A leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes*. The K18PEPTIDE™ is clinically proven to repair damage from bleach + color, chemical services and heat* – with immediate and lasting results to restore strength, softness, smoothness and bounce to hair.
DO clarify before K18 if you’re a heavy product user (demineralize for mineral + metal buildup).
DO apply on clean, damp hair.
DO wait the full 4 minutes before combing or styling.
DO add whatever styling products you love after the 4 minutes.
DO use for 4-6 shampoos consecutively for progressive results.
DON'T use conditioner before applying K18 Mask (you can apply after the 4 min but most find they don’t need it).
DON'T overdo it—less is more.
DON'T rinse it out.
key benefits
**Takes damage repair further** – reconnects both polypeptide chains (and as a result, also reconnects disulfide bonds) for strength along the length + width of the hair - offering comprehensive, lasting damage repair.
**Restores hair from even extreme damage** - by working at the innermost layer of the hair, core strength and elasticity are renewed for strong, smooth, bouncy hair.
**Delivers immediate and lasting results** – hair is repaired from the first use and lasts past your next wash, for ongoing reparative benefits.
**Simplified repair** - convenient, leave-in formula works in just 4 minutes, with no extra rinse required.
**Works on all hair types** – because K18PEPTIDE™ works on a molecular level (where all hair is the same), this product is effective on all hair types.
more to know
- **K18PEPTIDE™**is a biotech-developed peptide that mimics hair's structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during bleaching, color and chemical services + heat*.
- **pH-optimized (5.0-6.0)** to help minimize cuticle swelling + put hair proteins in their most resilient state.
- **Cream format** enables easy, lightweight application across all hair types, with detangling and softening benefits.
- Vegan, color-safe, cruelty-free.
how to use
1. Shampoo, do not condition. Towel-dry thoroughly.
2. Apply 3-9 pumps of ***K18 leave-in molecular repair hair mask*** based on your length and density, starting at the ends and working up towards the roots.
3. Let sit for 4 minutes. Do not rinse out.
4. Comb, add product + style as usual. Use for 4-6 washes post-salon service, then as needed.
The K18 mask works as a treatment to reverse damage in 4 minutes. It’s powered by our biomimetic K18PEPTIDE™ to seamlessly fit in and reconnect broken polypeptide chains at the molecular level. As a result, disulfide bonds are also reconnected for reinforced strength along the length + width of hair—offering comprehensive, lasting, and progressive repair.
what is the k18peptide™?
K18PEPTIDE™ is a biotech-developed peptide that mimics hair’s structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during damage from bleach + color, chemical services, and heat*
Conditioner leaves a film that blocks our peptide from penetrating effectively. Once the 4-minute wait time is up, feel free to use a conditioner, a leave-in, or any type of product.
i noticed there’s alcohol in the formula, isn’t that bad for you?
We like to keep our formulas minimal, only using the exact amount of ingredients needed to get the peptide where it needs to go. Here the alcohol serves as an agent to optimize the hair environment for the K18 mask to work on a deeper level. Our unique blend of 3 alcohols functions to open the hair cuticle so the K18PEPTIDE™ can penetrate the innermost layer of hair, reaching the broken polypeptide chains (keratin chains).
when should i expect to see results?
Most see results after 2-3 uses. The more damaged the hair, the more dramatic the results so it may vary depending on your hair type and level of damage.
soft, strong, bouncy hair for everyone
Repair damage for hair like new* in 4 minutes.
before
after
"I absolutely love this product!! You have to see it to believe it!"
- Christina Marie P.
before
after
“…I had my hair chopped (it was begging for it) along with some highlights and coloring of the roots. My hair stylist used this on my hair and I absolutely loved how it made my hair feel ... I love this mask so much!”
- Ashley P.
before
after
"Amazing the way it feels and the shine provides to the hair instantly."
- Sandra M.
before
after
"I’ve been using this mask for about four washes so far. I feel that my hair is getting healthier."
- Olga S.
before
after
"It makes my hair so soft and weightless, I absolutely love it... Makes my hair feel so luxurious, it’s like I just left the salon. Can’t recommend this product more!"
- Anastasiia T.
before
after
"My hair has been a mess for years... My new hair stylist recommended K18! ... My hair looks and feels amazing with lasting results!!"
- Arnell M
before
after
"I have heat damaged color treated curly hair and this has improved my hair health immensely...This is one of those products that has incorporated itself into my routine for the rest of my life..."
- Siria A.
Testimonials and before/after images reproduced from the official K18Hair website; results vary. Snapshot: November 12, 2026.
powered by K18PEPTIDE™
Biomimetic peptide clicks into hair’s keratin structure—the source of core strength—for soft, shiny, bouncy results that won’t wash away.
4.7★★★★★Based on 9,593 reviews at the official source
Source: official K18Hair product page. Public snapshot captured November 12, 2026. The official site combines reviews across hair-mask sizes and related mask listings. 100 saved reviews are shown here; these are not verified purchases from this store and do not automatically synchronize.
Julie
★★★★★
Look no further
My hair stylist turned me onto this product. I have naturally curly hair which tends on the dry side and I color my hair. I have searched for a product for years that does what this product does for me. It is amazing the transformation in just one application sis for my hair. I find I actually need less styling product also, my hair now has a healthy moisture content and my curls have never looked better.
All the products I have tried to nourish and hydrate my curls have only done the opposite.
This product helps with my frizz and I find I can extend time between washes.
Call my 100% happy with K18 Leave In.
Highly recommend
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: Verified Reviewer; not verified by this store.
Deborah L.
★★★★★
Wonderful product
My hairdresser started using this on me as my hair had started breaking off and drying out after a recent weight loss. The changes in my hair with this product along with the peptide prep shampoo are unbelievable! I now only wash my hair every 2-3, sometimes to the 4th day and my hair is so much healthier and fuller. Love your products!
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Liz B.
★★★★★
Less breakage!
My hair has been breaking so much less since starting K18 - the baby hairs around my crown are actually growing long for the first time! A life saver for my color treated hair
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Stacy D.
★★★★★
K18 unbelievably amazing!
I’ve been using this product along with a K 18 molecule repair oil for about three months and they have changed my hair. Before using them, my hair seem to be a little dry not shiny sort of blah but now after using them, my hair shines. It’s beautiful. I just love it..
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Maria K.
★★★★★
So far so good!
I have extremely dry gray hair. Yuck. I want beautiful lusterous and shiny gray hair. I researched online about the best way to achieve that and k18 Was mentioned the most. So far I've done the mask with prep shampoo. I followed up with the oil. It looked so good that I ordered the regular shampoo and conditioner. Its been less than a week. I've used each product one time and my hair is already way less frizzy. I'm Very happy and look forward to seeing even more improvement over time.
Original product: Leave-In Molecular Repair Hair Mask Deluxe Sample. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Constance C.
★★★★★
Perfect
Such an amazing product!
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Rebecca
★★★★☆
4 stars
4 stars
Original product: Leave-In Molecular Repair Hair Mask Deluxe Sample. Original source verification: verified at source; not verified by this store.
Rebecca M.
★★★★☆
Hair mask - leave in
Makes my hair feel smoother and easier to comb.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
None
★★★★★
5 stars
5 stars
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Erin H.
★★★★★
Great for bleached hair
Gives my bleached hair new life again!
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Kristy
★☆☆☆☆
1 Star
It smells
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. .
Chris B.
★★★★★
Obsessed
The fact that I can travel with this and get a treatment in is perfect! Such a magical product to bring damaged hair back to life!
Original product: Leave-In Molecular Repair Hair Mask Deluxe Sample. Original source verification: verified at source; not verified by this store.
rebecca
★★★★★
I love this stuff
I've been using this for almost a year and my hair is so much stronger than it once was. I recommend it to anyone who wants healthy hair.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Glennys
★★★★★
5 Stars
Nice
Original product: Mini Leave-In Molecular Repair Hair Mask 15 mL. .
Jean W.
★★★★★
Aging Gray Hair Solution
The decision to stop coloring my hair wasn’t an easy one. Hair is more fragile when it grays, so coloring was not good. At 65 years of age, I also decided to go longer after wearing it short most of my life. It’s now shoulder length and I am not exaggerating when I say that K18 made it possible for me to do this, because healthy long gray hair can look beautiful. If I couldn’t accomplish that, and would’ve had dry frizzy long gray hair, I wouldn’t have done it. I get compliments on my hair and I have K18 to thank for this. I have not been to a hair salon for over 1 1/2 years and I plan on continuing to let my hair grow long and natural. Yes, it is expensive but it’s been well worth it to me.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Caroline K.
★★★★★
It works
I do a clarifying shampoo or the peptide prep prior to puting n the mask. Over the last 6 months my hair has transformed to healthier and longer.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Sezen K.
★★★★★
Amazing product
I have damaged hair and really helped to heal my hair!
Thank you
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Rebecca F.
★★★★★
amazing
run don’t walk and buy it!!!
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Abbegail K.
★★★★★
Amazing Product!
I’ve been using the leave in hair repair mask for about 4 months now and it has absolutely helped my hair break less, feel silky smooth and does help detangle wet hair. Recently I’ve had multiple people ask me if I have extensions in my hair! With less breakage, it is getting longer and staying fuller! I definitely would recommend this product, currently buying some for my mom to try!
Photos: May, September and now in November
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Joyce W.
★★★★★
Works Well
I used it on my dyed hair. It does bring color back to life and I do see less split ends. You can see how long my hair is now with the product
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Etzania C.
★★★★★
Perfect for my trips
I always take a travel size of my favorite treatment every trip :)
Original product: Leave-In Molecular Repair Hair Mask Deluxe Sample. Original source verification: verified at source; not verified by this store.
Etzania C.
★★★★★
I love it
This is one product that I just can’t live without 🫶🏼 this my third bottle and I just love it.. my hair is very frizzy and fine, and has a lot of damage with dried ends but oily scalp. This treatment has been a life saver, and my hair is more manageable, smooth and shiny.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Carolina F.
★★★★★
amazing product
i have bleached damaged hair and this is the only product that has made a difference in my hair. i love it
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Julie K.
★★★★★
This is life changing!
I started using this a month ago and my hair is stronger and healthier, I am addicted!
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Janna
★★★★★
5 Stars
Love this product
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. .
katerina M.
★★★★★
Excellent mask
I love this mask. It provides excellent hydration. I use it once a week. It leaves my hair soft and manageable.
Original product: Leave-In Molecular Repair Hair Mask Deluxe Sample. Original source verification: verified at source; not verified by this store.
Katherine K.
★★★★★
Mask
Absolutely love love love this product. It protects your hair better than anything I’ve ever found. I happen to be in Oklahoma and a girl told me a BD operator told me about this product. She didn’t know much about it but had heard about it and my hair was breaking off so bad so I tried it. It’s the best there’s nothing compared to it.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Norma
★★★★★
5 Stars
works good
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. .
Ebru B.
★★★★★
Great product
The improvement was immediate, even my hairdresser noticed it before I said anything. I will report back after 5-6 use. So far so good!!
Original product: Mini Leave-In Molecular Repair Hair Mask 15 mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Melanie
★★★★★
5 Stars
de los mejoresz peeo muy caro :(
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. .
Michael S.
★★★★★
MAGIC RESTORATION! ✨
I recently had my hair bleached, and my ends and lighter blonde sections were left terribly damaged. This product restored my damaged hair in just ONE DAY!
I’m honestly so amazed. It feels like magic!!!
My hair was stretchy like chewing gum, tangled, and had broken ends.
And after just ONE use… WOW! Everything improved so much!
Honestly, this product is THE BEST! 🤍
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Nicole W.
★★★★★
Leave in Molecular Repair Mask
This product is amazing! My hair feels so soft, tangle free and healthy. It's my favorite weekly ritual.
Original product: Mini Leave-In Molecular Repair Hair Mask 15 mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Jon S.
★★★★★
The best hair mask out there
Love the K18 hair mask. I have been using it for several years and won’t go without it.
Love the jumbo size. Value is good.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Mary
★★★★★
Love it!
Makes your hair look and feel rejuvenated.
Original product: K18 x Future Society Limited Edition Scent Mask. Original source verification: verified at source; not verified by this store.
Argentina C.
★★★★★
Best
My dark brown curly hair gets re-touched and dyed to copper several times a year, and these have helped keep it SOFT and HEALTHY.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store.
Argentina C.
★★★★★
Best leave-in
My dark brown curly hair gets re-touched and dyed to copper several times a year, and these have helped keep it SOFT and HEALTHY.
Original product: Leave-In Molecular Repair Hair Mask Deluxe Sample. Original source verification: verified at source; not verified by this store.
Eva S.
★★★★★
Really makes a difference
I have been using this for over a year now and I truly feel it is helping control breakage and maximize growth and overall hair strength.
Original product: Leave-In Molecular Repair Hair Mask Deluxe Sample. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Christina
★★★★★
5 Stars
I love this stuff also got it on auto delivery because it's the best and I love how auto delivery checks with me to make sure I need it and if I don't need it they'll hold back but they always check with me and I love that best product definitely recommend 10 out of 10 chef's kiss
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. .
Teresa
★★★★★
5 Stars
It’s a great product! That’s why I took advantage of the deal.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. .
Customer
★★★★★
5 stars
5 stars
Original product: K18 x Future Society Limited Edition Scent Mask. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Nicholas
★★★★★
5 Stars
Love it
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. .
An Y.
★★★★★
Amazing!
My hairstylist noticed my hair is getting healthier. I mentioned that I use K18 hair mask. He said that’s THE one he only uses.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Diana G.
★★★★★
Leave in Molecular
My hair dresser uses this product and I started using it in between my visits to her. I love the way it makes my hair feel. Very soft and shiny.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Marta A. R.
★★★☆☆
Seems to work but weird smell
I have relatively long hair so I had to use three pumps and I followed the directions verbatim. I could immediately tell that my hair was reacting to this product. It appeared to smooth it out and almost straighten some of my waves. I liked the outcome. As minutes passed, I realized that my hair was looking a bit frizzy so I added some of my old product to it and it seemed to do the trick. I don’t like the odor of the product but will continue to use it more as recommended and see how it goes.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Vanessa
★★★★★
5 Stars
Love the scent!!
Original product: K18 x Future Society Limited Edition Scent Mask. .
Katie
★★★★★
5 Stars
Wish their products were just a little less pricey, but BOY do they work!
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. .
Kristi B.
★★★★★
Love this item
My hair feels fuller and healthier after using this.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Angela C.
★★★★★
LOVE
LITERALLY SMELLS SO GOOD!!! I LOVE IT
Original product: K18 x Future Society Limited Edition Scent Mask. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Darlene L.
★★★★★
Amazing Results
I had reservations with the very small amount of product the directions said to use for my relatively long hair, but I decided to follow the directs because the amount in each bottle is somewhat smaller than most other similar products.
I was absolutely amazed at how soft and manageable my hair felt with such a small amount. The Florida weather is horrible for my wavy processed hair, but after I applied the leave-in mask my hair was much smoother with no frizz.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Melissa H.
★★★★★
Buy it now
Excellent product! Works great for overworked, aging hair. Smooth and shiny without buildup!
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Nancy H.
★★★☆☆
Still hopeful
I have color treated my hair for many years, and it is dry and frizzy. I have tried many expensive products to reduce dryness and frizz, but nothing worked. My salon suggested I try K18 leave in mask. I've done 4 treatments with it, and my hair is slowly returning to a more healthier look and feel. I hope it continues to improve over the next several weeks.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Sultana H.
★★★★★
Fantastic
This stuff is a necessity for my bleached hair, I always feel and see the results of smoother and stronger hair
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Leslie M.
★★★★★
Magic
I have super bleached platinum hair and this stuff makes it feel so healthy and strong. And my hair has been able to reach close to my waist in length.
Original product: K18 x Future Society Limited Edition Scent Mask. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Debra S.
★★★★★
Best hair repair treatment on the market
My hair was fried by a stylist so bad it was bumpy the entire length of my hair. I tried every other hair repair product on the market to repair it and to keep it from breaking off K18 is what got my hair back to normal, healed the damage and saved my hair.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Elena B.
★★★★★
Mask
I was a bit skeptical but wow! An amazing product! Must have seen some celeb rave in the Post . Purchased. Adore ! Am 61! 10/10
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
vicky c.
★★★★★
Long lasting change
I’ve been using this product for the last six months, and I have noticed a change in my hair quality, though I’m at a point in my life where it doesn't grow as fast, but I’ve noticed that the split ends have become fewer and there has been a difference in the texture of my hair
Original product: K18 x Future Society Limited Edition Scent Mask. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Mary- B. R.
★★★★★
Greatest sample great for travel!!
Easy open close love it!
Original product: Leave-In Molecular Repair Hair Mask Deluxe Sample. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Marcia S.
★★★★★
Wow!
My hairdresser introduced me to K18 Leave-In Molecular Repair Mask. I couldn't believe the difference in my dry ends as my hair had gotten to the point where it could not hold a wave. Now with this product my hair is shiny, fuller and has a wave. I love it and am now sending a bottle of it to my daughter.
Thanks! Marcia
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Rebecca
★★★★★
5 Stars
This is amazing I love love it. Works better than anything I have seen.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. .
Megan S.
★★★★★
Healthier
After having my hair highlighted-I used K18 conditioner after every washing. My hair now feels healthier than before coloring
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Tiffany T.
★★★★★
It works.
I’m 53 with post-menopausal hair loss. I’ve spent a fortune on different products and this is the first one to noticeably work. I’ve been using it for five months and my hair has completely transformed. It’s stronger, thicker with less loss. It’s very expensive but if you want real results it works.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: Verified Reviewer; not verified by this store.
Carol B.
★★★★★
Older, drier, too textured hair
The leave-in product has amazed me. I hate to look at my 61-year old self in the mirror. This product has made my hair look healthy, flexible, and youthful. I’m currently using it as a leave-in conditioner. I can’t imagine what happens to your hair if you use it as a mask.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
REBECCA H.
★★★★★
Best product
I have very fine hair that will not grow past my shoulders without this product. In love with this.!!!
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Francesca H.
★★★★★
Hair mask
since using K18 hair mask my hair is so much healthier! It used to be brittle and break. My hair finally feels soft and it Finally growing!
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Angela T.
★★★★★
Love k18!
Has helped my hair so much!
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Kelly M.
★★★★★
Great
My hair stylist recommended this after I accidentally burned my hair with a hot tool. I see improvement every wash.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Sheryl H.
★★★★★
Great product, new limited scent
I love this product. It keeps my highlighted hair in a much healthier condition than without it. I always make sure I have it on hand. I also really like this limited-edition scent!
Original product: K18 x Future Society Limited Edition Scent Mask. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Jennifer D.
★★★★★
Dry, Brittle Hair Rescue!
After trying a couple professional products from other brands, I decided to spend the money on K18. I was certain I wasted more money, but even after only 2 uses, I am seeing and feeling softer, healthier hair. Make the investment-it’s worth it!
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Caitlin J.
★★★★★
Best mask
Love it
Original product: Leave-In Molecular Repair Hair Mask Deluxe Sample. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Tara G.
★★★★★
Hair Strength and Growth
I've enjoyed using K18 since it first came out! My hair is the longest it's been in years and I attribute it to improving my hairs strength and repairing damage.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Sabina A.
★★★★★
Great product
Did an amazing job in treating my hair texture from the first application.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Glenny
★☆☆☆☆
1 Star
pedí unas muestras que venían con el producto y no me enviaron nada 🤨
Original product: K18 x Future Society Limited Edition Scent Mask. .
Jamilet F.
★★★★★
Muy bueno
Mejorando
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Christina L.
★★★★★
Love Love Love
I’ve tried everything on the market & this is by far the best product! Been using for over a year & my lightened hair couldn’t be in better shape!
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Karen C.
★★★★★
Amazing!
My hair has gotten dry and coarse over the past few years after using lightener. After using this, my hair is soft, manageable, and even has a little shine. It's the only thing I've found that works without weighing my hair down.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Christina B.
★★★★★
It’s worth it!
I was wanting to save some money and I cut out my detox shampoo that I use 3 times a week. This was not a good plan. My hair had never felt really clean. I would wash it 2 times with the shampoo and still. I have blonde pixie hair. I use a lot of product. So now I’m using my detox again! Won’t be doing that again! This product truly leave your scalp and hair clean. Gets all the product buildup off as well. I can’t say much more! It’s great on my hair.
Original product: K18 x Future Society Limited Edition Scent Mask. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Xun L.
★★★★★
Amazing
Love it!
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Kristin R.
★★★★★
Hard water and wavy hair
I live in TX where the water is not so great. My wavy hair has suffered but with this mask she has been revived! I have fine hair so I do periodically. I use the shampoo and conditioner as well. Love these products 🩵🩵🩵
Original product: Mini Leave-In Molecular Repair Hair Mask 15 mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
amanda
★★★★★
5 Stars
Love it! My hair is thin and very curly makes the end, very smooth and keeps it full and bouncy
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. .
Aileen S.
★★★★★
Excellent
Great product for mature hair!!!
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Diane S.
★★★★★
Frizz is gone
No matter what I’ve tried my frizz was there but not since I started this repair mask. After using it 4 times my frizz has gone.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Valentina S. B.
★★★★★
Great product
Very hydrating.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
frances d.
★★★★★
Gold Standard!
This was the first K18 hair product that I ever used!
Have been a huge fan ever since. Every person I’ve gifted, loved instantly!
Original product: Leave-In Molecular Repair Hair Mask Deluxe Sample. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Leah W.
★★★★★
Great Product
I use this with on alternate weeks with Olaplex. Really notice a differenxe
Original product: Mini Leave-In Molecular Repair Hair Mask 15 mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
bess b.
★★★★★
Great stuff!!
I haven’t used it long, but my hair is already starting to feel it look healthier
Original product: Mini Leave-In Molecular Repair Hair Mask 15 mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Ariane T.
★★★★★
Amazing product
Best hair product to date.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Priscila C.
★★★★★
Worth every penny
Best hair product I've ever used. My hair feels stronger and healthier after just a few uses, and it's so quick and easy. Will definitely repurchase!
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Kandiss U.
★★★★★
Love love love this stuff!
I’ve been using this hair mask for over a month now and my the texture of my hair has improved dramatically. It’s so soft and shiny and it detangles too!
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Daemon
★★★★★
5 Stars
I love how much more unbleached my hair feels when I used this product, 1st use and it drastically improved how my hair felt
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. .
Sonia D.
★★★★★
Excellent
Love it
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store.
Ongie W.
★★★★★
LOVE!
My hair was getting very thin n short due to illness less than 3 months later it has made a big difference nolonger losing hair or the breakage.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Melinda B.
★★★★★
GREAT HAIR CARE
Absolutely love this Mask. Use it once a week and my hair has changed in so many ways!
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Nola
★★★★★
Works quite well
Great producto because it works!
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Ariyana C. b.
★★★★★
10/10
Love this product sooo much, keeps my clients hair so soft and healthy.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
*Lara
★★★★★
5 Stars
Sample size could be bigger
Original product: Leave-In Molecular Repair Hair Mask Deluxe Sample. .
Lissa
★★★★★
It actually works as described
From all the products from this brand that I've tried, this one is the ONE. It actually helped me reverse years of damage in a few months. Hair recovered its natural bounce, shine, and strength.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store.
Laura P.
★★★★★
Amazing
This product has helped repair my bleached hair.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Jon C. B.
★★★★★
This is the best product ever to cure damaged hair!
I have used this consistently for over a year and it has transformed my hair. Can’t recommend enough!
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store.
Joni R.
★★★★★
Made a difference after the first use!
Was noticing my color treated blonde hair was looking extremely dry and started researching my options for home treatments. I noticed an improvement in my hair the first time I applied k18. Even my hairdresser was impressed with the results.
Original product: Full-Size Leave-In Molecular Repair Hair Mask 50mL. Original source verification: verified at source; not verified by this store; Incentivized review, as disclosed by the source.
Bernadette H.
★★★★☆
Wonderful Conditioner
I love this product, I’ve been using it for almost 6 months. A little goes a long way with no heavy weighing down of my long thin hair.
Original product: Jumbo Leave-In Molecular Repair Hair Mask 100mL. Original source verification: verified at source; not verified by this store.
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