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K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml
K18 Leave-In Molecular Repair Hair Mask 50 ml

K18 Leave-In Molecular Repair Hair Mask 50 ml

$79.00

(21,986 reviews)

K18 Molecular Repair Mask is a repairing leave-in hair mask that transforms even extremely damaged hair into resilient and healthy hair. The damage can be caused by bleaching, perming, hair dyeing, other chemical treatment or heat styling. K18 Molecular Repair Mask contains a groundbreaking molecule, namely K18Peptide. This patented peptide repairs the hair from the inside out by rebuilding damaged hair and preventing future damage, frizz and split ends. In addition, it is clinically proven that the formula recovers 91% of the hair's own strength and 94% of the hair's elasticity. K18 Molecular Repair Mask consists of a delicious, light texture that feels weightless in the hair, without appearing heavy or greasy. Simply let the hair mask work for four mint teats in freshly washed, towel-dried hair, and say hello to a nourished and super soft result. Recreate smooth, strong and healthy hair with this professional hair care product that will become an indispensable product in your hair care routine! NOTE: As this is a leave-in product, it should NOT be rinsed out of the hair. Therefore, do not use conditioner in conjunction with this product.

K18 Molecular Repair Mask is a repairing leave-in hair mask that transforms even extremely damaged hair into resilient and healthy hair. The damage can be caused by bleaching, perming, hair dyeing, other chemical treatment or heat styling. K18 Molecular Repair Mask contains a groundbreaking molecule, namely K18Peptide. This patented peptide repairs the hair from the inside out by rebuilding damaged hair and preventing future damage, frizz and split ends. In addition, it is clinically proven that the formula recovers 91% of the hair's own strength and 94% of the hair's elasticity. K18 Molecular Repair Mask consists of a delicious, light texture that feels weightless in the hair, without appearing heavy or greasy. Simply let the hair mask work for four mint teats in freshly washed, towel-dried hair, and say hello to a nourished and super soft result. Recreate smooth, strong and healthy hair with this professional hair care product that will become an indispensable product in your hair care routine! NOTE: As this is a leave-in product, it should NOT be rinsed out of the hair. Therefore, do not use conditioner in conjunction with this product.

K18 Leave-In Molecular Repair Hair Mask 50 ml

(21,986 reviews)

K18 Molecular Repair Mask is a repairing leave-in hair mask that transforms even extremely damaged hair into resilient and healthy hair. The damage can be caused by bleaching, perming, hair dyeing, other chemical treatment or heat styling. K18 Molecular Repair Mask contains a groundbreaking molecule, namely K18Peptide. This patented peptide repairs the hair from the inside out by rebuilding damaged hair and preventing future damage, frizz and split ends. In addition, it is clinically proven that the formula recovers 91% of the hair's own strength and 94% of the hair's elasticity. K18 Molecular Repair Mask consists of a delicious, light texture that feels weightless in the hair, without appearing heavy or greasy. Simply let the hair mask work for four mint teats in freshly washed, towel-dried hair, and say hello to a nourished and super soft result. Recreate smooth, strong and healthy hair with this professional hair care product that will become an indispensable product in your hair care routine! NOTE: As this is a leave-in product, it should NOT be rinsed out of the hair. Therefore, do not use conditioner in conjunction with this product.

K18 Molecular Repair Mask is a repairing leave-in hair mask that transforms even extremely damaged hair into resilient and healthy hair. The damage can be caused by bleaching, perming, hair dyeing, other chemical treatment or heat styling. K18 Molecular Repair Mask contains a groundbreaking molecule, namely K18Peptide. This patented peptide repairs the hair from the inside out by rebuilding damaged hair and preventing future damage, frizz and split ends. In addition, it is clinically proven that the formula recovers 91% of the hair's own strength and 94% of the hair's elasticity. K18 Molecular Repair Mask consists of a delicious, light texture that feels weightless in the hair, without appearing heavy or greasy. Simply let the hair mask work for four mint teats in freshly washed, towel-dried hair, and say hello to a nourished and super soft result. Recreate smooth, strong and healthy hair with this professional hair care product that will become an indispensable product in your hair care routine! NOTE: As this is a leave-in product, it should NOT be rinsed out of the hair. Therefore, do not use conditioner in conjunction with this product.

$79.00 - $125.52

in 31 offers

The lowest price for K18 Leave-In Molecular Repair Hair Mask 50 ml right now is $79.00 at OnTrendBeauty, compared across 26 retailers.

The all-time low was $12.30 on 3 June 2026 — today's price is 542% above the lowest ever. It has been notably cheaper before — worth setting a price alert.

Prices last updated 9 June 2026.

Size:

0.5 oz
5 ml
1.7 oz
15 ml
150 ml

Price comparison

Price data powered by pricesAPI.io

Last updated at 09/06/2026 21:27:09

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
OnTrendBeauty

$79.00

K18 Professional Leave-In Molecular Repair Hair Mask 50mL

Delivery between 16–24 June $8.95

Lila Beauty

$89.95

Buy K18 Leave-In Molecular Repair Hair Mask 50ml in Australia - Skincare and Hair Care

Free delivery between 11–18 June

ssshair.com.au

$91.96

K18 Leave-In Molecular Repair Mask 50ml

Delivery between 11–17 June $9.95

everythinghairandbeauty.com.au

$93.80

K18 Molecular Repair Hair Mask 50ml

Delivery between Thu – Sat $12.95

Hue Artisans of Hair

$94.50

K18 50ml — HueArtisansofHair

BIG W

$94.95

K18 Molecular Repair Hair Mask 50ml

Delivery $7.99

BIG W

$104.26

K18 Leave-In Molecular Repair Hair Mask 50ml/1.7oz - Size 50ml/1.7oz

Delivery $9.95

BIG W

$105.00

K18 Leave-In Molecular Repair Hair Mask 50ml

Delivery $14.95

BIG W

$125.52

K18 Leave-In Molecular Repair Hair Mask 50ml/1.7oz

Delivery $8.90

Woolworths

$94.95

K18 Molecular Repair Hair Mask 50ml

Delivery between 12–24 June $10

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

15 May 2022lara.t

originally posted on influenster.com

I recently had highlights added to my very thin, fine, blonde hair. I must say that this 4 Minute MIRACLE has totally changed the texture of my hair.▫️ I've tried many hair treatments and Masks, but I've never received such EXTREME benefits from 2 pumps of a product! ▫️This worked so much better than Olaplex ever has, and it has totally blown me away with what I was capable of achieving home. ▫️As they say, K18 is the FIRST brand to use biomimetics to reconform broken keratin chains and regenerate disulfide bonds that are broken when getting chemical treatments, thermal styling or your everyday environmental aggressors! 👱‍♀️My Experience: ▫️I would wash my hair and towel dry. I used 2 pumps of K18, and I did not wash it out, as instructed. ▫️However, I also ... MoreI recently had highlights added to my very thin, fine, blonde hair. I must say that this 4 Minute MIRACLE has totally changed the texture of my hair.▫️ I've tried many hair treatments and Masks, but I've never received such EXTREME benefits from 2 pumps of a product! ▫️This worked so much better than Olaplex ever has, and it has totally blown me away with what I was capable of achieving home. ▫️As they say, K18 is the FIRST brand to use biomimetics to reconform broken keratin chains and regenerate disulfide bonds that are broken when getting chemical treatments, thermal styling or your everyday environmental aggressors! 👱‍♀️My Experience: ▫️I would wash my hair and towel dry. I used 2 pumps of K18, and I did not wash it out, as instructed. ▫️However, I also researched and found that after the 4 minutes you can jump back in the shower and use conditioner if you find that your hair is tangly. ▫️After those quick 4 minutes K18 had become fully activated, leaving your hair SILKY SMOOTH. ▫️It absolutely sealed my cuticles, mended my split ends, and it has made my hair shine and bounce like it never has before!▫️I used the product for 4 shampoos consecutively, and then I took a break to use my normal shampoo and conditioner. ▫️I then started up again 4 shampoos later. By this time period my hair now, daily, feels like I just left the salon! It has reversed chemical, heat, color and bleach damage from my normal salon visits! ▫️This is the most EFFECTIVE Leave In Hair Mask that I have ever had the pleasure to use, and I will continue recommending it to everyone!

Amazing product if used properly :)
16 January 2023egglam

originally posted on sephora.com

Licensed hair dresser here. After reading some of the bad reviews I thought I should jump in to explain some things.This is a repair mask that you leave in. But this is not the same as a normal leave in conditioner. Once you apply this to your hair (do not exceed the amount instructed) and the 4 minutes have passed you need to follow up with your regular leave in products. This is not a heat protector nor meant to be your styling product.You should only use this consecutively for 4-6 washes depending on the condition of your hair. If you use this too much you will be adding too much protein to your hair and it will feel like straw (the over use of the olaplex mask can also do this to your hair). Once you’ve surpassed 4-6 washes, this should only be used for ... MoreLicensed hair dresser here. After reading some of the bad reviews I thought I should jump in to explain some things.This is a repair mask that you leave in. But this is not the same as a normal leave in conditioner. Once you apply this to your hair (do not exceed the amount instructed) and the 4 minutes have passed you need to follow up with your regular leave in products. This is not a heat protector nor meant to be your styling product.You should only use this consecutively for 4-6 washes depending on the condition of your hair. If you use this too much you will be adding too much protein to your hair and it will feel like straw (the over use of the olaplex mask can also do this to your hair). Once you’ve surpassed 4-6 washes, this should only be used for maintenance. So use this maybe once a week or even once every two weeks.If your hair feels dry and brittle and you’re not using any products in your hair to add hydration and moisture, it is normal for your hair to feel that way. Most products that are meant to repair the hair are meant to strengthen, not hydrate or moisturize. After reading the ingredients, I do not see any hydrating or really moisturizing agents listed. (Olaplex alone is the same which is why you have to buy the entire line in order for it to work properly)This product works. I use this on my baby fine, dry, curly hair. I do not wear my hair curly. I blowdry and style after every wash. I have noticed a big difference after using this treatment. But this treatment alone is not going to work miracles. There is no repairing conditioning mask on the market that is able to do that.This brand has a whole education section on their website if anyone feels confused about what this mask is supposed to do because the description on here is very vague and does not paint the whole picture.I hope this information helps!

Broke a section of my hair off.
22 July 2022babygirI

originally posted on sephora.com

I literally only bought this because of a tiktok video i saw 2 months ago. Before that, i never even heard of or seen this brand before. My hair is platinum blonde, and i’ve been platinum blonde for about 3 years straight now. I’ve used olaplex since i first went platinum, and have had issues with the product only when bought from amazon. It would make my hair feel frizzy and dry. When i bought it from sephora or straight from their website it would make my hair feel amazing when used in moderation. I began to only use it 2 times a month at most so that i wasn’t stressing my hair with the strong ingredients. My hair is around mid waist length and is on the finer side for reference. 2 days after using k18, i was happy and thought it was working wonders for my hair. i ... MoreI literally only bought this because of a tiktok video i saw 2 months ago. Before that, i never even heard of or seen this brand before. My hair is platinum blonde, and i’ve been platinum blonde for about 3 years straight now. I’ve used olaplex since i first went platinum, and have had issues with the product only when bought from amazon. It would make my hair feel frizzy and dry. When i bought it from sephora or straight from their website it would make my hair feel amazing when used in moderation. I began to only use it 2 times a month at most so that i wasn’t stressing my hair with the strong ingredients. My hair is around mid waist length and is on the finer side for reference. 2 days after using k18, i was happy and thought it was working wonders for my hair. i thought it was a step up from olaplex like i’ve seen some others say. I loved the smell and i felt like it made the flyaways less apparent. The first 1-2 uses made my hair feel more soft as well. It started to feel a little drying by the third use. After showering a couple days later after the third use, i put my 4th application in. I was drying my hair infront of a fan gently combing my fingers throughout my hair. I noticed my hair felt like it was drying slower than usual, and it felt a bit more tangled/rough than usual? I then felt a noticeable chunk of hair in the back of my head that seemed more damaged than the rest of my hair. I dragged my hand down from the root of my head to the bottom of that section, where i had discovered that it broke off multiple inches down from my root. I never have noticed that prior to starting the k18 treatment. I’m pretty sure i would have noticed that level of breakage if i had it prior to using k18.. This is the first time since going platinum that i’ve ever gotten significant breakage, especially in one area. I highly do not recommend this product for girls with bleached hair (especially fine hair), since i’m almost certain it’s what broke my hair off.

Specification

ChoicesCruelty Free
ChoicesSulphate Free
ChoicesVegan
ChoicesParaben Free
Hair TextureFine

Price comparison

Updated about 18 hours ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
OnTrendBeauty

$79.00

K18 Professional Leave-In Molecular Repair Hair Mask 50mL

Delivery between 16–24 June $8.95

Lila Beauty

$89.95

Buy K18 Leave-In Molecular Repair Hair Mask 50ml in Australia - Skincare and Hair Care

Free delivery between 11–18 June

ssshair.com.au

$91.96

K18 Leave-In Molecular Repair Mask 50ml

Delivery between 11–17 June $9.95

everythinghairandbeauty.com.au

$93.80

K18 Molecular Repair Hair Mask 50ml

Delivery between Thu – Sat $12.95

Hue Artisans of Hair

$94.50

K18 50ml — HueArtisansofHair

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

15 May 2022

I recently had highlights added to my very thin, fine, blonde hair. I must say that this 4 Minute MIRACLE has totally changed the texture of my hair.▫️ I've tried many hair treatments and Masks, but I've never received such EXTREME benefits from 2 pumps of a product! ▫️This worked so much better than Olaplex ever has, and it has totally blown me away with what I was capable of achieving home. ▫️As they say, K18 is the FIRST brand to use biomimetics to reconform broken keratin chains and regenerate disulfide bonds that are broken when getting chemical treatments, thermal styling or your everyday environmental aggressors! 👱‍♀️My Experience: ▫️I would wash my hair and towel dry. I used 2 pumps of K18, and I did not wash it out, as instructed. ▫️However, I also ... MoreI recently had highlights added to my very thin, fine, blonde hair. I must say that this 4 Minute MIRACLE has totally changed the texture of my hair.▫️ I've tried many hair treatments and Masks, but I've never received such EXTREME benefits from 2 pumps of a product! ▫️This worked so much better than Olaplex ever has, and it has totally blown me away with what I was capable of achieving home. ▫️As they say, K18 is the FIRST brand to use biomimetics to reconform broken keratin chains and regenerate disulfide bonds that are broken when getting chemical treatments, thermal styling or your everyday environmental aggressors! 👱‍♀️My Experience: ▫️I would wash my hair and towel dry. I used 2 pumps of K18, and I did not wash it out, as instructed. ▫️However, I also researched and found that after the 4 minutes you can jump back in the shower and use conditioner if you find that your hair is tangly. ▫️After those quick 4 minutes K18 had become fully activated, leaving your hair SILKY SMOOTH. ▫️It absolutely sealed my cuticles, mended my split ends, and it has made my hair shine and bounce like it never has before!▫️I used the product for 4 shampoos consecutively, and then I took a break to use my normal shampoo and conditioner. ▫️I then started up again 4 shampoos later. By this time period my hair now, daily, feels like I just left the salon! It has reversed chemical, heat, color and bleach damage from my normal salon visits! ▫️This is the most EFFECTIVE Leave In Hair Mask that I have ever had the pleasure to use, and I will continue recommending it to everyone!

lara.t originally posted on influenster.com
Amazing product if used properly :)
16 January 2023

Licensed hair dresser here. After reading some of the bad reviews I thought I should jump in to explain some things.This is a repair mask that you leave in. But this is not the same as a normal leave in conditioner. Once you apply this to your hair (do not exceed the amount instructed) and the 4 minutes have passed you need to follow up with your regular leave in products. This is not a heat protector nor meant to be your styling product.You should only use this consecutively for 4-6 washes depending on the condition of your hair. If you use this too much you will be adding too much protein to your hair and it will feel like straw (the over use of the olaplex mask can also do this to your hair). Once you’ve surpassed 4-6 washes, this should only be used for ... MoreLicensed hair dresser here. After reading some of the bad reviews I thought I should jump in to explain some things.This is a repair mask that you leave in. But this is not the same as a normal leave in conditioner. Once you apply this to your hair (do not exceed the amount instructed) and the 4 minutes have passed you need to follow up with your regular leave in products. This is not a heat protector nor meant to be your styling product.You should only use this consecutively for 4-6 washes depending on the condition of your hair. If you use this too much you will be adding too much protein to your hair and it will feel like straw (the over use of the olaplex mask can also do this to your hair). Once you’ve surpassed 4-6 washes, this should only be used for maintenance. So use this maybe once a week or even once every two weeks.If your hair feels dry and brittle and you’re not using any products in your hair to add hydration and moisture, it is normal for your hair to feel that way. Most products that are meant to repair the hair are meant to strengthen, not hydrate or moisturize. After reading the ingredients, I do not see any hydrating or really moisturizing agents listed. (Olaplex alone is the same which is why you have to buy the entire line in order for it to work properly)This product works. I use this on my baby fine, dry, curly hair. I do not wear my hair curly. I blowdry and style after every wash. I have noticed a big difference after using this treatment. But this treatment alone is not going to work miracles. There is no repairing conditioning mask on the market that is able to do that.This brand has a whole education section on their website if anyone feels confused about what this mask is supposed to do because the description on here is very vague and does not paint the whole picture.I hope this information helps!

egglam originally posted on sephora.com
Broke a section of my hair off.
22 July 2022

I literally only bought this because of a tiktok video i saw 2 months ago. Before that, i never even heard of or seen this brand before. My hair is platinum blonde, and i’ve been platinum blonde for about 3 years straight now. I’ve used olaplex since i first went platinum, and have had issues with the product only when bought from amazon. It would make my hair feel frizzy and dry. When i bought it from sephora or straight from their website it would make my hair feel amazing when used in moderation. I began to only use it 2 times a month at most so that i wasn’t stressing my hair with the strong ingredients. My hair is around mid waist length and is on the finer side for reference. 2 days after using k18, i was happy and thought it was working wonders for my hair. i ... MoreI literally only bought this because of a tiktok video i saw 2 months ago. Before that, i never even heard of or seen this brand before. My hair is platinum blonde, and i’ve been platinum blonde for about 3 years straight now. I’ve used olaplex since i first went platinum, and have had issues with the product only when bought from amazon. It would make my hair feel frizzy and dry. When i bought it from sephora or straight from their website it would make my hair feel amazing when used in moderation. I began to only use it 2 times a month at most so that i wasn’t stressing my hair with the strong ingredients. My hair is around mid waist length and is on the finer side for reference. 2 days after using k18, i was happy and thought it was working wonders for my hair. i thought it was a step up from olaplex like i’ve seen some others say. I loved the smell and i felt like it made the flyaways less apparent. The first 1-2 uses made my hair feel more soft as well. It started to feel a little drying by the third use. After showering a couple days later after the third use, i put my 4th application in. I was drying my hair infront of a fan gently combing my fingers throughout my hair. I noticed my hair felt like it was drying slower than usual, and it felt a bit more tangled/rough than usual? I then felt a noticeable chunk of hair in the back of my head that seemed more damaged than the rest of my hair. I dragged my hand down from the root of my head to the bottom of that section, where i had discovered that it broke off multiple inches down from my root. I never have noticed that prior to starting the k18 treatment. I’m pretty sure i would have noticed that level of breakage if i had it prior to using k18.. This is the first time since going platinum that i’ve ever gotten significant breakage, especially in one area. I highly do not recommend this product for girls with bleached hair (especially fine hair), since i’m almost certain it’s what broke my hair off.

babygirI originally posted on sephora.com
Don’t Read; Just Buy It!
13 May 2022

Fun fact: My first round of highlights were courtesy of my cousin after she completed cosmetology school in, yikes, 1985 (I think. After all, it was the 80s.) For the better part better part of 30+ years, I’ve been doing some serious damage, so getting a chance to use K18’s Leave-in Molecular Repair Hair Mask was a no brainer.❤️Repairs Your Hair: That’s one whale of claim, and K18 sets out to heal the hair both externally and internally. Instead of treating the cuticle (like regular conditioner) and the cortex (like bond builders) K18 goes to work on the cortical cells. Science-y lingo aside, I hear “repair,” “heal,” and “inside.” That’s new to me.❤️Results on Day One: I followed all the rules: freshly shampooed hair without using traditional conditioner. I used ... MoreFun fact: My first round of highlights were courtesy of my cousin after she completed cosmetology school in, yikes, 1985 (I think. After all, it was the 80s.) For the better part better part of 30+ years, I’ve been doing some serious damage, so getting a chance to use K18’s Leave-in Molecular Repair Hair Mask was a no brainer.❤️Repairs Your Hair: That’s one whale of claim, and K18 sets out to heal the hair both externally and internally. Instead of treating the cuticle (like regular conditioner) and the cortex (like bond builders) K18 goes to work on the cortical cells. Science-y lingo aside, I hear “repair,” “heal,” and “inside.” That’s new to me.❤️Results on Day One: I followed all the rules: freshly shampooed hair without using traditional conditioner. I used two pumps and coated my damp strands then waited about five minutes before combing out my hair. After blow drying, my hair was the softest it has been in years. It also felt sleek as if I had flat-ironed it.❤️Consistent Results When Used With Various Shampoos: Out of curiosity, I rotated my shampoos to see how K18 worked with each one. Whether it was a salon or celebrity brand, everyday, clarifying or moisturizing formula, the K18 consistently left my hair soft and silky. The hair texture was the biggest tell. My hair is very fine, but I have to flat iron it to get it completely straight. Not on my K18 days, though. The hair laid smoother and straighter with a simple blow dry session, which shortened my routine and helped me avoid further damage due to heat styling.❤️The Bottom Line: If you bleach, color, or use hot styling tools, K18 will improve your hair’s condition long-term. It’s not a quick fix; it’s a hair health booster. Bonus: It also softens the coarse gray hairs I obviously have. They may be hidden among the highlights, but their texture pre-K18 tells me I’m more gray than I realize … but I ain’t worrying about it with this in my routine.Perfect in every way!

fwetracy originally posted on sephora.com
Double duty care for your hair
30 January 2023

After hearing so much buzz about this hair mask, I was skeptical about the results. My experience with many beauty products has resulted in an inverse relationship between expectations and performance. To put this one to the test, I needed to follow the instructions to the T.After using the K18 Peptide Detox Shampoo, I partially towel-dried my hair, then applied a small amount, a little over a teaspoon, to the middle and ends. After exactly four minutes, I added my styling products and began the blow-drying process. What immediately stuck out was how my hair felt coated, but not heavy. I feared the results would be stringy, clumped together strands, and that I would soon be re-washing my hair. But what happened was the opposite. The mask gave my hair a certain ... MoreAfter hearing so much buzz about this hair mask, I was skeptical about the results. My experience with many beauty products has resulted in an inverse relationship between expectations and performance. To put this one to the test, I needed to follow the instructions to the T.After using the K18 Peptide Detox Shampoo, I partially towel-dried my hair, then applied a small amount, a little over a teaspoon, to the middle and ends. After exactly four minutes, I added my styling products and began the blow-drying process. What immediately stuck out was how my hair felt coated, but not heavy. I feared the results would be stringy, clumped together strands, and that I would soon be re-washing my hair. But what happened was the opposite. The mask gave my hair a certain weight, without weighing it down. It helped to smooth, without appearing oily. Still, the next couple of days would be telling; would I wake up to a greasy mess?Surprisingly, no - even after a couple of days, my hair retained its appearance without the aid of dry shampoo or other products. After the initial period of using after every shampoo, I now incorporate it once a week to maintain my hair health. What I love most about this is that it works double duty; it nourishes and aids in styling. For someone with thin, fine hair, that is a rare and treasured combination, earning it high marks and my recommendation.

eshoe originally posted on sephora.com
For the people that only used it one time, so far so good!
6 April 2022

So, let me start off by saying it was this, or olaplex for the 30ish dollars I was going to spend on my hair- as I didn't want to invest a huge amount of money into another product with fancy claims and next to zero results. I was intrigued by how DEEP k18 is meant to go into my hair, I haven't seen any product even claim anything close to litteraly rebuilding your hair down "to the DNA" of a strand. USEAGE: I have only used it one time, so I will give my first experience with the product. I was starting with thick, bleached wavy/curly/coily hair - as my hair is wavy up top, turning into curls, then coils near the bottom. I followed the instructions about only shampooing 1st, though my hair had already been stripped and I do not own a clarifying shampoo but still ... MoreSo, let me start off by saying it was this, or olaplex for the 30ish dollars I was going to spend on my hair- as I didn't want to invest a huge amount of money into another product with fancy claims and next to zero results. I was intrigued by how DEEP k18 is meant to go into my hair, I haven't seen any product even claim anything close to litteraly rebuilding your hair down "to the DNA" of a strand. USEAGE: I have only used it one time, so I will give my first experience with the product. I was starting with thick, bleached wavy/curly/coily hair - as my hair is wavy up top, turning into curls, then coils near the bottom. I followed the instructions about only shampooing 1st, though my hair had already been stripped and I do not own a clarifying shampoo but still worked out, it felt like straw but I was able to put it in. After 4 minutes I really did see a 50% improvement! I did end up putting some leave in conditioner after the 4 minutes were complete to help. I understand this is a progressive treatment so I didn't have too much of my hopes up, as past the first usage I had been to a Waterpark and soaking in chlorinated water for 2 days. However, that being said my hair surprisingly did not break (just got pretty dry understandably) despite how much damage that had come onto it a week after the treatment. I will be using this after my upcoming hair appointment to really test the long term affects. Another note is that using styling tools may help show off the effects easier - I have not been using heat tools or even any brushing when my hair is drying due to the curly girl method. So far it's looking good - my only concern is will this bring an abundance of softness to my demanding curls, or just bring me back to my normal struggles? We shall see, but I have high hopes based on my 1st results. ITS WORTH A TRY CURLY GIRLS!

Santa B. M. originally posted on k18hair.com
So grateful for this product
4 July 2022

I won’t get into some sap story about my health but I’ve been struggling w/ my hair loss for YEARS. I switched shampoos, bought the most expensive shampoos & masks, shampooing more, shampooing less, washing my hair w/ distilled water only, I stopped using any heat, I bought silk pillow cases, special elastics that are gentle on hair, only gently comb w/ a wide tooth comb, scalp massages, I already didn’t color my hair, I tried…just everything. Then decided to chop it all off & start clean but I couldn’t seem to grow my hair out, as soon as I got a little length the ends would be so thin, stringy, & dry & just look terrible!! So I would cut it again & be mad at myself, feeling as though I was clearly doing something wrong. Until one day I realized, my hair wasn’t ... MoreI won’t get into some sap story about my health but I’ve been struggling w/ my hair loss for YEARS. I switched shampoos, bought the most expensive shampoos & masks, shampooing more, shampooing less, washing my hair w/ distilled water only, I stopped using any heat, I bought silk pillow cases, special elastics that are gentle on hair, only gently comb w/ a wide tooth comb, scalp massages, I already didn’t color my hair, I tried…just everything. Then decided to chop it all off & start clean but I couldn’t seem to grow my hair out, as soon as I got a little length the ends would be so thin, stringy, & dry & just look terrible!! So I would cut it again & be mad at myself, feeling as though I was clearly doing something wrong. Until one day I realized, my hair wasn’t just falling out… it was also breaking off 🤦🏻‍♀️ Suddenly it all made sense, why the ends always looked like I had dipped them in lightener & then flat ironed them wet. BUT WHY?? I thought, maybe it’s because I have such fine hair, and it’s naturally curly, making it more susceptible to breakage? Is it stress? Is it hormones? I didn’t know but I ordered k18 as it seemed from the description to be the only product that could strengthen my hair from the inside, which is exactly what I needed. I’m so glad I took the plunge because it absolutely worked. Yes, my hair is still thinking, but my ends are all the same thickness… something I haven’t been able to say about my hair for the past 10 plus years!! I was & still am so impressed & thankful for this product & this company!! As to the “why” of it all, it turns out, my body does not do gluten. So on top of that causing major inflammation in my body, I was also unable to absorb nutrients properly w/ tests showing vitamin D & iron deficiencies. Soooo now I know why my hair was growing in thinner & weaker, & I have the power to finally correct the problem. In the meantime, I still plan on using k18 indefinitely. It’s amazing how much it has helped my hair & confidence. If you made it to the end of this lengthy review, I applaud you, I also hope this will resonate w/ others that may be experiencing similar situations & feeling like you should just shave it all off & invest in a wig… try the k18 first.

Jasmine J. originally posted on k18hair.com
The hype is real
11 April 2022

The tldr version: follow the instructions and it’s the type of science that seems like magic. Typically I don’t write reviews but there were so many incentivized ones and it’s pretty pricey so thought I’d throw my two cents in here. For context/comparison I use olaplex, the whole system when I feel inspired and just the #3 and #8 when I’m feeling lazy (which admittedly is more often than not) and at $28/bottle per bottle it may technically be cheaper but it’s a multiple bottle system so it gets pretty comparable in price fast. I’ve used this twice and the first time I used a clarifying shampoo, no conditioner, and then went in with towel dried/ damp hair with about a pump and a half (mid-back length, fine, not very thick, bleached hair). I was a bit worried my hair ... MoreThe tldr version: follow the instructions and it’s the type of science that seems like magic. Typically I don’t write reviews but there were so many incentivized ones and it’s pretty pricey so thought I’d throw my two cents in here. For context/comparison I use olaplex, the whole system when I feel inspired and just the #3 and #8 when I’m feeling lazy (which admittedly is more often than not) and at $28/bottle per bottle it may technically be cheaper but it’s a multiple bottle system so it gets pretty comparable in price fast. I’ve used this twice and the first time I used a clarifying shampoo, no conditioner, and then went in with towel dried/ damp hair with about a pump and a half (mid-back length, fine, not very thick, bleached hair). I was a bit worried my hair seemed maybe a bit dry, crunchy? So after the “4 minutes to activate” I added some of my normal hair serum and it felt mostly normal. Air dried, brushed and it looked like how I Wished my hair would air dry (you know, blow dried smooth but still with a bit of body but not like it was blown out). I slept on it and it still looked as good as it did when I went to sleep. Fast forward to second wash, everything the same, but my hair felt better (likely bc it’s more repaired), so didn’t add anything extra this time. My not-trimmed-in-year hair now looks darn near like I had a fresh trim a month ago. It’s admittedly weird to not condition and I would love if the K18 had a bit more slip, so definitely pre-brush your hair before shampooing and try not to tangle too much in the drying process, I use a hair towel which helps a lot. This is honestly so easy to use, takes so much less time than traditional hair masks, and has such visible results, I will definitely buy again.

BriIntheDMV originally posted on sephora.com
Worth all the hype and then some
6 August 2022

This product is a real life superhero. Truly life changing. A few months ago i had the brilliant idea of chopping my waist length natural hair to my shoulders and even attempted to give myself bangs… Instant regret. I was in desperate need of a solution to cure my ugliness so i decided to get some highlights. Well “some” highlights translates to “please bleach my entire head” to some newbie stylists. Three salon visits later my hair was definitely feeling the wrath. But it doesn’t end there. I was still desperately trying to find a way to tolerate this newfound synthetic wanna be barbie look when i pulled out my flat iron from middle school that i hadn’t touched in years. Went for the part that concerned me the most, the “bangs” that my 2c hair did not agree with. ... MoreThis product is a real life superhero. Truly life changing. A few months ago i had the brilliant idea of chopping my waist length natural hair to my shoulders and even attempted to give myself bangs… Instant regret. I was in desperate need of a solution to cure my ugliness so i decided to get some highlights. Well “some” highlights translates to “please bleach my entire head” to some newbie stylists. Three salon visits later my hair was definitely feeling the wrath. But it doesn’t end there. I was still desperately trying to find a way to tolerate this newfound synthetic wanna be barbie look when i pulled out my flat iron from middle school that i hadn’t touched in years. Went for the part that concerned me the most, the “bangs” that my 2c hair did not agree with. Well, it was already too late when i heard the sizzle and saw the smoke radiate as i ran the flat iron over the thinnest most fragile section of my hair. Turns out i had it set at 450° :) What was once ugly became intolerably hideous. The were linked frizzled beyond belief it was horrendous and of course right in front and center, no hiding that one. I tried hair mask after hair mask, argon oil and those alike, serums and creams and anything else targeted to repair with no luck. ENTER K18. Ahhhh god bless the creators of this revolutionary product. In just one use my frizzled burnt crispy strands were reborn. They were soft silky blended seamlessly with the rest of my now healed hair. This product is legit and all it’s cracked up to be. As long as you follow the directions, you will not be disappointed. Worth every penny. I suggest using a clarifying shampoo prior to rid your hair of any buildup that could interfere with the efficacy. Also, make sure you are applying evenly to your whole head because i was concentrating on the front and the one time i let my hair air dry the difference in the condition of the front of my hair vs the back was so noticeable it was insane. Overall so pleased with this product, just wish it was more affordable as i really could afford it the first time around

Maggie originally posted on beautybay.com
Wow!
10 June 2022

Please read my review! This product is the Holy Grail. Anybody who writes a review saying otherwise, simply isn't using it correctly. The first step when using this product is to shampoo your hair, and skip the conditioner. Sounds crazy right? Well, in order for this product to penetrate the hair you need to use a silicone free shampoo. I repeat, use a silicone free shampoo! A lot of clarifying shampoo still have silicone in it.... Just shop around and find a silicone free one. You're better off using dish soap rather than a shampoo that has silicone in it, because then you're just wasting your money on this product if you aren't going to strip your hair before using it. Your hair will be a tangled mess, especially if you have baby fine hair like me. But this ... MorePlease read my review! This product is the Holy Grail. Anybody who writes a review saying otherwise, simply isn't using it correctly. The first step when using this product is to shampoo your hair, and skip the conditioner. Sounds crazy right? Well, in order for this product to penetrate the hair you need to use a silicone free shampoo. I repeat, use a silicone free shampoo! A lot of clarifying shampoo still have silicone in it.... Just shop around and find a silicone free one. You're better off using dish soap rather than a shampoo that has silicone in it, because then you're just wasting your money on this product if you aren't going to strip your hair before using it. Your hair will be a tangled mess, especially if you have baby fine hair like me. But this product will work and you'll eventually be able to detabgle your hair after a few minutes! After you shampoo and towel dry your hair... Just leave it a tiny bit damp... When you use a pump or two of this product, rub it together in the palms of your hands and it turns into a very watery consistency. Start working it into your strands starting at the ends, then working your way up. You will instantly feel your hair get softer, and should be able to detangle it after a few minutes. The important thing during this part is to let the product sit in your hair for a full four minutes before adding any additional hair product. You just let it sit in your hair and basically soak into the hair. I have been using olaplex ever since it came out, I have tried every Bond Building Products including Redken, Bumble and Bumble, Brazilian Bond Builder, Etc. This product is different. If you use a shampoo first with silicone, emulsifying wax, Polyquaternium, or any type of silicone at all then you probably will not see results with K18. The most important thing is to use a shampoo that isn't going to leave any residue or coating on your hair whatsoever, so that the K18 can always penetrate your hair strands.

jmoolah19 originally posted on sephora.com

Specification

ChoicesCruelty Free
ChoicesSulphate Free
ChoicesVegan
ChoicesParaben Free
Hair TextureFine

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