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
4,371 reviews
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4.3/5
4,371 reviews
Rating star Rating star Rating star Rating star
  • 5 Rating star
  • 4 Rating star
  • 3 Rating star
  • 2 Rating star
  • 1 Rating star

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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op867

14/01/2025

2/5
User Review without direct purchase

i have heat damaged hair witch in theory should be less extensive damage than those who have bleach damage. but i used a WHOLE mini bottle and saw no results because of how expensive it is i expected to see some type of improvement.i would even say it made my hair more straw like and more easily tangled i do not recommend because of price

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MsFrufru

14/01/2025

5/5
User Review without direct purchase

I am a believer

I have coily natural hair. I bleached my hair 2x in one day. My curls were limp and stringy even after using protein treatments and deep conditioning. I used the k18 clarifying shampoo, mask and oil. My curls are once again popping and my hair is super soft. I was worried I had damaged my hair permanently. k18 was a pleasant surprise and well worth every dollar spent.

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Recommend this product: Yes

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laneaislynn

12/01/2025

1/5
User Review without direct purchase

Not for Me

Didn’t do anything for my hair.. used after washing & towel drying hair and blow dried. Hair turned out more frizzy, dull, and tangled than usual. Won’t be using again!

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goddess77

11/01/2025

1/5
Verified buyer

Not Worth for the Price

I have been using the product for at least 3 weeks and I do not see a permanent difference. It is nice when I put it on, like it would a lot of other leave on hair product, just for that one time, but the effect does not last. It is not like it is repairing my hair, and for the price, it is absolutely not worth it!

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keeks0926

11/01/2025

5/5
Testers' review

I got a free sample of this with a purchase a while ago and decided to try it. I've used the sample twice now and the results are amazing! For reference I have 3c/4a curl pattern, and I wash about once a week. After applying this time, I straightened my hair, and noticed a difference immediately. I paired this with my redkin ABC leave in for the heat protectant properties and my hair is silky soft. Will be purchasing a full size soon.

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Recommend this product: Yes

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itsbribri

10/01/2025

4/5
User Review without direct purchase

Hair feels so soft

I have been using this hair mask for a few weeks and my hair has never felt softer! The bottle is VERY small for the price point but I will say I do see huge improvement in how my hair feels so maybe it is worth the price.

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Recommend this product: Yes

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stephlaj96

10/01/2025

5/5
User Review without direct purchase

My hair instantly feels soft and silky after putting this into wet hair, and it doesn’t look or feel greasy once dried. I originally got this to prevent brassy hair after I went blonde, now I use it once a week to treat my hair and I’ll forever be doing this.

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Recommend this product: Yes

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asiadawn

09/01/2025

5/5
User Review without direct purchase

This product delivers on its promises! My fine, dry, bleached hair is looking shinier, smoother and healthier than ever.

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Recommend this product: Yes

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AlisonGriff

08/01/2025

5/5
Verified buyer

Absolutely incredible and stunning results

This stuff is nothing short of incredible. I have super long hair that has been bleached several times, and it was frizzy and constantly getting tangled. The first time I used this, it gave my hair glass shine and it was softer than it's ever been. I'm now on the third consecutive wash (they recommend 6 in the beginning) and am genuinely shocked at the results. My hair is silky soft, no more dry frizzy ends, and my wave pattern has been restored. I know the price is steep but I used to have one-time molecular mending treatments at the salon for more and the results weren't nearly as stunning. If this is in your budget, get it, it is MAGIC.

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Recommend this product: Yes

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RenaLeft

07/01/2025

5/5
User Review without direct purchase

Can’t go without it

After using it on my bleached and dyed hair, it’s made it so much healthier

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Recommend this product: Yes

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sparklejumprop3

07/01/2025

5/5
User Review without direct purchase

Must-have for bleached hair!

This made my hair look and feel so much better after all the damage it’s been through! It was so dry and scratchy, and was visible to others not just me. Now I get compliments on what healthy bleached hair I have!

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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!