molecular repair hair oil
Weightless oil that strengthens, repairs damage + reduces frizz
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
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*
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)
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
For Stylist Use
Apply the PRO molecular repair hair mist: 1. Apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, and level of damage. 2. Wait 4 minutes (do not rinse out). If needed, dry the hair prior to applying lightener or color. Then perform your desired technique.
Apply the PRO molecular repair hair mask: 1. Shampoo (do not condition) and towel dry thoroughly. 2. Apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, starting at the ends and working up towards the roots. 3. Let sit for 4 minutes (do not rinse out).
Finish with the molecular repair hair oil 1. Apply 1-3 drops of K18 molecular repair hair oil to damp hair, starting at the ends and working upward through the mid-lengths. 2. Wait 4 minutes. Style as usual. 3. Apply an additional 1-3 drops of K18 molecular repair hair oil to dry hair as a finisher.
**For best results, lightly dampen hair with water (do not saturate) before applying K18 PRO mist.
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.
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.


still have questions? visit our help center
Does the molecular repair hair oil work on all hair types?
Yes, the molecular repair hair oil works on all hair types.
Does the molecular repair hair oil provide heat protection?
Yes, this oil provides heat protection up to 450°F/232°C.
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 that would block the oil from
penetrating. Like layering different skincare products, the oil can be layered on top of the mask without impacting its performance.
Will the molecular repair hair oil leave buildup or weigh down hair?
No, it will not leave buildup or weigh down 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 or your clients are concerned about buildup, use our detox shampoo to remove 99% of product buildup after just 1 wash*.
*Disclaimers
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.
Boost shine and seal split ends on all hair types—weightlessly.
2. Apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, or level of damage.
3. Wait 4 minutes (do not rinse out).
4. If needed, dry the hair prior to applying lightener or color. Then perform your desired technique.
5. Process your lightener or color as usual, then rinse and shampoo with K18 PEPTIDE PREP™ detox shampoo. Do not condition.
6. Apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, starting at the ends and working up towards the roots.
7. Wait 4 minutes (do not rinse), then apply 1-3 drops of K18 molecular repair hair oil to mid-lengths and ends.
8. Wait 4 minutes, then proceed with cut or style as usual.
9. Add an additional 1-3 drops of K18 molecular repair hair oil to dry hair as a finisher.
Please see the “K18 + toning or glossing” section for more information on toning with K18.
2. Apply a minimum of 10 full sprays of K18 professional molecular repair hair mist per quadrant, increasing up to 20 sprays as needed, depending on client’s length, density, or level of damage.
3. Wait 4 minutes (do not rinse), then apply toner or gloss.
4. Process toner or gloss as usual, then rinse. If shampooing, follow with K18 PEPTIDE PREP™ pH maintenance shampoo. Do not condition.
5. Towel dry hair, then apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, starting at the ends and working up towards the roots.
6. Wait 4 minutes, then apply 1-3 drops of K18 molecular repair hair oil to mid-lengths and ends.
7. Wait 4 minutes, then proceed with cut or style as usual.
8. Add an additional 1-3 drops of K18 molecular repair hair oil to dry hair as a finisher.
2. Towel dry hair, section hair into 4 quadrants, then apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, or level of damage.
3. Wait 4 minutes (do not rinse), then wrap, process, and neutralize perm as usual.
4. Once perm is complete, remove rods and gently towel dry.
5. Apply a minimum of 10 full sprays of K18 professional molecular repair hair mist per quadrant, increasing up to 20 sprays as needed, depending on client’s length, density, or level of damage.
6. Wait 4 minutes (do not rinse), then proceed with cut or style as usual.
To avoid weighing down fresh curls, it is not recommended to use the K18 professional molecular repair hair mask or oil immediately after completing a perm service.
2. Apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, or level of damage.
3. Wait 4 minutes (do not rinse out) and if needed, dry the hair prior to beginning relaxer application.
4. Apply + process relaxer as usual, then rinse thoroughly.
5. Towel dry hair, then re-apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, and level of damage.
6. Wait 4 minutes (do not rinse), then follow with neutralizing shampoo. Do not condition.
7. Towel dry thoroughly, then re-apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, starting at the ends and working up towards the roots.
8. Wait 4 minutes (do not rinse), then apply 1-3 drops of K18 DAMAGE SHIELD protective conditioner from mid-lengths to ends. Build as needed.
9. Rinse thoroughly, then towel dry hair and apply 1-3 drops of K18 molecular repair hair oil to mid-lengths and ends.
10. Wait 4 minutes, then proceed with cut or style as usual.
11. Add an additional 1-3 drops of K18 molecular repair hair oil to dry hair as a finisher.
2. Towel dry hair, then apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, or level of damage.
3. Wait 4 minutes, then apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, starting at the ends and working up towards the roots.
4. Wait 4 minutes, then apply 1-3 drops of K18 molecular repair hair oil to mid-lengths and ends.
5. Wait 4 minutes, then style as usual.
6. Add an additional 1-3 drops of K18 molecular repair hair oil to dry hair as a finisher.
2. Apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, or level of damage.
3. Wait 4 minutes (do not rinse out). Then follow with the recommended shampoo per your keratin straightener service instructions.
4. Apply and process keratin straightener as usual.
5. Apply 1-3 drops of K18 molecular repair hair oil to mid-lengths and ends on dry hair as a finisher.
Wait 3-4 shampoos post-treatment before using the K18 molecular repair hair mask in the salon or at home.
1. Section dry hair into 4 quadrants.
2. Apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, or level of damage.
3. Wait 4 minutes, then rinse and shampoo with K18 PEPTIDE PREP™ detox shampoo (do not condition)
4. Towel dry hair, then apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, only to the ends and mid-lengths (avoiding the root).
5. Wait 4 minutes (do not rinse), then proceed with extension installation as usual.
Using K18 on extensions alone or on clients with previously installed extensions:
K18 is suitable for use on all human hair extensions (to include tape-in, k-tip, hand tied, clip-in, sew-in, etc.). For information on using K18 on clients with previously installed extensions, please follow the instructions for the specific service being performed.
PRO tip: When working on clients with tape-in extensions, we recommend following the standard protocol for cream-based conditioner or oil usage. For best results, do not apply the K18 professional molecular repair hair mask or molecular repair hair oil directly to the weft adhesive or to the natural hair immediately surrounding the adhesive as it could cause slippage.
See how K18 unlocks our community's expression
- Frizz Control
- Shine
- Texture
- Weight
- Usage
- Tara C.Verified BuyerReviewingmini molecular repair hair oilI recommend this productAge 35 - 44Hair Concern Extending time between washesHair Type Fine/ThinMy Results Visible Difference, Shinier HairRated 5 out of 5 stars3 weeks agoAmazing product
I have fine hair that isn’t damaged, but needs a little sparkle when it’s finished. This product does just that, without weighing it down or making it look greasy. Just a little on the finished ends and I’m out the door!
Was this helpful?K18Hair PRO3 weeks agoThank you so much for the amazing 5-star review! 💗 We're thrilled to hear that our Mini Molecular Repair Hair Oil is giving your fine hair that perfect sparkle without any weight or greasiness. It's so great to know you've found the ideal finishing touch! ✨
- Kelly C.Verified BuyerReviewingmini molecular repair hair oilI recommend this productAge 18 - 24Hair Concern Chemical damage, Fragile/brittle hair, DrynessHair Type Curly/Coily, Medium DensityMy Results Defined Curl/Wave Pattern, Smoother HairRated 4 out of 5 stars1 month agoGood for damaged hair
My hair is very chemically damaged, I’ve noticed since using this product that my hair is curling better than it was before and is softer too.
Was this helpful?K18Hair PRO1 month agoThank you so much for the love! 💙 We're thrilled to hear the Mini Molecular Repair Hair Oil is helping your curls and leaving your hair softer. We're so happy it's making a difference! ✨
- teresa f.Verified BuyerReviewingmini molecular repair hair oilI recommend this productAge 45 - 54Hair Concern Color-care, Heat damage, Extending time between washes, Fragile/brittle hair, Chemical damageHair Type Medium DensityMy Results Stronger HairRated 5 out of 5 stars1 month agoWay to go!!
Nice consistency. Permeates the hair not just coats it
Was this helpful?K18Hair PRO1 month agoThank you so much for the love! 💙 We're thrilled to hear you're loving how the Mini Molecular Repair Hair Oil permeates your hair! ✨
- karla v.Verified BuyerReviewingmini molecular repair hair oilI recommend this productAge 45 - 54Hair Concern Fragile/brittle hairHair Type Medium DensityMy Results Smoother Hair, Less BreakageRated 5 out of 5 stars1 month agoHydrated
I use this a few times a week and my hair is shiny smooth,and not weighed down like most serums
Was this helpful?K18Hair PRO1 month agoThank 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! ✨
- Marysa W.Verified BuyerReviewingmini molecular repair hair oilI recommend this productAge 25 - 34Hair Concern Chemical damage, Heat damage, DrynessHair Type Medium DensityMy Results Visible Difference, Smoother Hair, Shinier Hair, Cleaner, fresher hairRated 5 out of 5 stars2 months agoAwesome
Makes my hair feel so soft and great for fly aways and slick back looks
Was this helpful?K18Hair PRO2 months agoThank you so much for your review, Marysa! We're thrilled the Mini Molecular Repair Hair Oil is giving you that soft feel and working great for your styling needs. We appreciate you being part of the K18 community! 🤍




