
Premium listing verified: Sold by K18 Hair and shipped from Amazon on the listing, with a Premium Brand Sourced badge and Visit the K18 Store context as printed; manufacturer K18, item model K18-31005.
K18 Leave-In Molecular Repair Hair Mask
The leave in exception: a peptide treatment the brand publishes under molecular repair naming, used in place of conditioner, never rinsed out.
K18 changes the category rather than winning it on richness: a leave in peptide cream, published under the brand's own molecular repair naming, that replaces conditioner and takes four minutes with no rinse. For bleached, coloured or heat styled hair that looks and feels damaged, nothing else here works this way, and the listing is sold by K18 Hair itself.
The specification
- Size
- 50 ml / 1.7 fl oz
- Format
- Leave in cream, pump bottle
- Key Ingredients
- K18PEPTIDE (sh-Oligopeptide-78), hydrolyzed wheat protein, tocopherol
- Use
- After shampoo only, towel dry, 1 to 3 pumps, wait 4 minutes, do not rinse, as directed on the listing
- Hair Type
- All hair types, as printed on the listing
Strengths
- The patented K18PEPTIDE, printed in the ingredient list as sh-Oligopeptide-78, is the brand's own published technology and the entire basis of the product naming
- The protocol replaces conditioner entirely on wash days: shampoo, skip conditioner, towel dry, apply one to three pumps, wait four minutes, do not rinse
- At one to three pumps per use the small 50 ml bottle is dosed sparingly, and the brand prints about 16 to 50 treatments per bottle on the carton
Limitations
- It is not a moisture mask in the creamy sense, so very dry hair may still want a hydrating product on other wash days
- Using too much is the most common mistake the brand itself warns about, and the directions stress that less is more
- The formula contains alcohol denat. high in its published list, which the brand explains as part of its delivery system, but ingredient cautious buyers should read that list first
What owners report
In praise
- Hair feeling softer, stronger and bouncier after colour or bleach appointments, in the brand's own framing of the result
- The speed of the routine, four minutes with no rinse and no conditioner step
- A little product going a long way once the pump dosing is learned
With reservations
- The small bottle and prestige tier are the standing hesitation
- Owners who apply it over conditioner, against the directions, often report muted results
- Fine hair owners sometimes find even two pumps more than their hair wants
Suits
Bleached, coloured, chemically serviced or heat styled hair that looks and feels damaged, and anyone who wants a treatment step that takes four minutes and no rinsing.
Skip if
Your hair mainly feels dry rather than damaged, or you enjoy a rich, creamy mask ritual. This is a light leave in cream dosed in pumps, and a moisture led jar such as the Moroccanoil mask will suit a pure dryness brief better.







