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Coco & EveHair Repairing Leave-In Treatment

Instead of K18 Leave-In Hair Mask, $75Leave-in hair treatment

$34

Size 50 ml, $20.11 / fl oz

Sold by Coco & Eve US. Amazon's shipping and returns apply.

Amazon price as of Oct 12, 2026, 8:37 PM ET, subject to change: the price on Amazon at checkout is the one that applies. We may earn a commission; the price you pay is the same.

K18 Leave-In Molecular Repair Hair Mask

The luxury original: K18 Leave-In Molecular Repair Hair Mask, $75

What matches: The same repair peptide: sh-oligopeptide-78, which K18 sells as K18Peptide, is fourth on Coco & Eve's list, and both carry hydrolyzed wheat protein and wheat starch in a cetearyl alcohol and behentrimonium chloride leave-in worked through damp hair and left four to five minutes before styling.

What it does worse: K18 is a lighter fluid with denatured alcohol and dicaprylyl ether, while Coco & Eve adds glycerin, arginine, itaconic acid, panthenol, flax and chia extracts and hyaluronic acid.

See the full comparison

About the product

What it is: Leave-in repair treatment for heat- and color-damaged hair: sh-oligopeptide-78 with arginine, itaconic acid, panthenol, flax and chia extracts, hyaluronic acid and coconut water. 1.69 oz.

Highlighted Ingredients:

  • sh-Oligopeptide-78
  • Hydrolyzed wheat protein
  • Itaconic acid
  • Panthenol

What Else You Need to Know:

  • Intensive hair repair treatment: Get stronger, smoother hair w/ our leave-in treatment formula, shown to help repair damage in just 3 minutes. Scientifically formulated to deeply restore damaged locks
  • Targets heat & styling damage: Amino acids, vitamin B5, and flaxseed/chia polysaccharides create a potent repair mechanism for frizzy damaged hair, improving manageability and reducing future breakage
  • Biomimetic ceramide complex: A ceramide-like molecule offers intense hair-restructuring and shine-boosting benefits, repairing the hair's surface and helping prevent further breakage and split ends
  • For all hair types: Straight, curls, dry, fine, thick, or thin hair, we got your back! Use our conditioning leave-in treatment for men and women to target damage caused by color, heat, and styling
  • Suggested leave-in use: After shampooing (skip conditioner), towel-dry hair until damp. Apply 1+ pumps based on length/thickness, working from ends to roots. Let sit 5 min, don't rinse. Style as usual

From the Amazon listing.

What is Coco & Eve Hair Repairing Leave-In a dupe for?

K18 Leave-In Molecular Repair Hair Mask ($75), at about 55% less per ounce.

Hair dupe guides

Alternatives

The luxury original, and other products that do the same job

$34

$20.11 / fl oz