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Mini molecular repair hair oil 10 mL
Regular price £27
Regular price £0 Sale price £27
molecular repair hair oil
mini hair oil bottle with product details beside it.
Bleach blonde hair before and after results using k18.
Red curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
Grey curly hair before and after results using k18.
highly concentrated formula. start with 1-3 drops, build as needed.
silicone-free weightless oil is powered: K18PEPTIDE(TM), Avocado Oil, Sunflower Oil, Hemisqualane + Squalane.
how damage + frizz related? before + after of outer and inner layer
are you using K18 mask today?
K18 vs. other oils
Mini versus full size product comparison
K18 routine guide
molecular repair hair oil
mini hair oil bottle with product details beside it.
Bleach blonde hair before and after results using k18.
Red curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
Grey curly hair before and after results using k18.
highly concentrated formula. start with 1-3 drops, build as needed.
silicone-free weightless oil is powered: K18PEPTIDE(TM), Avocado Oil, Sunflower Oil, Hemisqualane + Squalane.
how damage + frizz related? before + after of outer and inner layer
are you using K18 mask today?
K18 vs. other oils
Mini versus full size product comparison
K18 routine guide
4.8
Rated 4.8 out of 5 stars
1,010 Reviews

mini molecular repair hair oil

Weightless oil that strengthens, repairs damage + reduces frizz

Size:
10 mL
Regular price £27
Regular price £0 Sale price £27
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Color:
10 mL

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molecular repair hair oil

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description

This biotech-engineered weightless oil works on all hair types to strengthen, repair damage, reduce frizz at two levels of the hair fiber, and improve shine.

clinically proven damage repair

24-HR frizz control

104% more shine

78% reduction in split ends

450°F (232°C) heat protection

    • how to use

      Apply to damp, towel-dried hair before styling, or on dry hair as a finisher. Highly concentrated formula. Start with 1-3 drops and build as needed.

      **Use on damp hair for:** strengthening benefits and to reduce frizz during air-dry or styling.

      **Use on dry hair to:** smooth frizz and flyaways, as a finisher to add shine.

      * Apply to damp hair from mid-lengths to ends. For strengthening benefits from the K18PEPTIDE™ wait 4 minutes before styling.
      * Apply to dry hair as a finisher.

      *Pro Tip - If using the K18 molecular repair mask, apply the mask first on clean, damp hair, then wait 4 minutes. Apply the molecular repair hair oil, and wait 4 minutes for maximum strengthening results.*

    • more to know

      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 hair to reverse damage that leads to frizz.

      On the surface of hair, natural oils like avocado and sunflower oil, and hemisqualane and squalane nourish while smoothing frizz + flyaways to improve color vibrancy, enhance shine, and provide 450°F (232°C) heat protection.

      * Clinically proven to repair damaged hair.*
      * 24-HR frizz control*
      * 104% increase in shine*
      * 78% reduction in split ends*
      * 450°F (232°C) heat protection*

      *Disclaimers

    • key benefits

      This silicone-free oil fights frizz differently by addressing the damage that causes frizz long-term and immediately smoothing frizz + flyaways.

      * **Reverses frizz-causing damage:** Works at the molecular level to repair damaged hair, which is more susceptible to frizz.
      * **Reduces frizz + flyaways:** Natural oils work on the surface of the hair to smooth the cuticle + soften without weighing hair down.
      * **Enhances shine + color vibrancy:** Nourished, moisturized hair reflects higher shine and boosts color dimension.
      * **Delivers heat protection:** to prevent further frizz-causing damage up to 450°F (232°C).

    • ingredients

      Caprylyl Caprylate/Caprate, Squalane, Persea Gratissima (Avocado) Oil, Helianthus Annuus (Sunflower) Oil, C13-15 Alkane, Undecane, Benzyl Alcohol, Tridecane, Castor Isostearate Succinate, Propanediol, sh-Oligopeptide-78, Fragrance (Parfum), Tocopherol, Cinnamal, Hexyl Cinnamal, Limonene, Linalool.

pairs well with
full-size leave-in molecular repair hair mask
Press + and − keys to zoom, arrow keys to pan.
molecular repair hair oil
mini hair oil bottle with product details beside it.
Bleach blonde hair before and after results using k18.
Red curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
Grey curly hair before and after results using k18.
highly concentrated formula. start with 1-3 drops, build as needed.
silicone-free weightless oil is powered: K18PEPTIDE(TM), Avocado Oil, Sunflower Oil, Hemisqualane + Squalane.
how damage + frizz related? before + after of outer and inner layer
are you using K18 mask today?
K18 vs. other oils
Mini versus full size product comparison
K18 routine guide
molecular repair hair oil
mini hair oil bottle with product details beside it.
Bleach blonde hair before and after results using k18.
Red curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
Grey curly hair before and after results using k18.
highly concentrated formula. start with 1-3 drops, build as needed.
silicone-free weightless oil is powered: K18PEPTIDE(TM), Avocado Oil, Sunflower Oil, Hemisqualane + Squalane.
how damage + frizz related? before + after of outer and inner layer
are you using K18 mask today?
K18 vs. other oils
Mini versus full size product comparison
K18 routine guide
got questions?

Get started here.

Can i use the molecular repair hair oil instead of the mask?

We recommend using the oil with the mask for maximum molecular repair with additional styling benefits. Think of the mask as a damage repair treatment after washing your hair. The oil is for smoothing, styling and strengthening after the mask, and can be used on damp and dry hair.

Does the molecular repair hair oil provide heat protection?

Yes, this oil provides heat protection up to 450°F/232°C.

Will the molecular repair hair oil leave buildup or weigh down my hair?

No, it will not leave buildup or weigh down your hair. This weightless oil is powered by intentional ingredients to reduce frizz-causing damage on the molecular level inside the hair fiber, while natural oils work on the surface of hair without weighing it down.

Plus, you don’t need much of this highly concentrated formula to see results, just use 1-3 drops and build as needed. If you’re concerned about buildup, use our detox shampoo to remove 99% of product buildup after just 1 wash*.


*Disclaimers

Will the mask block the molecular repair hair oil from penetrating?

No, the mask will not block the molecular repair hair oil from penetrating. The mask is a highly concentrated treatment without any fillers so it won’t block the oil from
penetrating. Like layering different skincare products, the oil can be layered on top of the mask without impacting its performance.

Can I mix the oil and mask together?

Instead of mixing the oil and mask together, get the most effective repair and styling benefits by using the mask first, waiting 4 minutes, and then applying the oil.

immediate + lasting frizz control

Boost shine and seal split ends on all hair types—weightlessly.

before afer
before
after
"I normally don't use hair oils as my hair gets naturally oily....I loved the end result! I will officially be adding this hair oil to my routine"
- Fabiola N.
before afer
before
after
"I use this alllll the time. It's truly saved my hair....And it's so gorgeous and shiny and the thickness is returning nicely."
- Emma L.
before afer
before
after
"It makes my hair much smoother after it’s been so damaged."
- Crystal A.
before afer
before
after
"So far so good, used it around 4 times and my hair looks shinier and has less frizz"
- Anel
clinically proven smoothness
24
hour frizz control*
104%
more shine*
78%
reduction in split ends*
450
degree heat protection*
how to use molecular repair oil

Highly concentrated formula. Start with 1-3 drops and build as needed.
1. Apply 1-3 drops to towel-dried hair from mid-lengths to ends.
2. For strengthening benefits from the K18PEPTIDE™, wait 4 minutes before styling.
3. Apply 1-3 drops to dry hair as a finisher.

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feel what's possible with K18

See how K18 unlocks our community's expression

4.8
Rated 4.8 out of 5 stars
Based on 1,010 reviews
97%would recommend these products
Reviews Summary
Customers say this hair oil is lightweight and doesn't leave hair greasy or weighed down. They find it effective for controlling frizz and adding shine, with many noting that just a few drops go a long way. Users report their hair feels softer, smoother, and more manageable after use. Many mention it helps with damaged or dry hair, making it appear shinier and stronger. The oil absorbs easily and works well for various hair types, including fine, thick, curly, and bleached hair. Some customers appreciate that it doesn't have a strong scent and pairs well with other styling products. A few users found it made their hair look drier or weren't impressed with the results, and several mention the high price point as a concern despite the product's effectiveness.
Customers Talked About
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1,010 reviews
  • meredith c.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil 30 mL
    I recommend this product
    Age 55 - 64
    Hair Concern Chemical damage, Heat damage, Color-care, Frizz, Fragile/brittle hair
    Hair Type Thick/Coarse, Curly/Coily, Grey Hair
    My Results Less Frizz, Visible Difference, Stronger Hair, Less Breakage, Defined Curl/Wave Pattern
    Rated 5 out of 5 stars
    4 days ago
    Made all the difference

    I really love it. My hair likes to be really big and really wild and this stuff tames it while allowing me to airdrop and not use hot tools.. It also really nourishes my hair, along with the mask. My hair feels good for the first time in a long time. That said I use wayyyy more than the recommended amount, tho I have long, curly color-treated hair so I feel it needs it and my hair drinks it up.

    I do wish it came in a better bottle bc inevitably I spill it and it is not cheap at all.

    Was this helpful?
    KU Profile picture for K18Hair UK
    K18Hair UK
    4 days ago

    We're so thrilled the Molecular Repair Hair Oil is making such a difference for you! 💕 Your hair sounds absolutely happy, and we love that it's working beautifully with your routine! ✨

  • Jonette J.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil 30 mL
    I recommend this product
    Age 35 - 44
    Hair Concern Fragile/brittle hair, Dryness, Extending time between washes
    Hair Type Fine/Thin
    My Results Stronger Hair, Smoother Hair, Shinier Hair, Soft Touchable Hair, Visible Difference
    Rated 5 out of 5 stars
    4 days ago
    Blow dried Type 4 Natural

    I am a “straight natural” with fine, medium density hair that I wash every 1-2 weeks. For the most part I alternate between mini twists and stretched hair; K18 is a core part of my wash day routine because of its lightweight heat protection and I must say the Molecular Repair Oil is my absolute fave (next to the shampoo/conditioner). I can definitely feel the difference between when I use it and when I don’t use it before blow drying; my cuticles are so much smoother and shinier after applying. When I ran out of the small size, I made it my business to purchase the larger one so I can make sure I’m not without it again. #journeytowaistlength

    Was this helpful?
    KU Profile picture for K18Hair UK
    K18Hair UK
    4 days ago

    We love this so much! 💕 So happy the Molecular Repair Oil has become such an essential part of your routine and we're cheering you on with your hair journey! ✨

  • Kirsty R.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil 30 mL
    I recommend this product
    Rated 5 out of 5 stars
    4 days ago
    K18 repair hoar oil

    This product is amazing! Makes my hair so soft. Normally really frizzy on end but this makes it nice and smooth. Definitely would recommend.

    Was this helpful?
    KU Profile picture for K18Hair UK
    K18Hair UK
    4 days ago

    Thank you so much Kirsty! We're thrilled to hear the Molecular Repair Hair Oil has made such a difference for your hair. We love that it's helping tame that frizz and keep your ends smooth and soft!

  • Maree R.
    Verified Buyer
    Reviewing
    hair oil deluxe sample
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    Love love love

    Wonderful hair oil that isn’t greasy or heavy. Leaves your hair soft and silky

    Was this helpful?
    KU Profile picture for K18Hair UK
    K18Hair UK
    2 months ago

    Thank you for your amazing review, Maree! 💛 We're absolutely thrilled to hear you love the Hair Oil Deluxe Sample! It's wonderful that you're experiencing that perfect balance - all the nourishment and softness without any of the greasiness or heaviness. That silky, soft finish is exactly what we aim for with our hair oil. Thank you for choosing K18 and for sharing your experience with us!

  • Donna F.
    Verified Buyer
    Reviewing
    hair oil deluxe sample
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    Hair oil

    This hair oil is absolutely amazing.

    Was this helpful?
    KU Profile picture for K18Hair UK
    K18Hair UK
    2 months ago

    Thank you for your amazing review, Donna! We're absolutely thrilled to hear that you think the Hair Oil Deluxe Sample is amazing! There's nothing better than finding a product that delivers those incredible results. We're so happy the sample gave you a chance to experience the transformative power of K18 hair oil. Thank you for choosing K18 and for sharing your experience with us! ✨

*Disclaimers

10