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Molecular Repair Hair Oil 30 mL
Regular price £65
Regular price £0 Sale price £65
molecular repair hair oil
Molecular Repair Hair Oil 30 mL
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
molecular repair hair oil formula
Mini versus full size product comparison
K18 routine guide
molecular repair hair oil
Molecular Repair Hair Oil 30 mL
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
molecular repair hair oil formula
Mini versus full size product comparison
K18 routine guide
4.8
Rated 4.8 out of 5 stars
982 Reviews

Molecular repair hair oil

Weightless oil that strengthens, repairs damage + reduces frizz

Size:
30 mL
Regular price £65
Regular price £0 Sale price £65
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Color:
30 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
AstroLift™ reparative volume spray
Press + and − keys to zoom, arrow keys to pan.
molecular repair hair oil
Molecular Repair Hair Oil 30 mL
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
molecular repair hair oil formula
Mini versus full size product comparison
K18 routine guide
molecular repair hair oil
Molecular Repair Hair Oil 30 mL
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
molecular repair hair oil formula
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.

learn more on our blog
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FUNdamentals 32: How do I use the molecular repair hair oil?
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about FUNdamentals 32: How do I use the molecular repair hair oil?
The definitive guide to drying your hair
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The definitive guide to drying your hair
Tips, tricks, and common misconceptions
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/ hair science
The science of hair drying
Aka why wet hair needs special care.
about The science of hair drying
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 982 reviews
96%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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982 reviews
  • Maree R.
    Verified Buyer
    Reviewing
    hair oil deluxe sample
    I recommend this product
    Rated 5 out of 5 stars
    1 month 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
    4 weeks 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
    1 month ago
    Hair oil

    This hair oil is absolutely amazing.

    Was this helpful?
    KU Profile picture for K18Hair UK
    K18Hair UK
    1 month 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! ✨

  • Gultakin H.
    Verified Buyer
    Reviewing
    hair oil deluxe sample
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    K18

    I have already applied twice on my hair. It looks useful so far, I am satisfied.

    Was this helpful?
    KU Profile picture for K18Hair UK
    K18Hair UK
    1 month ago

    Thank you so much, Gultakin! We're so happy to hear you're already seeing great results with the Hair Oil Deluxe Sample after just two applications ✨ It's wonderful that you're satisfied with how it's working for your hair!

  • Tracy H.
    Verified Buyer
    Reviewing
    hair oil deluxe sample
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    Amazing oil

    Only had the sample bottle but amazing oil

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

    Thank you so much for this amazing review, Tracy! We're absolutely thrilled to hear that you love the hair oil deluxe sample! It's wonderful that even just the sample bottle made such a fantastic impression - that's exactly what we love to hear about our concentrated formulas! We're so excited that you're loving the results and thanks for your incredible 5-star review! 💛

  • Miss S. b. B.
    Verified Buyer
    Reviewing
    hair oil sample
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    Fabulous

    Great product deep repair and will be back soon

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

    Thank you so much for this fabulous review, Miss! We're absolutely thrilled to hear that you love the hair oil sample and that you're experiencing the deep repair benefits! It's wonderful that it's made such a great impression and that you'll be back soon - that's exactly what we love to hear! We're so excited that you're loving the results and thanks for your amazing 5-star review! 💛

*Disclaimers

10