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molecular repair hair oil
one use of molecular repair hair oil delivers: clinically proven damage repair, 24-hr frizz control, 104% more shine, 78% reduction in split ends, and 450F heat protection
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
one use of molecular repair hair oil delivers: clinically proven damage repair, 24-hr frizz control, 104% more shine, 78% reduction in split ends, and 450F heat protection
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
1,035 Reviews

K18 molecular repair hair oil

Weightless oil that strengthens, repairs damage + reduces frizz

Size:
30mL
Regular price $65
Regular price $0 Sale price $65
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Color:
30mL

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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, Linalyl Acetate, Pinene, Rose Ketones, Terpineol, Tetramethyl Acetyloctahydronaphthalenes.

pairs well with
FutureIQ™ biomimetic hair longevity serum
full-size leave-in molecular repair hair mask
Press + and − keys to zoom, arrow keys to pan.
molecular repair hair oil
one use of molecular repair hair oil delivers: clinically proven damage repair, 24-hr frizz control, 104% more shine, 78% reduction in split ends, and 450F heat protection
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
one use of molecular repair hair oil delivers: clinically proven damage repair, 24-hr frizz control, 104% more shine, 78% reduction in split ends, and 450F heat protection
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.

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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.
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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
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after
"It makes my hair much smoother after it’s been so damaged."
- Crystal A.
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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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FUNdamentals 32: How do I use the molecular repair hair oil?
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The definitive guide to drying your hair
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The definitive guide to drying your hair
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about The science of hair drying
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See how K18 unlocks our community's expression

4.8
Rated 4.8 out of 5 stars
Based on 1,035 reviews
95%would recommend these products
Reviews Summary
Customers say this hair oil delivers exceptional results with just a few drops. Many reviews highlight its lightweight formula that works well for both fine and thick hair types. The oil effectively tames frizz and flyaways while adding softness and shine without feeling greasy. Users particularly appreciate how it smooths dry ends and works well on various hair textures. While most find it highly effective, some mention the scent is noticeable and a few note the price point is high. Common feedback emphasizes that a small amount goes a long way, making the product last longer than expected.
Customers Talked About
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1,035 reviews
  • teresa f.
    Verified Buyer
    Reviewing
    Mini molecular repair hair oil
    I recommend this product
    Age 45 - 54
    Hair Concern Color-care, Heat damage, Extending time between washes, Fragile/brittle hair, Chemical damage
    Hair Type Medium Density
    My Results Stronger Hair
    Rated 5 out of 5 stars
    1 hour ago
    Way to go!!

    Nice consistency. Permeates the hair not just coats it

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    13 minutes ago

    Thank you so much for the love! 💙 We're thrilled to hear you're loving how the Mini Molecular Repair Hair Oil permeates your hair! ✨

  • Lauren J.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 35 - 44
    Hair Concern Frizz, Chemical damage, Dryness, Heat damage
    Hair Type Thick/Coarse
    My Results Less Frizz, Visible Difference, Stronger Hair, Less Breakage, Smoother Hair
    Rated 5 out of 5 stars
    2 days ago
    Second bottle

    I have kept this as part of my routine since I went blonde and my stylist recommended it. The bottle lasts me a long time and I have thick long hair. I love how it helps the frizz, gives a sleek look without looking oily and also provides heat protection.

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    2 days ago

    Thank you so much for the love! 💙 We're thrilled you're on your second bottle of the Molecular Repair Hair Oil and that it's become such a staple in your routine! ✨

  • karla v.
    Verified Buyer
    Reviewing
    Mini molecular repair hair oil
    I recommend this product
    Age 45 - 54
    Hair Concern Fragile/brittle hair
    Hair Type Medium Density
    My Results Smoother Hair, Less Breakage
    Rated 5 out of 5 stars
    2 days ago
    Hydrated

    I use this a few times a week and my hair is shiny smooth,and not weighed down like most serums

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    2 days ago

    Thank you so much for the love! 💙 We're thrilled to hear the Mini Molecular Repair Hair Oil is leaving your hair shiny and smooth without that heavy feeling! ✨

  • Rhonda R.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 65+
    Hair Concern Chemical damage, Fragile/brittle hair
    Hair Type Fine/Thin
    My Results Visible Difference, Soft Touchable Hair, Shinier Hair
    Rated 5 out of 5 stars
    1 week ago
    Great product!

    This won't leave your hair feeling greasy. Last a long time because I only use 2 drops!

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    1 week ago

    Thank you so much for the love! 💙 We're thrilled to hear the Molecular Repair Hair Oil is working beautifully for you, and that just a couple drops are delivering amazing results! ✨

  • Samantha B.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 35 - 44
    Hair Concern Heat damage, Split-Ends
    Hair Type Fine/Thin, Straight/Wavy
    My Results Less Frizz, Less Breakage, Smoother Hair
    Rated 5 out of 5 stars
    1 week ago
    Good Product

    I use this on my damp hair prior to blow drying. I concentrate on my ends and do feel like it helps strengthen. Purchased sr least 3x and lasts a long time.

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    1 week ago

    Thank you so much for the love! 💙 We're thrilled to hear you're loving the Molecular Repair Hair Oil and that it's become such a staple in your routine! ✨

*Disclaimers

10