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Molecular Repair Hair Oil
Regular price $65
Regular price $0 Sale price $65
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
1,048 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?

still have questions? visit our help center

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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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.
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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.

learn more on our blog
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FUNdamentals 33: What’s in our molecular repair hair oil?
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FUNdamentals 32: How do I use the molecular repair hair oil?
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FUNdamentals 32: How do I use the molecular repair hair oil?
You know what's FUN-damental? When your product works. We'll be breaking down...
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
about The definitive guide to drying your hair
The science of hair drying
/ hair science
The science of hair drying
Aka why wet hair needs special care.
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 1,048 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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1,048 reviews
  • laura h.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 35 - 44
    Hair Concern Chemical damage
    Hair Type Grey Hair, Thick/Coarse
    My Results Shinier Hair, Visible Difference
    Rated 5 out of 5 stars
    1 hour ago
    I love it

    It moisturizes me, removes all the frizz, my hair looks nourished and shiny

    Translated from Spanish
    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    4 minutes ago

    We love reading this! 💗 We're so happy that Molecular Repair Hair Oil is giving you that shine and nutrition you're looking for. Thank you for making K18 part of your routine!

    ✨
  • Cathy R.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 55 - 64
    Hair Concern Extending time between washes, Frizz, Color-care, Split-Ends
    Hair Type Curly/Coily, Medium Density, Thick/Coarse, Straight/Wavy
    My Results Less Frizz, Smoother Hair, Soft Touchable Hair, Bouncy Hair, Visible Difference
    Rated 5 out of 5 stars
    6 hours ago
    No Build Up!

    I’ve been using K18 Molecular Repair Hair Oil for about six months, and I absolutely love it! My hair looks and feels noticeably healthier, softer, and smoother. It gives my hair a beautiful shine without making it feel heavy or greasy, and I love how manageable my hair feels after using it. After consistently using it for several months, I can honestly say it has become one of my favorite hair products. A little goes a long way, too. Definitely a product I’ll continue to use!

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    5 hours ago

    We love hearing this, Cathy! 💗 We're so thrilled the Molecular Repair Hair Oil has become a staple in your routine and that you're loving the results. Thank you for making K18 part of your hair care! ✨

  • Mary B.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 65+
    Hair Concern Heat damage, Frizz, Split-Ends, Color-care, Dryness
    Hair Type Curly/Coily, Thick/Coarse
    My Results Smoother Hair, Shinier Hair, Soft Touchable Hair, Less Breakage, Less Frizz
    Rated 5 out of 5 stars
    Yesterday
    Another great product!

    The k18 line continues to add great working products.

    I add the oil to my ends and mid hair after straightening and it adds such sheen!

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    Yesterday

    We love hearing this! 💗 We're so glad the Molecular Repair Hair Oil is adding beautiful sheen to your hair. Thank you for continuing to love the K18 line! ✨

  • Judy D.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 55 - 64
    Hair Concern Dryness
    Hair Type Fine/Thin, Grey Hair
    My Results Visible Difference, Stronger Hair, Less Breakage, Shinier Hair, Oil absorbed
    Rated 5 out of 5 stars
    2 days ago
    Ms.

    Great product hair feels fuller

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

    Thank you so much for the love! 💙 We're thrilled to hear you're loving the Molecular Repair Hair Oil and that your hair feels fuller! ✨

  • Julie N.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 45 - 54
    Hair Concern Chemical damage, Heat damage, Fragile/brittle hair, Split-Ends, Dryness
    Hair Type Straight/Wavy
    My Results Visible Difference, Less Breakage, Stronger Hair
    Rated 5 out of 5 stars
    5 days ago
    Hair oil that works!

    This hair oil has helped my hair tremendously! It only takes a little product and isn’t sticky nor heavy.

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

    Thank you so much for the 5-star review, Julie! We're thrilled to hear our Molecular Repair Hair Oil is delivering amazing results for you. 💙 We appreciate your support! ✨

*Disclaimers

10