










🧴 Unlock molecular hair repair in minutes—because your hair deserves the future, now!
K18 Leave-In Molecular Hair Mask is a revolutionary 4-minute treatment powered by patented K18PEPTIDE technology that repairs and reverses hair damage caused by bleach, heat, and chemical services. Suitable for all hair types, this vegan, clean formula delivers soft, strong, and bouncy hair without rinsing or conditioning, making it the ultimate fast-acting solution for professional-grade hair revival.













| ASIN | B09HR5KSR8 |
| ASIN | B09HR5KSR8 |
| Age Range Description | Adult |
| Benefits | Reverses damage in 4 minutes |
| Best Sellers Rank | 1,409 in Beauty ( See Top 100 in Beauty ) 5 in Hair Masks |
| Brand Name | K18 |
| Customer Reviews | 4.2 4.2 out of 5 stars (27,467) |
| Customer reviews | 4.2 4.2 out of 5 stars (27,467) |
| Date First Available | 26 Sept. 2022 |
| Global Trade Identification Number | 00858511001289 |
| Hair Conditioner Type | Deep Hair Conditioner |
| Hair Type | All |
| Item Dimensions | 35 x 35 x 81 millimetres |
| Item Form | Cream |
| Item Weight | 1 Ounces |
| Item model number | K18-31007 |
| Liquid Volume | 15 Cubic Metres |
| Manufacturer | K18 |
| Manufacturer | K18 |
| Material Features | Molecular Repair, Vegan |
| Material Type Free | Free from parabens, silicone, sulfates, alcohol, and artificial dyes |
| Number of Items | 1 |
| Package Type Name | Tube |
| Product Dimensions | 3.48 x 3.48 x 8.08 cm; 28.35 g |
| Product Warranty | 2 year manufacturer |
| Recommended Uses For Product | damaged hair |
| Scent Name | Fresh |
| Special Features | Molecular Repair |
| UPC | 858511001289 746559900490 858511001371 |
| Unit Count | 15.0 millilitre(s) |
K**N
The best!
Regular heat and bleach is used on my hair and was incredibly damaged. This helped to reverse the damage in 6 weeks and I now use it as maintenance once a week. It is very pricey but definitely worth the money if used correctly. Shampoo, towel dry hair, apply and wait 4 minutes minimum then condition as normal. I also use a hair mask after conditioner and my hair has never felt better.
K**E
Great
Really helps damaged or dry hair. Fantastic product
B**L
Expensive but worth it
I have used this once and the difference already is significant. My hair was fried after a disaster with a home colour and then colour correction, my ends were crispy and my hair was looking very sorry for itself. I worried about not conditioning my hair but it didn’t matter as the K18 made it feel fabulous, so soft and smooth. Yes it’s expensive but when the only other option it to cut my long hair off it is worth every penny. Hopefully with more use I will see even more improvement. Yes I definitely recommend this.
E**A
Waste of money
This is an overpriced "hair mask" that has done nothing to my hair. Save your money and do not trust social media hyped products.
C**N
Noticeably stronger hair, but you must use it correctly
I was very curious to try the K18 Leave-In Molecular Hair Mask because my hair has been through a lot: bleach, colour, and heat styling. After a few uses, I can honestly say it does make a difference, but it’s not exactly a miracle in one wash. First, it’s important to follow the instructions: shampoo, skip conditioner, towel-dry your hair, and apply a small amount. You really only need a tiny pump. The product feels light and not greasy, which I like, and it doesn’t weigh my hair down. After about 3–4 uses, my hair started to feel stronger and less brittle, especially on the ends where bleach damage is the worst. It doesn’t make the hair super silky like a traditional mask, but it improves the structure of the hair over time. My hair feels healthier and looks a bit smoother. The downside is the price for such a small bottle. Also, if you’re expecting instant softness like a regular deep conditioner, you might be disappointed because that’s not really what this product is designed to do. Overall, it’s a very interesting treatment for damaged hair and I can see why it’s popular. It takes consistency, but it does help improve the strength of over-processed hair
M**I
Like magic
Don't think, just buy it. My hair is thick and wavy and is quite damaged due to heat and colouring. I tried Olaplex before but it didn't really helped my hair. K18 worked like magic, I've used it 3 times and my hair just looks and feels healthy! Defo worth the money
V**B
K18 is a total Game Changer
This has totally changed my life! Having had long, lanky and extra fine hair I decided to have blonde highlights to try and give it volume. I found an excellent colour technician who came highly recommended and she recommended I use K18 once a week. Well, this has been an absolute game changer! I even get compliments from family and friends which never happened before. My hair seems to have improved in strength, is glossy and very easy to manage. Every day looks like a fresh out of the salon day. Yes, it’s pricey but you only have to use a very small amount once a week. It should last for ages at this rate. Whatever magic ingredient is in this the inventor has to applauded. I will keep on recommending it as I’m so happy. Just buy it and see for yourself.
H**S
Not sure...
I'm really not sure about this product. I do, however, have opinions. Ultimately the jury's out about the benefits and healing treatment on the hair long term, I have a few more uses left. I think my thoughts (which are complicated) could best be summed up as pros and cons for brevity's sake. Pros: - I fried my hair trying to add an auburn sheen - I used to dye my hair a lot and should have known better than to try again, but I was not prepared for the frizz I unleashed! Since the 2nd-or-so K18 application, my frizz is a lot less (but NOT gone!) - My hair does feel very soft - Frying my hair drastically reduced my natural curls, K18 may have helped start to bring these back - however changing my conditioner may have changed that too. Cons: - Price. Much like Olaplex, I feel this is very, very overpriced for what you get. The changes are not THAT amazing, and the amount of product is criminal. - Packaging. £30 for a 15ml, which is in an air-tight plastic pump that you cannot open to get any product left in the tube. I'm fully willing to bet there's a lot of product wastage there! - Hype. Hype never does anything any favours long term... yes, I think it helped with my damage from dying, but nothing's a miracle product and YMMV as to how much this helps you or not, how much a difference it makes or not. Personally it did make a difference for me, but I still expected more from the hype. - Long term benefit. I'm not sure about the long term pros of this product. - Method. How you're meant to use this product is very strict and I don't think it will work that well if you don't follow the instructions. Personally, my hair NEEDS a good conditioner, so having to omit conditioner... not so great. Also they recommend using it for multiple washes in a row - my hair cannot go multiple washes with shampoo each time and no conditioner each time, no way. And then there's the cost of using it for each wash, multiple washes in a row! - Amount. Goes back to price. I don't have masses of hair but I do have thick, longish hair and I could not make the amount they suggest stretch through all that. I had to use more, and that gets £££ as you burn through product. Ultimately, it's not a miracle product. It's a fairly decent product IF you have hair damage from chemical/heat, but if you're battling with just frizzy/thirsty/etc. hair I don't think it will do much. I do think the amount it will help you varies from person to person by a lot. And I really do think rave reviews, hype and marketing oversell how beneficial this product is. It is very expensive for what it is, and I think if you know your hair type and needs and have time to research or money to try new things, you can get better products which, if not cheaper, are at least more targeted for what you specifically need. It is marketed as a long term use product which is just not accessible price-wise for many people, myself included, and I don't know if the benefits will get any better than what it has already done for my hair. But it did help with damage in my specific circumstances - not to a miracle level but to a noticeable level. If you have the disposable income AND have chemical/heat damaged hair, give it a go. I would not splurge on a big size to begin with though, and I would be very, very realistic about the results and cost-to-impact you are going to see.
R**N
Second purchase now, and is impressive when using and left in hair as recommended. Styles well, and leaves hair soft and silky as opposed dry and bushy. However, the next day you would never know, so undecided if would purchase again a third time.
E**N
Leverans som utlovat. Produkten gör mitt silkesmjukt, mycket nöjd än så länge!
I**O
fortalece bastante. com certeza vou comprar de novo.
C**A
Would absolutely recommend to improve hair
Y**H
I can say that this product was good but i think the product was too small for the price.
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