is the first and only product that actually delivered on its promise to repair â not just coat â my hair. I was fully prepared to return this if it did not make a difference. It did.This isnât 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 â thatâs 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 â something Iâve 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 Floridaâs 90°+ heat and humidity, it holds up â and Iâm not using anything else but K18. A friend even asked to try it after seeing my results.Itâs expensive, but absolutely worth it. Iâve already bought the larger bottle. Iâm sticking with K18 â 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
Christopher E –
Fixed My Bleached Hair in One Use â Actual Hair Resurrection
LITERALLY SAVED MY HAIR IN ONE USE â MIRACLE IN A BOTTLEI donât usually leave reviews, but I would actually fight someone over this product if it ever got discontinued. Like. Thatâs how serious I am. I bleached the living life out of my hair recentlyâthink straw, think crunchy ramen noodle ends, think âoops I fried it but I still want it to look good.â I used K18 once, and I swear to god my hair looked like I had never damaged it at all. ONE USE. Not three. Not six. One.This isnât your average deep conditioner or protein mask. This is full-on biotech magic. The science behind it is realâthis isnât marketing fluff. It uses a patented peptide (K18Peptideâ¢) that literally reconnects broken polypeptide chains in your hair. Like, it doesnât just make your hair feel soft temporarily. It rebuilds it. Weâre talking actual molecular repair. You feel the difference IMMEDIATELY. And even better? The results just get better the more you use it.No rinsing, no long routines. You just shampoo, skip conditioner, towel-dry, use 1â3 pumps depending on your hair length, and then wait 4 minutes. THATâS IT. It absorbs fast, isnât heavy, doesnât make your roots oily, and doesnât coat your hair in a waxy film like other products. My hair went from stringy and dead to soft, bouncy, shiny, and fully alive again.Also? A little goes a long way. Itâs expensive, yeah, but it lasts forever and genuinely does what it says. Iâd rather spend money once on something that works than keep buying cheap products that do nothing but mask the damage.TL;DR â If your hair is damaged from bleach, color, heat, or just life, BUY THIS. Itâs not hype. Itâs not overrated. Itâs the best hair product on the planet and deserves to be in every single âbest ofâ list forever. Iâve tried Olaplex, Iâve tried everythingânothing touches this. K18 is THAT GIRL.
JoMarie –
Would buy again
Best hair mask you can get for truly damaged hair . Pricing is definitely up there but I think it is worth it . A little goes a long way so I wouldnât over do it . It is best if you can section your hair and do a pump for each section. (I have a lot of hair so I just try to do left and right side of my head , then back in sections) there isnât really a scent – itâs pretty light .
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 itâs REALLY small for the price. I saved a little money by choosing âsubscribe and saveâ… 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 didnât 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. 🙁 Iâve tried several recommendations to get it healthy again. Mondo & others havenât worked. So I was up to try this!It felt softer after using it for the first time! There isnât much scent and my hair isnât greasy. Iâll use it 4-6 more times and hopefully my hair will look much healthier as promised. I live where itâs fairly humid. If this works well for that, it’ll be worth it!
Milom –
Muy buen producto, deja el cabello lindo. Me hice unas babylights y mi cabello se maltrato mucho con la decoloracion. Se enreda mucho despues de lavarlo aun usando acondicionador. Este producto se aplica sin haber aplicado acondicionador, asi que tenia mis dudas de que fuera a funcionar, pero para mi sorpresa, fue mas facil desenredarlo y lo dejo secar natural, y mi cabello queda muy buen!! Sin frizz, sin sentirse pesado.
Cliente Amazon –
Es muy caro para la cantidad de producto que viene pero merece la pena. He sufrido varios crÃmenes contra mi pelo este año y me está ayudando a recuperar el buen aspecto. Una vez que el pelo está estropeado es difÃcil 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 –
Â
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.