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K18 = Sephora

K18 Biomimetic Hairscience

Get hair like new* with K18's biology-first haircare, designed to make the impossible possible.

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Reviews

4.7

446 Reviews

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Recent Reviews

kmonte14

4

12/9/2025

Amazing just pricy

I love this product it really works for my hair type great at detangling and as a heat protectant. I do have extremely long thick hair but that’s part of the reason I am not giving it 5 stars for the amount of product I do feel it is too expensive expensive

Recommended

Originally posted on sephora.com

advinam

Verified Buyer

1

12/8/2025

Wanted to love it but did not work for me

Context: Thick, coarse, wavy 2B hair (Indian) and I use the K18 shampoos, conditioner, mask, and oil as my go-to hair products. I use the Dyson Airwrap to style my hair with most washes (1-2x a week). I had high hopes and really wanted to love this product because I've been a big fan of every other K18 product I've tried. This product somehow managed to make my roots feel so heavy, greasy and sticky while also making the ends of my hair dry, dull, and frizzy. It looked so bad. I gave it 4 tries with different hair washing methods to see if there was user error, or if there were better methods/variations but it just didn't work for me. I'd hoped it would work seamlessly since I use the K18 shampoo and conditioner anyway. I'm back to using the Bumble & Bumble Invisible Oil Heat Protectant, K18 oil, with the Kerastase elixir to finish, and my hair is back to its shiny, smooth, and frizz-free look. I also couldn't find any non-sponsored reviews when I purchased this so that should've been a clue that it doesn't work that well.

Originally posted on sephora.com

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