Search  for anything...
K18

K18 Molecular Repair Hair Oil, Weightless Oil for Stronger, Healthier Hair, Suitable For All Hair Types

  • Based on 1,204 reviews
Condition: New
Checking for the best price...

Buy Now, Pay Later


As low as $6 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: Only 7 left in stock, order soon!
Fulfilled by Amazon

Arrives Saturday, Dec 13
Order within 49 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Size: 0.34 Fl Oz (Pack of 1)


Product Benefits: Our K18PEPTIDE™ repairs hair at a molecular level across multiple types of bonds, restoring hair health for all See more


Hair Type: All


Scent: Unscented


Liquid Volume: 10 Milliliters


Item Form: Oil


Product Dimensions ‏ : ‎ 0.15 x 1.5 x 4 inches; 1.13 ounces


UPC ‏ :


Manufacturer ‏ : ‎ K18


Country of Origin ‏ : ‎ USA


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Dec 13

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Great product for fine hair
Size: 0.34 Fl Oz (Pack of 1)
I have fine thin hair and this works great. I use 2-3 drops and leaves my hair shiny and soft without feeling or looking oily
Reviewed in the United States on January 29, 2025 by steve kosel

  • Its magic
Size: 0.34 Fl Oz (Pack of 1)
I am shook with this product, I just ordered it and used it for the first time. And already saw a hugeee chance my hair is so soft and silky. This product it’s literally magic. If you have the chance to get this product do it. A little goes a long way😍😍😍😍
Reviewed in the United States on January 18, 2025 by Jennifer Sánchez

  • It works perfectly
Size: 1 Fl Oz (Pack of 1)
This product, with K18 Leave-In Molecular Hair Mask, Repairs Dry or Damaged Hair, Reverse Hair Damage from Bleach, Color, Chemical Services & Heat, helped me get my wavy hair looking and feeling soft after being extremely dry due to colouring with a non chemical hair colour product. It took several weeks but considering how my hair was, it was magic. Plus, I have no problem with my sensitive scalp. ... show more
Reviewed in the United States on February 23, 2025 by AMIH

  • Works so well
Size: 1 Fl Oz (Pack of 1)
Love it - hair became healthier!
Reviewed in the United States on January 18, 2025 by Mayya Perova

  • LOVE
Size: 0.34 Fl Oz (Pack of 1)
I have always hated Olaplex after I found k18. super expensive but definitely worth it. I took a star away only because of how small this $30 bottle is. Very tiny
Reviewed in the United States on January 27, 2025 by chloe

  • Overpriced and useless
Size: 0.34 Fl Oz (Pack of 1)
The suggested amount of 1-3 drops is ridiculous, especially if you have long or damaged hair. The droplet is tiny so 3 drops just disappears into the skin of your palms. Instead, I squeeze out all that’s in the droplet for each use, and even at that, I feel nothing. My hair doesn’t feel any different, and there’s still breakage. I have long hair and have been bleaching and coloring for the past 3 years, so I thought my hair type is ideal to test a product like this. Waste of money and full of pretentious false claims. ... show more
Reviewed in the United States on November 5, 2024 by Isabella

  • Buy the big bottle!
Size: 0.34 Fl Oz (Pack of 1)
Bought this after a recommendation from my hair stylist. It’s incredible. Buy the big bottle!
Reviewed in the United States on February 1, 2025 by Stephanie Bradfish

  • Hair product
Size: 0.34 Fl Oz (Pack of 1)
Works okay
Reviewed in the United States on January 1, 2025 by Amazon Customer

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...