Leave-In Molecular Repair Hair Mask

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Leave-In Molecular Repair Hair Mask
A leave-in treatment mask for all hair types that clinically reverses damage in four minutes. The ... Learn more

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Leave-In Repair Mask 5ml
  • Description

    A leave-in treatment mask for all hair types that clinically reverses damage in four minutes. The K18PEPTIDE™ works to repair damage from bleach, color, chemical services, and heat, restoring strength, softness, smoothness, and bounce to hair.

    This mask is powered by the patented K18PEPTIDE™, which is just the right size and molecular structure to reach the innermost layers of hair and re-connect broken keratin chains responsible for hair's strength and elasticity.

    Restores strength, softness, smoothness, and bounce
    Repairs damaged hair
    Easy leave-in formula delivers lasting results

    Clinical Results:
    In a clinical study on hair that was bleached 8 times, after 2 uses:

    -Biotech-powered K18PEPTIDE™ restored damaged hair by up to 82%

    Read more

  • Directions for use

  • Ingredients

  • Description
  • Directions for use
  • Ingredients

A leave-in treatment mask for all hair types that clinically reverses damage in four minutes. The K18PEPTIDE™ works to repair damage from bleach, color, chemical services, and heat, restoring strength, softness, smoothness, and bounce to hair.

This mask is powered by the patented K18PEPTIDE™, which is just the right size and molecular structure to reach the innermost layers of hair and re-connect broken keratin chains responsible for hair's strength and elasticity.

Restores strength, softness, smoothness, and bounce
Repairs damaged hair
Easy leave-in formula delivers lasting results

Clinical Results:
In a clinical study on hair that was bleached 8 times, after 2 uses:

-Biotech-powered K18PEPTIDE™ restored damaged hair by up to 82%

Directions for Use:
- In the shower:
-Shampoo, don‘t condition.

Once out of the shower:
-Using a towel gently dry hair until damp.
-Begin with one mL/one dime-size amount of K18 Mask.
-Only add more as needed. Average use is two mL/two dime-size amounts (this is a highly concentrated formula, so you‘ll need much less than traditional masks).
-Work evenly into hair from ends to roots.
-Let sit for four minutes to activate.
-Don‘t rinse out.
-Style as usual after the four minutes is up (fine to add heat protectant or styling product now).
-Use for the first four to six washes, then swap to maintenance mode and use as needed.

Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, sh-Oligopeptide-78 (K18PEPTIDE), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol

Reviews

4.3/5
4,382 reviews
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4.3/5
4,382 reviews
Rating star Rating star Rating star Rating star
  • 5 Rating star
  • 4 Rating star
  • 3 Rating star
  • 2 Rating star
  • 1 Rating star

IrenaDiva

29/01/2025

5/5
User Review without direct purchase

Must have for healthy hair

100000/10 MY HOLY GRAIL if I could recommend a product for your hair it’s this K18 leave in mask. My hair was pretty managed from being Platinum blonde - Brunette . I wanted my hair to feel ALIVE again!! And K18 did the trick! I was a bit hesitant not to put any product after shampooing my hair.. but I’ve followed the instruction and after leaving the mask on for 4 min and blow drying it - it was magical ! My hair felt super soft, healthy, shiny and the ends felt rejuvenated as well. Highly highly recommend

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Recommend this product: Yes

Originally posted on sephora.com

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bauzybee

28/01/2025

5/5
User Review without direct purchase

Must have

I really didn’t want this to work because how expensive it is…. But wow it works insanely good. I have naturally curly hair but have dyed my hair a few times, and just after 6x washes my curls are finally back it’s actually insane how well this works

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Recommend this product: Yes

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lauraeves

27/01/2025

1/5
Verified buyer

Hair fell out

I’m not sure what happened with this product, I have been on a healthy hair journey and growing out my blonde so I decided to try this product to use in place of conditioner(like it says) and within two uses I experienced huge hair loss and and reeling about what this product did to my hair. It felt incredibly dry and frizzy and will never use a product from this line ever again, left me in tears!

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cobwebjr

25/01/2025

5/5
User Review without direct purchase

Tiny but mighty!

There aren’t many items I consider “holy grail” level, but this is definitely one. There seems to be no damage too destructive for this mask to repair—I’ve had my hair dyed, permed, and bleached and after I was done with this mini bottle my hair was back to its normal, silky texture! If you’ve been on the fence about this, run immediately to pick it up!

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Recommend this product: Yes

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JennaB26

25/01/2025

5/5
User Review without direct purchase

Notice a difference

One bottle lasts me 2 months, it’s a game changer for my hair helping it not to break and I don’t use it with any other k18 products. I noticed immediate results which is why I’m not that upset about the price, at least it works!

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Recommend this product: Yes

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jeanamarie777

24/01/2025

1/5
User Review without direct purchase

So dry

So I have fine hair and maybe it’s not meant for fine hair but it always leaves my hair like straw after and it’s extremely hard to saturate throughout your hair since you can’t use conditioner before. It took about an hour to get the product through my entire hair I don’t think it makes any difference besides that either

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hannahmunn

24/01/2025

5/5
User Review without direct purchase

BEST HAIR MASK ON THE MARKET

This product has changed my life. From broken split ends to healthy long hair in just 6 months. You see results as early as just a few weeks. Love love love it. 10/10 recommend

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Recommend this product: Yes

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Captainmortis

23/01/2025

1/5
User Review without direct purchase

Nope

Absolutely not. I’ve tried it multiple times. My hair always feels dry and frizzy after.

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sheljen

22/01/2025

5/5
Verified buyer

Hair health

If I had to pick my single favorite hair product; this is it. Makes my hair look and feel so healthy.

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Recommend this product: Yes

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tararose21

22/01/2025

4/5
User Review without direct purchase

Worth it! Make sure you are using it right though!

Yes it’s expensive but it works! I have long blonde bleached hair and I’ve noticed a difference in 2 uses! I’ve purchased this in the past and noticed no difference and hair was super hard to brush since I wasn’t conditioning as per the instructions.. HOWEVER, I started, clarifying shampoo, then normal shampoo, towel dry hair with microfibre towel, apply this product in sections to your hair. Then I put it in a claw clip for 4 mins then comb it through my hair. Lastly I put conditioner in my hair then rinse! Game changer!

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Recommend this product: Yes

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methok

18/01/2025

5/5
User Review without direct purchase

Love products.. hair mask . Will recommend my friend.

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Recommend this product: Yes

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diana

17/01/2025

5/5
User Review without direct purchase

Wanted to hate it

I have noticed a difference in my hair indeed! The price is crazy but I’ve re brought it so we will see how it goes! I always deep condition afterwards!

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Cocolucy

16/01/2025

5/5
User Review without direct purchase

Game changer. Takes away frizz. It’s as if have done a Brazilian blow out or keratin treatment

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Recommend this product: Yes

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kenv

16/01/2025

5/5
User Review without direct purchase

Love it

You only need 1-3 pumps (depending on hair amount) because emulsifies when you rub it between your palms. Separate your hair into sections and 1 pump per section. Recommesections.

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Recommend this product: Yes

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K18 offers a unique scientific approach to hair care, based on biotechnology. The products' clinically proven effectiveness is based on K18PEPTIDE™ technology, which repairs damage at the molecular level for all hair types (the result of bleaching, chemicals and heat). Born in hair salons, this technology allows you to express your creativity without fear of damage!