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K18

K18 Leave-In Repair Hair Mask Treatment to Repair Dry or Damaged Hair - 4 Minutes to Reverse Hair Damage from Bleach, Color, Chemical Services and Heat

  • Based on 16,074 reviews
Condition: New
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$29.00 Why this price?
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Availability: In Stock.
Fulfilled by Amazon

Arrives Tuesday, Jun 4
Order within 4 hours and 14 minutes
Available payment plans shown during checkout

Size: 0.51 Fl Oz (Pack of 1)


Brand: K18


Item Form: Cream


Hair Type: dry, All


Product Benefits: Reverses damage in 4 minutes


Age Range (Description): Adult


Product Dimensions ‏ : ‎ 3.15 x 1.57 x 1.57 inches; 0.07 ounces


Item model number ‏ : ‎ K18-31007


UPC ‏ :


Manufacturer ‏ : ‎ K18


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jun 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.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Works Great!
Size: 50 ml
My hairdresser recommended this to me. I have gray hair that is permed. I use it per the instructions and it controls my frizz and makes my hair softer. My perm still looks great and it does not diminish the curl of my perm. Expensive but worth the money. You don't need to use alot.....less is more!
Reviewed in the United States on February 28, 2024 by Ellie Toney

  • Superb hair treatment!
Size: 0.51 Fl Oz (Pack of 1)
I received this product yesterday and used it after my shower today. My hair is smooth, soft, and full! The frizz is gone! I have tried a LOT of hair products, some of which are OK, but THIS one... this one does wonders. As others have pointed out, it is pricey, but in this case, you really do get what you pay for. Also, you don't need to apply a lot of it. Now I am not sure what I am going to do with the other hair products. ... show more
Reviewed in the United States on March 10, 2024 by KaPua_M

  • Miraculous. Seriously.
Size: 0.51 Fl Oz (Pack of 1)
I have waist-length, highlighted hair. I was considering a major haircut, as my hair was just getting more and more frizzy and damaged over time. One single treatment with k18 (they suggest 1 or 2 pumps, I have a LOT of hair so I used 6) and my hair is sleeker, tangles much less, easier to comb out, looks better, feels slippery and smooth. No moisturizer I've ever used has had this kind of affect. I did the treatment a month ago, and the gains are lasting. Truly revolutionary. This will allow me to keep my length. The bottle is tiny, but so worth it for me. ... show more
Reviewed in the United States on February 29, 2024 by J. Culver

  • Effective but Pricey
Size: 0.51 Fl Oz (Pack of 1)
I recently tried the K18 Leave-In Repair Hair Mask Treatment, and while it definitely delivers on its promise to repair dry or damaged hair, I have to admit that the price tag is a bit steep for the size of the bottle. Let's start with the positives. This treatment truly works wonders on my hair. After just a few uses, I noticed a significant improvement in the texture and overall health of my hair. It feels softer, smoother, and looks much healthier. The mask effectively reverses the damage caused by bleach, color, chemical services, and heat, which is exactly what I was looking for. The application process is simple and convenient. I just apply the mask to my damp hair, It's a quick and easy addition to my hair care routine. However, I do have to mention that the price of this product is quite high considering the size of the bottle. While I understand that quality comes at a cost, I was a bit disappointed with the amount of product I received for the price I paid. It would be great if the company could adjust the pricing to make it more affordable for regular use. Despite the price concern, I have to say that the K18 Leave-In Repair Hair Mask Treatment is effective and delivers results. If you're willing to invest in your hair care routine and don't mind the higher price point, this product is worth considering. Just be aware of the bottle size and its impact on the overall value for money. In conclusion, the K18 Leave-In Repair Hair Mask Treatment is a powerful solution for repairing dry or damaged hair. It works wonders, but the price may be a deterrent for some. If you're willing to splurge a bit, you won't be disappointed with the results. ... show more
Reviewed in the United States on December 2, 2023 by Maria Fay

  • This stuff is sorcery!
Size: 0.51 Fl Oz (Pack of 1)
Seriously, this is the best hair repair product I have used in years. So much better than Olaplex. It is ridiculously pricey but so worth it. My hair was destroyed by bleach and the unforgiving iron but it has come back to life after using this 5 or 6 times. I was skeptical to not use conditioner at all and only use 3 pumps of this (I usually use conditioner twice), but I am a believer now. My hair hasn’t looked this healthy in months. I used to apply 3 different leave ins before. Now, I just use 3-4 pumps of K18. It’s really amazing. Just try it. ... show more
Reviewed in the United States on February 4, 2024 by OneStopWit

  • So far so good
Size: 0.51 Fl Oz (Pack of 1)
Really expensive. Especially for the size. However, so far it seems to do what it claims. My ends are super dry from bleach. This makes them a lot softer and less frizzy. I use it when I get out of the shower. And just let my hair air dry. And I only use it from the middle of my hair down to my ends. Hair is long (lower back). Split it in half and use 2 pumps on each side. ... show more
Reviewed in the United States on February 12, 2024 by s w s w

  • AMAZING BUT…. It’s only half as much as you think you’re getting.
Size: 50 ml
The media could not be loaded. I absolutely love this product but I am super super disappointed in the fact that when you buy the bottle for $75, it is only half the amount you think it is. You can watch my video and see what I’m talking about but there’s a hole in the bottom of the container and it’s just air half of it. Also, they should have included in their instructions to rub the product in your hands for 30 seconds or until pasty white before you put it in your hair. It activates it. It’s a major step. Besides all of that I really love this product and it has seriously helped my hair and would highly recommend using it but I do not think it’s cost-effective. Especially with the company duping people into thinking they are getting more product than they are. That’s bull crap. I will probably buy it again, but use it very sparingly. But it is a great product and if you have really damaged hair, I would definitely buy this if your hair matters to you a lot. I will reach out to the company and ask if they can offer more product for the amount that they are charging because that’s just kind of ridiculous. I would’ve given this product a five stars if it wasn’t for that. ... show more
Reviewed in the United States on March 3, 2024 by Janelle

  • Great product
Size: 0.51 Fl Oz (Pack of 1)
This is a great product, however, if you do not follow the directions it does not work. I tried this product a while ago and all it did was make my hair feel greasy and heavy. I gave it to my son who has similar hair and he loved it. I clearly did not follow the directions properly, so I bought it again and applied exactly, I mean exactly as directed and it worked amazingly. My hair is naturally curly towards the frizzy side and I have a lot of it. It is thin though, so I have to be careful with products. Do not use conditioner! Just shampoo, the more clarifying the better. Only use a little of this after washing, then add a tiny amount more if needed. Leave in for 4 minutes with your crazy snarly just out of the towel hair. Then comb out and proceed as usual with your styling products. I did not notice a difference if I dried my hair or not. Do not use for more than the recommended initial days either. I found 4 worked well for me. Then once a week after, but it is winter, so will probably use less frequently in the summer. I highly recommend. ... show more
Reviewed in the United States on February 4, 2024 by JudyGG

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