★★☆☆☆July 22, 2023
Awful pump, not bad product but over priced
100% over priced and not worth the money. Firstly the pump is infuriatingly hard to get out any product, once you manage the product doesn’t really perform as per marketing. I advise not to use this. Use a keratin shampoo and conditioner instead and add a leave im conditioning bond builder such as the one from revlon. Which is more more effective. Sorry, wanted to like it and I tried a few bottles but nope I don’t understand the hype.
Miss A.Verified purchaseHelpful (8)
★★★★★May 26, 2024
Bought from ulta but wow
I’ve used dozens and dozens of hair styling products to help heal my curl pattern and this is the holy grail. Wish it was more large but you only need this one and done. I use a clarifying shampoo before it and it makes a world of difference. I uploaded a before and after I had used it six times.
SierraHelpful (2)
★★★★★August 11, 2024
Satisfied
This product comes to the rescue for building bonds to strengthen hair. After badly damaging my hair from over bleaching, this has been a lifesaver for regenerating my strands. It's a great relief to skip the conditioner after shampooing then apply this as a leave in, completely removing tangles as well. I am sure to add moisturizer, after the 4+ minute waiting period, as this is not specifically for moisturizing. Sometimes I will alternately apply a good moisture mask on my hair for the day or overnight. Together my hair has been significantly revived.
Angelique M.
★★★★★June 22, 2026
Duradero
Cumple lo que promete y dura mucho tiempo es mejor comprar el formato grande
AsunaVerified purchase
★★★★★February 1, 2026
Kann ich nur empfehlen
Hält was es verspricht. Ja, das Produkt erscheint erstmal teuer, aber es ist bisher das einzige das wirklich die versprochene Wirkung zeigte. Ich habe sehr feines, glattes und etwas über Schulterlanges Haar, welches über Jahre 4-6× pro Jahr gebleicht wurde. Dadurch waren vor allem die letzten 15cm inzwischen sehr geschädigt und strohig. In den vergangenen zwei Jahren hatte ich mich durch diverse Produkte von günstig bis immer teurer durchgearbeitet und bin jedes Mal bei langfristiger Anwendung enttäuscht worden. Manche zeigten gar keine Wirkung manche am Anfang und nach ein paar Anwendungen bereits nicht mehr.
Carina BVerified purchase
★★★★★November 17, 2024
Gift
Bought this for my daughter has a gift. She said she wasn't sure at first because you had to leave it in you're hair it felt a little sticky but once she dried her hair it felt amazing so soft and bouncy felt amazing in condition.
LovetoshopVerified purchase
★★★★★August 26, 2024
Worth the money
In a couple of months after using this product I could see rhe difference in my bleached hair. No more split ends or breakage. The hair got stronger, just need to follow the instructions and use it as it says in the box.
MariaVerified purchase
★★★★★August 24, 2025
Completely recommend this.
May be a bit pricey but does wonders for hair strength and growth. Worth every penny.
Nicole ShamierVerified purchase
★★★★★April 18, 2025
Highly recommend
Very good product, protect the damage and coloured hair, it is third time I ordered this , highly recommended 🥰🥰🥰🥰💖💖💖💖💖
Selena JavaVerified purchase
★★★★★October 7, 2024
Amazing
I’ve a history of never leaving my hair alone, my hairdresser has admitted that I am able to grow it out and not get as much chopped off mainly thanks to using K18 regularly.
ShaneVerified purchase
★★★★★August 12, 2025
Value for money
This has lasted me such a long time, really impressed by the product.
SineadVerified purchase
★★★★★June 2, 2024
Ottimo
Volevo provare da tempo questo brand, ha la consistenza davvero corposa, ne basta una noce e io ho i capelli lunghi e nemmeno troppo fini, pagato 75 euro ma usato così durerà davvero una vita, non ha odore, e si stende molto facilmente, vi consiglio di non usare altre creme per lo styling in combinata con questo ma piuttosto degli spray, se non volete ritrovarvi capelli appesantiti, ma comunque molto molto morbidi e al tatto sicuramente più corposi, avendo un ossessione per i capelli lo uso in alternanza con altri mille prodotti di altri brand, ma questo è uno dei miei preferiti.
andreaVerified purchase
★★★★★March 25, 2025
Super easy and effective 10/10
I have been using this for about a year now so I feel ready to write a proper review. It says on the label that you should put it on damp hair and that you don't need to use conditioner BUT I managed to find someone who had emailed the company and asked about whether or not you could apply conditioner after and their reply was that after the 4.5 minutes, you can wash it out and add conditioner and it won't affect the effectiveness of the treatment. K18 only works for 4.5 minutes so if your hair needs conditioner - apply it after those 4.5 minutes. This has changed everything for me. My current routine is washing my hair with shampoo, I towel dry my hair gently and then apply a couple of pumps of K18 into my palms, I rub them together to get an even spread on both hands and then i flip my head over and scrunch in the product. I leave it as it is for 5 minutes while I get ready and then I wet my hair again and apply a conditioner. My hair is SO healthy now. Every time I get my hair cut I apply this every wash for the first 4 washes and then I only use it once every two weeks/once a month depending on how much heat styling I do.
AVerified purchase
★☆☆☆☆December 4, 2023
Pump doesn’t work no matter how much I try.
Awful pump that doesn’t work, I guess it came broken. Also product came beaten up as you can see. Wouldn’t spend my money on it again.
RawanVerified purchase
