K18 - Hair Repair Mask 50ML

The K18 Hair Repair Mask 50 ml is a leave-in hair mask by K18, the largest of the three sizes we sell. Leave-in means you don't rinse the mask out after applying it. Its full name is the K18 Leave-In Molecular Repair Hair Mask. This 50 ml size is meant for regular, ongoing use in your hair routine.

The active ingredient is sh-Oligopeptide-78, which the brand calls K18PEPTIDE™. Peptides are short chains of amino acids, the building blocks of keratin. Keratin makes up most of the hair shaft, the part of the hair you see outside the scalp. K18 states that this peptide repairs disulfide bridges in keratin, bonds between sulphur atoms that can break from heat, bleaching or colouring.

Who is the K18 Hair Repair Mask 50 ml for?

The K18 Hair Repair Mask 50 ml suits all hair types, from straight to curly. This leave-in mask is aimed especially at hair that's regularly coloured, bleached or heat-styled. Because the 50 ml is the largest bottle, it suits regular, ongoing use in your routine.

How do you use the K18 Hair Repair Mask 50 ml?

You apply the K18 Hair Repair Mask 50 ml to towel-dried hair after washing, without conditioner. Use 1 to 3 pumps, depending on length and thickness, and spread the mask from the ends upward. After 4 minutes the mask has done its work, so there's no need to rinse it out; it simply remains in your hair. Then blow-dry or air-dry as you normally would, without adding an extra step. For regular use, that saves time: the mask replaces your conditioner rather than adding to your routine. Use the mask for the first 4 to 6 washes after a colour or styling treatment, then as needed. How much you use and how often together determine how long the bottle lasts.

When does the large 50 ml bottle pay off?

We sell the K18 Hair Repair Mask in 5, 15 and 50 ml. The 50 ml holds just over three times as much as the 15 ml, and ten times as much as the 5 ml. All three contain the same formula with sh-Oligopeptide-78. If you'd like to try it first, the K18 Hair Repair Mask 5 ml or 15 ml is more practical. That works well for a first try, or for a trip. If you use the mask regularly, the 50 ml costs less per ml.

Active ingredients

Cetearyl Alcohol and Behentrimonium Chloride. This duo gives the mask its rich texture and spreads it evenly through the lengths, so a comb glides through without pulling.

Propylene Glycol. Holds moisture in the hair fibre while the mask does its work.

Hydrolyzed Wheat Protein. Wheat protein broken down into small fragments. These fragments settle into rough spots on the outer hair layer, leaving hair feeling smoother.

Tocopherol. Better known as vitamin E. This antioxidant captures free radicals, particles that weaken the hair fibre over time.

sh-Oligopeptide-78 (K18PEPTIDE™). The ingredient the mask is built around. K18 states that this peptide addresses the sulphur bonds that break down from heat and colouring.

Full ingredient list (INCI)

Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, sh-Oligopeptide-78 (K18PEPTIDE™), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol.

Frequently asked questions

What is the K18 Hair Repair Mask 50 ml?

The K18 Hair Repair Mask 50 ml is a leave-in hair mask by K18. We sell it in 5, 15 and 50 ml; the 50 ml is the largest.

How long does the K18 Hair Repair Mask 50 ml last?

How long the K18 Hair Repair Mask 50 ml lasts depends on how many pumps you use and how often. With regular use, this bottle lasts longer than the 15 ml.

What's the difference between the K18 Hair Repair Mask 50 ml and the 15 ml?

The K18 Hair Repair Mask 50 ml and the 15 ml contain the same formula with sh-Oligopeptide-78. The difference is in volume: the 50 ml costs less per ml if you use the mask regularly.

How often do you use the K18 Hair Repair Mask?

You use the K18 Hair Repair Mask for the first 4 to 6 washes after a colour or styling treatment. After that, you use it as needed, based on how your hair feels.

Do you rinse out the K18 Hair Repair Mask 50 ml?

No, the K18 Hair Repair Mask 50 ml is a leave-in product and stays in your hair. You apply the mask to towel-dried hair, let it work for 4 minutes, and there's no rinsing step.

Take a look at the rest of the K18 haircare range too. Cleanse your hair beforehand with the K18 Detox Shampoo, for a clean base.