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K18

K18 Leave-In Molecular Hair Mask, Repairs Dry or Damaged Hair, Reverse Hair Damage from Bleach, Color, Chemical Services & Heat

    • Based on 21,085 reviews
Condition: New
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$75.00 Why this price?

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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon
Arrives Saturday, Jan 4
Order within 16 hours and 50 minutes
Available payment plans shown during checkout

Size: 50 ml


Brand: K18


Item Form: Cream


Material Feature: Natural


Hair Type: Damaged


Product Benefits: Our K18PEPTIDE™ repairs hair at a molecular level across multiple types of bonds, restoring hair health for all See more


Product Dimensions ‏ : ‎ 3.54 x 1.57 x 3.54 inches; 3.2 ounces


Item model number ‏ : ‎ K18-31005


UPC ‏ : ‎


Manufacturer ‏ : ‎ K18


Country of Origin ‏ : ‎ USA


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jan 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Best leave in I've ever used!
Size: 0.51 Fl Oz (Pack of 1)
I never write reviews, but this is a product worth mentioning. This product has changed my hair game. I have been using for a few months & my long hair (to my hips) has never been softer. I can tell a major difference in the overall health of my hair. My hair is fine and it does not weigh it down. The price is a little higher than I like BUT if you want something that actually works its worth the price!! I would give more than 5 stars if possible! ... show more
Reviewed in the United States on November 4, 2024 by JB
    • A Former Scene-Queen's Best Tool
Size: 0.51 Fl Oz (Pack of 1)
Like many DIY hair enthusiasts, I did most of my trial and error on my teenage hair during my scene-queen days. As an adult, I've taken a bit less risk with my hair but I do still love changing it up with different vivids regularly! (It's not a phase, mom!) Jokes aside, I've done all sorts of processing on my hair in the last year. Level 7 blonde to a full level 10, to lilac, to deep purple, back to level 7/8 blonde, to blue, to copper, now burgundy. I tried K-18 for the first time after accidentally letting my ADHD get the best of me while doing my hair and leaving bleach (with 30 vol... I know... I know..) on for too long. There is no way around the need to cut off dead/fried ends in time, but K-18 made it so I cut off significantly less! In just 2-3 treatments, you almost couldn't tell anything had happened. The bottom half inch of my hair or so is the only portion that seems more damaged than the rest and K-18 is already working it's wonders. If you did the absolute most on your hair and need a temporary fix while you wait for growth to allow for more trimming, this is your best bet! Although pricey, a little goes a really long way. On shoulder-blade length hair, I only needed 2-3 pumps. I cut my hair just above my shoulders recently and now I only need 1-2 pumps. Admittedly, I don't follow the directions to the T. I struggle with not conditioning my hair as I live in a very dry, desert mountain climate and not-conditioning my 2A/2B hair just makes me look wild. Typically, what I do is shampoo as needed and deep condition (weekly), but every time my hair is damp, I use prayer hands to work product through the mid shaft/ends then let it air dry. ... show more
Reviewed in the United States on November 9, 2024 by Chacon
    • Two years later and my hair has never felt better!
Size: 50 ml
I’ve been on quite the hair journey. It started at my waist, and damaged from years of bleaching. Then the big chop, but continued processing so the split ends never quite went away. Finally I started using this perfectly as the instructions say for initial use then maintenance and Y’ALL there’s not a split end on my whole head now. Two years of growth and I have completely cut off everything processed and used this k18 treatment twice every week as recommended. My hair looks thicker (because no dead ends!), it’s super soft and smells sooooo good (I rub the excess from my palms on my neck like a perfume/lotion won’t lie), and it adds a nice shine to any styles you do after! To use it you just apply to slightly damp hair (there’s a sweet spot of wetness you gotta find) and just run it through your hair and use a brush to disperse. It also has detangling properties so it’s super easy. I have a thin straight hair type that likes to tangle so I normally don’t try to brush it wet but this is sooo silky. It’s expensive sure, BUT you use so little even for a LOT of hair. Using too much isn’t recommended so that’s another sweet spot. The little bottle lasts me about 6 months and the larger one over a year. I’ve bought both!! ... show more
Reviewed in the United States on November 5, 2024 by Lily
    • Pretty good!
Size: 0.51 Fl Oz (Pack of 1)
The product demonstrated satisfactory performance, albeit at a substantial cost. Despite meticulous adherence to the provided instructions, a significant portion of my hair, approximately four inches, had to be sacrificed in an attempt to salvage the damage. It is important to note that my hair had not undergone any extreme treatments such as bleaching. While the product did result in an improvement in hair texture, it did not live up to its promise of miraculous transformation. The initial application seemed promising, but the effects proved to be transient, with my hair reverting to its tangled and brittle state the following day. The product itself is relatively odorless. Given my hair type, which is on the finer side and was previously beyond my bust, I have had to cut it to around my collarbone length in order to eliminate the damage and start anew. I strongly recommend the use of henna as an alternative to conventional hair dyes, as I deeply regret my reliance on numerous box dyes. It appears that the positive effects of this product are short-lived, necessitating more frequent use than anticipated. ... show more
Reviewed in the United States on November 12, 2024 by Brittny Grimes
    • Would it work
Size: 50 ml
My wife has died her hair for more than 50 years. It was extremely damaged, then, and was falling out. So we took a Hail Mary, and tried the K18. It took several weeks, but her hair has stopped thinning, it is softer to the touch and the damage reduced significantly. We were worried, but we have reordered this and will continue to use. ... show more
Reviewed in the United States on December 15, 2024 by Robert W

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