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Add an Accessory:
Molecular Repair Hair Oil, Weightless Oil for Stronger, Healthier Hair, Suitable For All Hair Types
$65.00
Added to Cart
K18 Gentle Yet Effective Cleansing Shampoo
$36.00
Added to Cart
K18 Detox Product Buildup Dirt Oils Metals Shampoo
$38.00
Added to Cart
Leave-In Molecular Hair Mask, Repairs Dry or Damaged Hair, Reverse Hair Damage from Bleach, Color, Chemical Services & Heat
$75.00
Added to Cart

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

K18
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$29.00 $56.86 per Fl Oz
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Purchase options and add-ons

Brand K18
Item Form Cream
Hair Type dry, All
Product Benefits Our K18PEPTIDE™ repairs hair at a molecular level across multiple types of bonds, restoring hair health for all See more
Age Range (Description) Adult

Additional Details

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Description

This leave-in treatment mask works on the molecular level to reverse hair damage in just 4 minutes. It tackles daily damage with immediate and lasting results to restore strength, softness, smoothness and bounce to hair

Benefits

Our K18PEPTIDE™ repairs hair at a molecular level across multiple types of bonds, restoring hair health for all

Suggested Use

Shampoo, do not condition. Towel-dry thoroughly. Apply 1-3 pumps of K18 mask & massage through hair. Let treatment sit in the hair for 4 minutes. Do not rinse
Complete the regimen
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K18 Leave-In Molecular Hair Mask, Repairs Dry or Damaged Hair, Reverse Hair Damage from Bleach, Color, Chemical Services & Heat

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K18 Leave-In Molecular Hair Mask, Repairs Dry or Damaged Hair, Reverse Hair Damage from Bleach, Color, Chemical Services & He
$29.00 ($56.86/Fl Oz)
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K18 PEPTIDE PREP™ Smoothing Color-Safe Shampoo, pH-Optimized, For Gentle Yet Effective Cleansing, 8.5 Fl Oz
$36.00 ($4.24/Fl Oz)
Get it as soon as Saturday, Jul 27
In Stock
Sold by K18 Hair and ships from Amazon Fulfillment.
+
K18 PEPTIDE PREP™ Color-Safe Detox Clarifying Shampoo, Non-Stripping, pH-Optimized Cleanse, Removes Product Buildup, Dirt, Oi
$38.00 ($4.47/Fl Oz)
Get it as soon as Saturday, Jul 27
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From the brand

Previous page
  2. k18

    science backed haircare

    Our professional stylist-approved biotech breakthroughs deliver your healthiest hair.

    Engineered for all hair types.

  3. sold exclusively
  4. K18
    K18 PEPTIDE PREP Color Safe Detox Clarifying Shampoo -Skincare-inspired Ingredients to Nourish Ha...
    K18 PEPTIDE PREP Cleansing pH Maintenance Color Safe Shampoo for Daily Use - Powerful yet Non-str...
    K18 Molecular Repair Hair Oil - Weightless Oil Strengthens, Repairs Damage, Reduces Frizz, Improv...

    Your Healthy Hair Routine

    Visit the Store

  5. k18

    reverse hair damage

    K18 molecular repair is cilincally proven to reverse damage from bleach, color, and chemical services in 4 minutes.

  6. Who are we?

    We're a biotech-powered brand breaking the rules on haircare. Beloved by the PRO community and at-home users in 100+ countries, 20+ billion Tik Tok views, and 25+ prestigious awards, our growing line up of intentional, science backed haircare is all about unlocking next-level expression for all.

    What makes our products unique?

    Our K18PEPTIDE-powered innovations were born in the biotech lab to radically simplify your routine and deliver your cleanest, healthiest hair.

Next page

Product Description

hair repair mask treatment for damaged hair

**Clinical studies supporting our claims were done at the University of Minho in Portugal Jan 2021

hair repair mask treatment for damaged hair

*World Patent No WO2015056216A2

hair repair in 4 minutes
hair repair mask treatment for damaged hair
hair treatment mask to repair damaged hair
hair treatment to repair damaged hair from heat and chemicals
K18 hair repair mask treatment for damaged hair K18 50ml hair repair mask treatment for damaged hair hair oil k18 k18
15ml Hair Repair Mask for Damaged Hair 50ml Hair Repair Mask for Damaged Hair Molecular Hair Repair Oil PEPTIDE PREP pH Maintenance Shampoo PEPTIDE PREP Detox Shampoo
Customer Reviews
4.3 out of 5 stars
12,596
4.4 out of 5 stars
6,464
4.4 out of 5 stars
860
4.5 out of 5 stars
894
4.6 out of 5 stars
972
Price $29.00 $75.00 $65.00 $36.00 $38.00
Size 15ml 50ml 30ml 8.5oz 8.5oz
Hair Mask ✓ ✓
Hair Oil ✓
Shampoo ✓ ✓
Molecular Repair ✓ ✓ ✓
Heavy Duty Cleanse ✓
Everyday Cleanse ✓
Used by Professionals ✓ ✓ ✓ ✓ ✓
At Home Use ✓ ✓ ✓ ✓ ✓

Product details

  • Product Dimensions ‏ : ‎ 3.15 x 1.57 x 1.57 inches; 1 ounces
  • Item model number ‏ : ‎ K18-31007
  • UPC ‏ : ‎ 858511001289 746559900490 858511001371
  • Manufacturer ‏ : ‎ K18
  • ASIN ‏ : ‎ B09HR5KSR8
  • Customer Reviews:

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Customer reviews

4.3 out of 5 stars
4.3 out of 5
12,596 global ratings

Customers say

Customers like the softness of the conditioner. They say it makes their hair feel silky and bouncy. Customers are also satisfied with the quality, health, and appearance. However, some customers feel the value is beyond expensive and not practical for everyday use. They also mention that the size is very small. Opinions are mixed on the effect on hair and moisture.

AI-generated from the text of customer reviews

Select to learn more
QualitySoftnessAppearanceHealthEffect on hairMoistureValueSize
480 customers mention "Quality"400 positive80 negative

Customers like the quality of the conditioner. They mention it does all it says it will and more, it lasts a long time, and it strengthens from within. Some say it's able to save their breakage and give them shine and bounce. Overall, customers are happy with the product's quality.

"...product changed everything, leaving my hair so manageable, silky, soft, body and no frizz. I cannot say enough good things about K18. Dawn" Read more

"...– it penetrates deep into the hair shaft, repairing and strengthening from within...." Read more

"...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." Read more

"...or ill just go try my favorite hydrotherapy mask. it works wonders." Read more

327 customers mention "Softness"307 positive20 negative

Customers are satisfied with the softness of the conditioner. They mention that it makes their hair feel and look silky and bouncy. Some say that their hair has never looked so soft and smooth. Overall, most are happy with the product's ability to improve the texture and overall health of their hair.

"...this product changed everything, leaving my hair so manageable, silky, soft, body and no frizz. I cannot say enough good things about K18. Dawn" Read more

"...My hair feels unbelievably soft, smooth, and rejuvenated...." Read more

"...It makes my hair feel so soft and it strengthens my hair. If your hair is damaged from bleaching, I would highly suggest using this!..." Read more

"...After just a few uses, I noticed a significant improvement in the texture and overall health of my hair...." Read more

143 customers mention "Appearance"122 positive21 negative

Customers like the appearance of the conditioner. For example, they say it makes their hair look shiny, healthy, and nice. Some mention that it makes hair feel thinner. Overall, most are satisfied with the product's ability to give their hair shine and bounce.

"...My locks are shinier, stronger, and more resilient than ever before...." Read more

"...It makes my hair shiny and soft. My biggest complaint is that you get such a small amount for the price. It is very expensive." Read more

"...Great shine & manageability with no frizz. I didn’t put any other product in it...." Read more

"...I have noticed my hair is softer, shinier, less frizzy, and easier to comb through...." Read more

119 customers mention "Health"119 positive0 negative

Customers are satisfied with the health of their hair after using the conditioner. They mention that it makes their hair look fuller and healthier, and that it provides a ton of shine. Some say that they have noticed a significant improvement in the overall health and appearance of theirhair since using the product.

"...I've noticed a significant improvement in the overall health and appearance of my hair since incorporating the K18 treatment into my routine...." Read more

"...It feels softer, smoother, and looks much healthier...." Read more

"...how effectively it has reversed the damage, making my hair look and feel revitalized...." Read more

"...Market!!!! K18 is total magic for over processed hair! It made my hair healthy, provides a ton of shine and eliminates frizz...." Read more

252 customers mention "Effect on hair"132 positive120 negative

Customers are mixed about the effect of the conditioner. Some mention that it helps their hair so much, and the moisture it gives it is fantastic. They say it's total magic for over processed hair, and has their hair feeling better after just one use. However, others say that it'd be better off using another product.

"...frizzy and dry, but this product changed everything, leaving my hair so manageable, silky, soft, body and no frizz...." Read more

"...while all the front bits are nice and soft, I do see that my hair is “producty” at the root...." Read more

"...Plus, the effects are cumulative, so the more you use it, the better your hair looks and feels over time...." Read more

"...My natural gray/blonde was MIA, and my hair was SEVERELY damaged. It is fine textured and shoulder length...." Read more

115 customers mention "Moisture"45 positive70 negative

Customers are mixed about the moisture of the conditioner. Some mention that it helps combat dryness, and is perfect for anyone battling dry, unruly hair. However, others say that it made their hair really dry and tacky.

"...into it so it came out of the bleach still pretty healthy but it felt super dry, and I still had to bleach it again...." Read more

"...to blow dry, I could tell immediately my hair was softer and blow drying was easier. Hair was less frizzy, softer to the touch after 1st use...." Read more

"...It is very thin and dry. So far I haven’t really noticed a big difference, but I’m hoping with continued use that I will see some improvement." Read more

"...Instead it was chunky and partially dried out...." Read more

454 customers mention "Value"85 positive369 negative

Customers are dissatisfied with the value of the conditioner. They mention that it's beyond expensive, the packaging is small, and it'd not be practical for every day use. They also say that the directions didn't help and that they didn're not getting great results.

"...It is expensive and I have long hair so it is doubly expensive, but so worth it...." Read more

"...My biggest complaint is that you get such a small amount for the price. It is very expensive." Read more

"...to repair dry or damaged hair, I have to admit that the price tag is a bit steep for the size of the bottle...." Read more

"...Hair was less frizzy, softer to the touch after 1st use. The price is high for what you get...." Read more

147 customers mention "Size"25 positive122 negative

Customers are dissatisfied with the size of the conditioner. They mention that it's a small bottle and you only use a little.

"...I think the bottle is too small and it is not a magic solution as advertised" Read more

"...I can't recommend this enough!! The bottle is very small for the price but it's worth it!!" Read more

"...It is a very small bottle." Read more

"I used it once and it worked well. But the bottle is soooo small I’m not sure how long it will last." Read more

Works but expensive and very little product
4 out of 5 stars
Works but expensive and very little product
Love this product cause it works but also so annoyed at how expensive it is. They don’t even do you the decency of filling it up. Hard to see in the pic but I cut it open to try and get all product out and it’s not even halfway filled. Also a lot left in the bottle even though it wasn’t coming out of the pump. Still gonna buy more cause it’s an amazing product.
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Top reviews from the United States

Dawne
5.0 out of 5 stars You cannot find anything better than this!
Reviewed in the United States on June 8, 2024
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
My hair stylist recommended this product for my hair and it was such a super product to anything else I have used. It is expensive and I have long hair so it is doubly expensive, but so worth it. As I aged my hair became really frizzy and dry, but this product changed everything, leaving my hair so manageable, silky, soft, body and no frizz. I cannot say enough good things about K18. Dawn
46 people found this helpful
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Ashley G.
5.0 out of 5 stars Rescue Your Hair with K18 Leave-In Repair Hair Mask Treatment
Reviewed in the United States on March 23, 2024
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
If you've ever struggled with dry, damaged hair from bleach, color treatments, or heat styling, then the K18 Leave-In Repair Hair Mask Treatment is your new holy grail product. In just 4 minutes, this revolutionary treatment works wonders to reverse hair damage and restore your locks to their former glory.

I was initially skeptical about the claims of this product, but after just one use, I was absolutely blown away by the results. The formula is unlike anything I've ever tried before – it penetrates deep into the hair shaft, repairing and strengthening from within.

What I love most about the K18 treatment is its versatility. Whether your hair is suffering from the effects of bleach, color treatments, chemical services, or heat styling, this mask has got you covered. It's the ultimate multitasker, addressing a wide range of hair concerns with just one product.

The application process is quick and easy. After shampooing (skip conditioner) when I'm out of the shower, I simply apply the treatment to towel dried hair, focusing on the most damaged areas. Then, I leave it in for 4 minutes and continue with my other styling products and then blow-dry. My hair feels unbelievably soft, smooth, and rejuvenated. The label suggests using it for the first 4-6 shampoos and then only using as needed.

I've noticed a significant improvement in the overall health and appearance of my hair since incorporating the K18 treatment into my routine. My locks are shinier, stronger, and more resilient than ever before. Plus, the effects are cumulative, so the more you use it, the better your hair looks and feels over time.

I also appreciate that this treatment is free from sulfates, parabens, and phthalates, making it a safer and healthier choice for my hair. Plus, it's cruelty-free and vegan, so you can feel good about using it.

In conclusion, I can't recommend the K18 Leave-In Repair Hair Mask Treatment enough. If you're tired of dealing with dry, damaged hair, do yourself a favor and give this product a try. You won't be disappointed!
91 people found this helpful
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Misha
5.0 out of 5 stars Makes my hair feel amazing!
Reviewed in the United States on June 27, 2024
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
I love this product! After I wash my hair I use one pump of this product and run it through my hair. It makes my hair feel so soft and it strengthens my hair. If your hair is damaged from bleaching, I would highly suggest using this! It makes my hair shiny and soft. My biggest complaint is that you get such a small amount for the price. It is very expensive.
3 people found this helpful
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Maria Fay
4.0 out of 5 stars Effective but Pricey
Reviewed in the United States on December 2, 2023
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
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.
156 people found this helpful
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teresita
5.0 out of 5 stars wow!
Reviewed in the United States on June 29, 2024
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
my stylist recommended me this product because i decided it was a good idea to perm my hair while having blonde, as i have done it before but i wasnt a blonde. i shouldve went to a salon lol but anyway my hair kinda got fried at the ends and started to shed i ended up trimming it. i should have waited cause this product seems to be working. it just arrived today and so far its made my hair softer than having some stiff burnt tips that i didnt want to go too short. hopefully it repairs it few more tries. or ill just go try my favorite hydrotherapy mask. it works wonders.
3 people found this helpful
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CJS
5.0 out of 5 stars Really Works!
Reviewed in the United States on June 10, 2024
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
I doubted this would work. But after a few minutes of starting to blow dry, I could tell immediately my hair was softer and blow drying was easier. Hair was less frizzy, softer to the touch after 1st use. The price is high for what you get. I will look regularly though and see if price drops on Amazon so I can buy few bottles. I'll be using this for sure for a long time!
15 people found this helpful
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Top reviews from other countries

Translate all reviews to English
Excelente compra . Desde el primer día de uso mejora tu postura . Lo recomiendo .
5.0 out of 5 stars Excelente mascarilla
Reviewed in Mexico on May 18, 2024
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
El precio es demasiado alto . Pero vale la pena 100%
3 people found this helpful
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Amazon Customer
5.0 out of 5 stars Expensive but worth it
Reviewed in Canada on April 29, 2024
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
The bottle is small but it lasts longer then you think and it really does make your hair so much healthier. Love this stuff.
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Audrey Lonni
5.0 out of 5 stars Excelente!
Reviewed in Brazil on February 3, 2024
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
Produto muito eficiente, que vale o alto custo. Atua revertendo o dano no fio capilar.
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Lana alyosif
5.0 out of 5 stars ممتاز
Reviewed in Saudi Arabia on July 16, 2024
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
روعه للشعر المصبوغ
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Alex
5.0 out of 5 stars Excellent produit
Reviewed in France on July 7, 2024
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
Excellent produit qui répare profondément . Je recommande +++++
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