K18 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.
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.
Boost shine and seal split ends on all hair types—weightlessly.
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.
See how K18 unlocks our community's expression
- Frizz Control
- Shine
- Texture
- Weight
- Hair Health
- meredith c.Verified BuyerReviewingMolecular Repair Hair OilI recommend this productAge 55 - 64Hair Concern Chemical damage, Heat damage, Color-care, Frizz, Fragile/brittle hairHair Type Thick/Coarse, Curly/Coily, Grey HairMy Results Less Frizz, Visible Difference, Stronger Hair, Less Breakage, Defined Curl/Wave PatternRated 5 out of 5 stars8 hours agoMade 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.
KK18Hair7 hours agoWe'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 BuyerReviewingMolecular Repair Hair OilI recommend this productAge 35 - 44Hair Concern Fragile/brittle hair, Dryness, Extending time between washesHair Type Fine/ThinMy Results Stronger Hair, Smoother Hair, Shinier Hair, Soft Touchable Hair, Visible DifferenceRated 5 out of 5 stars17 hours agoBlow 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
KK18Hair16 hours agoWe 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! ✨
- Julie W.Verified BuyerReviewingMolecular Repair Hair OilI recommend this productAge 65+Hair Concern Frizz, DrynessHair Type Grey HairMy Results Less Frizz, Smoother HairRated 4 out of 5 stars6 days agoI need this oil
After my K18 hair mask, I add 4-5 drops ( not droppers) to my ends - helps with my frizz.
KK18Hair6 days agoThank you for your review, Julie! We're so glad the Molecular Repair Hair Oil is working beautifully with your K18 routine to help with frizz. We appreciate you being part of the K18 community! 💕
- 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 stars1 week agoAwesome
Makes my hair feel so soft and great for fly aways and slick back looks
KK18Hair1 week 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! 🤍
- EmilyReviewingMini molecular repair hair oilI recommend this productRated 5 out of 5 stars1 week ago5 Stars
Favorite hair oil now