1.0
verified purchase
Not worth it
I have thick curly hair and I honestly didn’t notice any difference.
8/28/2026
What it is: A biotech-engineered, weightless oil that works on all hair types to strengthen, repair damage, reduce frizz at two levels of the hair fiber, and improve shine.Hair Type: Straight, Wavy, Curly, and CoilyHair Texture: Fine, Medium, and ThickHair Concerns:- Frizz- Shine- Damage, Split Ends, and BreakageKey Benefits: - Reverses damage caused by frizz- Smooths frizz and flyaways- Enhances shine and color vibrancyHighlighted Ingredients:- K18PEPTIDE™: Reverses hair damage that causes frizz, promotes strength and smoothness.- Hemisqualane and Squalane: Reinforce hair's moisture barrier, smooth flyaways, enhance shine.- Avocado Oil: Provides heat protection up to 450°F (232°C).Ingredient Callouts: This product is vegan and cruelty-free.What Else You Need to Know: This strengthening, smoothing hair oil works on two levels of the hair fiber to fight frizz. The K18PEPTIDE™ works to address deeper level damage that causes frizz, repairing and strengthening damage at the innermost layer of the hair fiber to reverse damage that leads to frizz. On the surface of hair, natural oils like avocado and sunflower oil and hemisqualane and squalane nurture while smoothing frizz and flyaways to improve color vibrancy, enhance shine, and provide heat protection up to 450°F (232°C).Fragrance Description: Fresh floral scentClinical Results: In a 3rd party clinical study, one use of the K18 Molecular Repair Hair Oil delivered: - 24-hour frizz control* - 104% improvement in shine**- 78% reduction in split ends****Results observed on curly, frizzy hair after 24 hours in 80% relative humidity, with one application of molecular repair hair oil on dry or damp hair**Results observed after a single application of molecular repair hair oil on dry hair ***Results observed on bleached/damaged hair after one application of molecular repair hair oil on dry hairThis product is an Allure Best of Beauty award winner.Clean at Sephora is our commitment to offering effective products without certain ingredients, such as parabens, sulfates, phthalates, and mineral oils. Learn more here.
International delivery
Shipping calculated at checkout
Returns & exchanges
Within 30 days of delivery
What it is: A biotech-engineered, weightless oil that works on all hair types to strengthen, repair damage, reduce frizz at two levels of the hair fiber, and improve shine.Hair Type: Straight, Wavy, Curly, and CoilyHair Texture: Fine, Medium, and ThickHair Concerns:- Frizz- Shine- Damage, Split Ends, and BreakageKey Benefits: - Reverses damage caused by frizz- Smooths frizz and flyaways- Enhances shine and color vibrancyHighlighted Ingredients:- K18PEPTIDE™: Reverses hair damage that causes frizz, promotes strength and smoothness.- Hemisqualane and Squalane: Reinforce hair's moisture barrier, smooth flyaways, enhance shine.- Avocado Oil: Provides heat protection up to 450°F (232°C).Ingredient Callouts: This product is vegan and cruelty-free.What Else You Need to Know: This strengthening, smoothing hair oil works on two levels of the hair fiber to fight frizz. The K18PEPTIDE™ works to address deeper level damage that causes frizz, repairing and strengthening damage at the innermost layer of the hair fiber to reverse damage that leads to frizz. On the surface of hair, natural oils like avocado and sunflower oil and hemisqualane and squalane nurture while smoothing frizz and flyaways to improve color vibrancy, enhance shine, and provide heat protection up to 450°F (232°C).Fragrance Description: Fresh floral scentClinical Results: In a 3rd party clinical study, one use of the K18 Molecular Repair Hair Oil delivered: - 24-hour frizz control* - 104% improvement in shine**- 78% reduction in split ends****Results observed on curly, frizzy hair after 24 hours in 80% relative humidity, with one application of molecular repair hair oil on dry or damp hair**Results observed after a single application of molecular repair hair oil on dry hair ***Results observed on bleached/damaged hair after one application of molecular repair hair oil on dry hairThis product is an Allure Best of Beauty award winner.Clean at Sephora is our commitment to offering effective products without certain ingredients, such as parabens, sulfates, phthalates, and mineral oils. Learn more here.
- SKU
- 2-P505266
- Brand
- K18 Biomimetic Hairscience
- Category
- beauty / hair-care / hair-oils-serums
- Variants
- 1
Customer reviews
5.0
verified purchase
Really effective for colour damage
I use it for colour damaged and dry hair, works very well, I swear by it now. Its also very potent, make sure to only use a couple drop especially when starting out they go surprisingly far. Even a few drops extra can make your hair greasy.
8/25/2026
3.0
verified purchase
Not for low porosity hair; minimal impact
Took stars off because didn’t absorb in low porosity hair, cost, and minimal impact on my wavy/curly hair.
8/20/2026
5.0
verified purchase
It is amazing although very little and expensive - it takes my hair about 10 drops tho not 2-3 like the bottle says. My hair is less frizzy , shinny, and controlled
8/11/2026
4.0
verified purchase
I Actually like it (and I’m so picky)
It’s pretty good tbh I was surprised. I have super damaged (from a recent bleaching) fine hair. & There’s a fine line between shinier and healthier and manageable hair andddd greasy hair lol So just find what works for you but def start small! I use it on my hair straight out the shower and brush it through and I like it. My bf loves the smell too which is always nice.
8/9/2026
5.0
verified purchase
worth every penny
i literally swear by this, it will turn my dry straw-like hair into smooth and shiny
8/3/2026
5.0
verified purchase
Must have
Only product that worked for me and promoted hair growth . This is my 2nd bottle
7/29/2026
5.0
verified purchase
Perfect post-blowout oil to lock in smoothness and
I absolutely love this hair oil! I always use it right after blow-drying my hair as a finishing touch. It works amazingly well to maintain the smoothness of my ends and ensures that there is absolutely no frizz left behind. It leaves my hair looking super sleek, shiny, and feeling incredibly soft without weighing it down. It’s definitely a premium product that is worth every penny for blowout maintenance!
6/5/2026
5.0
verified purchase
A Must
Long curly thin highlighted hair here. Tendency to frizz. This product is amazing! I grabbed my bottle to smell it as I never once found the scent off-putting. It is not perfumey, but I have never noticed my hair smelling anything but clean with this on. As far as how it performs, my hair is soft, nice divided curls, not stringy or greasy and my hair looks healthy, is healthier. I love it and have ordered another bottle. A must.
5/14/2026
5.0
verified purchase
life changing
Where has this been my whole life?! this has changed my frizzy hair into smooth shiny beautiful hair, I can't even put into words the difference. I have tried other oils before and this blows them out of the water zero comparison.
5/14/2026
