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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
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Leave-In Molecular Hair Mask, Repairs Dry or Damaged Hair, Reverse Hair Damage from Bleach, Color, Chemical Services & Heat
$75.00
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K18 Leave-In Molecular Hair Mask, Repairs Dry or Damaged Hair, Reverse Hair Damage from Bleach, Color, Chemical Services & Heat

4.3 4.3 out of 5 stars 17,973 ratings
K18
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$29.00 $56.86 per Fl Oz
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0.51 Fl Oz (Pack of 1)
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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 & 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)
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K18 PEPTIDE PREP™ Color-Safe Detox Clarifying Shampoo, Non-Stripping, pH-Optimized Cleanse, Removes Product Buildup, Dirt, Oi
$38.00 ($4.47/Fl Oz)
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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. 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

  4. k18

    reverse hair damage

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

  5. 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
17,973
4.3 out of 5 stars
17,973
4.4 out of 5 stars
737
4.4 out of 5 stars
774
4.6 out of 5 stars
844
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; 0.07 ounces
  • Item model number ‏ : ‎ K18-31007
  • UPC ‏ : ‎ 858511001289 746559900490 858511001371
  • Manufacturer ‏ : ‎ K18
  • ASIN ‏ : ‎ B09HR5KSR8
  • Customer Reviews:
    4.3 4.3 out of 5 stars 17,973 ratings

Looking for specific info?

Customer reviews

4.3 out of 5 stars
4.3 out of 5
17,973 global ratings

Customers say

Customers like the ease of use, shine, and quality of the conditioner. They mention that it's easy to manage, gives hair a nice shine, works really nice, and that it does a miracle. Customers are also happy with softness. That said, some complain about the value and size. Opinions are mixed on dryness and effect on hair.

AI-generated from the text of customer reviews

704 customers mention551 positive153 negative

Customers like the quality of the conditioner. They say it's amazing, fabulous, and worth every cent. Some say it does a miracle and efficiently does the job of conditioner.

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

"...The K-18 mask has done wonders with refreshing my coils and bringing it back to life. After 4 washes, it's bouncy, shiny, and softer...." 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

"...Wow! It did a miracle. After this experience I ordered this product and used it this morning. I have semi long light blond hair (colored)...." Read more

382 customers mention362 positive20 negative

Customers find the conditioner soft, smooth, and silky. They say it makes their hair manageable and smooth. Some mention that it adds texture when dry.

"...I’m really genuinely impressed at how soft, manageable, and healthy looking my hair looks now...." Read more

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

"...After 4 washes, it's bouncy, shiny, and softer.I will say, what also helps is using quality haircare products as well...." Read more

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

226 customers mention203 positive23 negative

Customers like the shine of the conditioner. They say it makes their hair look healthier, smoother, and silkier. They also mention that it keeps their hair hydrated and gives it a nice shine and polish. Overall, customers are satisfied with the product's shine and quality.

"...I’m really genuinely impressed at how soft, manageable, and healthy looking my hair looks now...." Read more

"...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

"...After 4 washes, it's bouncy, shiny, and softer.I will say, what also helps is using quality haircare products as well...." Read more

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

168 customers mention159 positive9 negative

Customers find the conditioner easy to use. They say it's easy to apply, comb through, and style. They also say the instructions are important.

"...I’m really genuinely impressed at how soft, manageable, and healthy looking my hair looks now...." Read more

"...treatment is free from sulfates, parabens, and phthalates, making it a safer and healthier choice for my hair...." Read more

"...The application process is simple and convenient...." Read more

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

419 customers mention283 positive136 negative

Customers are mixed about the effect of the conditioner on their hair. Some mention that it dramatically restored their hair and made it more manageable. However, others say that it made their hair feel greasy and heavy, and that it didn't improve the quality in a dramatic way.

"...But within 2 uses, this product has transformed my hair...." Read more

"...In just 4 minutes, this revolutionary treatment works wonders to reverse hair damage and restore your locks to their former glory...." Read more

"...If you use too much, your hair will look greasy...." Read more

"...The mask effectively reverses the damage caused by bleach, color, chemical services, and heat, which is exactly what I was looking for...." Read more

156 customers mention51 positive105 negative

Customers have mixed opinions about the dryness of the conditioner. Some mention that it helps to restore moisture and leave their hair soft and manageable, while others say that it causes some dryness and leaves their hair dry and frizzy.

"my hair was limpy, lifeless, too dry after watching and too oily after one day. I think last time I had high lights my hair got fried!..." 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

"...the K18 Leave-In Repair Hair Mask Treatment is a powerful solution for repairing dry or damaged hair...." Read more

"...I blow dried my hair and it feels soft, still a little dry at the ends but I need a trim. No frizz...." Read more

459 customers mention33 positive426 negative

Customers find the value of the conditioner to be poor. They mention that it's pricey, small for the price, and not practical for everyday use.

"...The price point is hard to stomach, but I will continue to use this due to the results." 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

"...I’d buy this stuff more often but the price is expensive so I buy it when I’m out." Read more

"...hair and would highly recommend using it but I do not think it’s cost-effective...." Read more

135 customers mention26 positive109 negative

Customers are dissatisfied with the size of the conditioner. They mention that it's a very small bottle, the size a nail polish bottle, and that the package is small. Some say that the bottle is only half full.

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

"...The size is small and as you need a few pumps per use I don’t think it’s worth the price." Read more

It’s not a miracle product but it’s nice
4 Stars
It’s not a miracle product but it’s nice
I’d say that this product efficiently does the job of conditioner and leave in conditioner but in one step. It doesn’t perfectly get rid of frizz but my hair feels hydrated and nice. I have a lot of thick, long hair and I require 3 (sometimes 3.5) pumps. My hair does feel nice especially having used it a few weeks now (3x a week no washing in between). Is it 75 dollars for what I imagine will only be 2.5 months of product level nice? I would say no except for the fact that this provides convenience. If you have a lot of hair like me, then you’re use to how time consuming showering on a hair wash night can be. Shampooing it is laborious and after combing conditioner into your hair you have to wait a minimum of 5 minutes to give it time to absorb before washing it out. Then you must drench your hair in leave in conditioner as well as maybe a anti frizz oil after it dries. This product makes showers faster and I don’t need as much product just this one very expensive product. I might still need some anti frizz oil but I can get away with less of it- (no oil used in the photos). I didn’t bother uploading a before photo because I have good hair days and bad hair days and I’d say these product results are comparable to good hair days where I condition properly. It’s expensive but much easier to get good hair days- it’s a trade off between time vs money.Other hair health context: I do not use heat on my hair except for when it is professionally cut and blow dried 2 times a year. I die my grays my natural color 2 times a year but it’s darker so theirs no lifting. I did read in the comments that you need to heat this product up in your hands before using to activate it even though it doesn’t explain on the bottle. I may try a brief blow dry to see if the product “activates” better and will update the review if it does.
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Top reviews from the United States

Alexandra
5.0 out of 5 stars Great product
Reviewed in the United States on April 19, 2024
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
I didn’t really have high expectations, as I figured this was just another overhyped expensive hair mask. But within 2 uses, this product has transformed my hair. I’m really genuinely impressed at how soft, manageable, and healthy looking my hair looks now. The price point is hard to stomach, but I will continue to use this due to the results.
11 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!
26 people found this helpful
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Devon Jackson
5.0 out of 5 stars Consistency is Key
Reviewed in the United States on April 29, 2024
Size: 0.51 Fl Oz (Pack of 1)Verified Purchase
I have neglected my hair (for lack of better phrasing) since putting my hair into multiple knotless braids and passion twists and noticed how sad my natural hair looks.

For context, I have 4a hair with the nape of my neck being 3c. I also have thin, fine hair so it does not take much to detangle. With this, my hair always look shrunken and mullet-like due to the uneven textures.

The K-18 mask has done wonders with refreshing my coils and bringing it back to life. After 4 washes, it's bouncy, shiny, and softer.

I will say, what also helps is using quality haircare products as well. I started using Kenra professionals curl line and also used their triple repair bond shampoo and that helps as well.

It's still a learning curve, but I am happier I did this mask.

Wished it was not so small and costly.
One person 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.
99 people found this helpful
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Top reviews from other countries

Translate all reviews to English
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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Candace M
5.0 out of 5 stars Great Product, Great Price
Reviewed in Canada on April 29, 2024
Size: 50 mlVerified Purchase
The product is stand alone FANTASTIC for hair repair and healthy maintenance.
The price on Amazon for the product is SIGNIFICANTLY cheaper than it retails anywhere else.
One person found this helpful
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Bere sotelo
5.0 out of 5 stars Ayuda
Reviewed in Mexico on April 29, 2024
Size: 5.07 Fl Oz (Pack of 1)Verified Purchase
Me gustó mucho
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Marcos Leyva
5.0 out of 5 stars Mascarilla
Reviewed in Mexico on April 21, 2024
Size: 50 mlVerified Purchase
Buen producto
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Sarah
5.0 out of 5 stars Very expensive but helping me alot!
Reviewed in Canada on April 2, 2024
Size: 5.07 Fl Oz (Pack of 1)Verified Purchase
This product Is very expensive but in large container is best value for money. I am attempting to quit dying my hair and let it grow out after severe bleach and color damage and needed something to invest in to help the quality of whatever hair I had left on my head. This product does work. My hair feels so much better and I am only 3 weeks quitting hair dye. This is worth it highly.
3 people found this helpful
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