hey hey! I hope all is well. today I’m sharing my thoughts on the very popular K18 leave in mask
Since its launch in 2021, the K18 leave in mask has been EVERYWHERE. Everybody and their mama and best friend in the hair community has tried K18 by now so when it finally appeared in one of the advent calendars I was so excited.
K18 is a peptide leave in mask that promises to work in just 4 mins on all hair types and textures reversing damage from heat, chemical services and bleaching/coloring. You are directed to use it 4-6 times consecutively for progressive results then switch to maintenance use
Experience
I used K18 as directed for the 1st time back in 2024 and I HATED it! I hated it so much that I didn’t use it again until March 2026- LMAO. It left my hair so dry and CRUSTY and it felt weird not rinsing it out or not using a conditioner. I think I have PTSD lol because how can still remember this almost 2 years later LOL
Anyways this year I was really determined to finish and give it another chance so I did a bit more research on 4c hair use and a lot of people use as directed but follow up with a mask for hydration so I thought to try that. So in March I used it 4 times consecutively, leave it in for 4 mins before following with a mask, I used the Amika hydrorush mask left on for additional 20 mins before washing it out. I took a break in April as it was then time for my usual Olapex treatments- I didn’t want to use them together in the same wash day. I also then had a wig on for holiday. I used the last bit last week.
Usage is pretty easy: after washing and towel drying my hair, I split my hair into 4 sections, use a pump and a bit per section and cover with a shower cap. The texture is lightweight and feels like a lotion so it spreads well. it is not slippery so I didnt even try to detangle with it
Results
In total K18 lasted about 5 wash days. 1st time in 2024, in March 26- 4 weekly washes then final use last week but there was only a little left and it did half my head
Honestly I don’t know if it did anything to my hair. I was sure to pair it with masks I was already familiar with so I could tell if there was any additional benefits. My hair didn’t feel any different in March after using it weekly. I had my routine trim in April and I was told I have a few travelling split ends and some damage and I immediately thought but I’ve been using k18? I don’t think they explicitly say it repairs split ends but I feel my damage might be from heat? back in feb I got the wavy talk thermal brush and I may have abused it on my fine hair lol so if k18 repairs heat damage then shouldn’t my hair app have gone differently?
Verdict
I don’t know. I don’t feel like my hair is any different after k18 use. I have now finished the bottle, I had the 50ml size. I might have been heavy handed as it lasted 5 washes. I wont buy this again, I think for now I will stick to Olapex as my standard bonding treatment.
K18 is available from SpaceNK from£30