K18 Hair Products, Beyond the Famous Mask

K18 became a cult name through a single product, a leave-in mask that hairdressers recommended to clients with bleached and heat-damaged hair. The brand is built around its patented K18Peptide, which it says works inside the hair to repair broken bonds. Understanding the range of K18 hair products is easier once you see that the mask is still the core treatment and everything else supports it. The Leave-In Molecular Repair Hair Mask goes on clean, towel-dried hair and is not rinsed out. The AirWash dry shampoo is the newer, everyday product for days between washes.

FutureIQ is a hair longevity serum aimed at scalp ageing, thinning and graying. HeatBounce is a leave-in conditioner and heat protectant for anyone who styles hot.

A repair treatment works better when the wash routine is not stripping the hair at the same time. The Peptide Prep clarifying detox shampoo removes build-up from styling products and hard water, which is useful once a week rather than every wash. The Damage Shield protective conditioner is the daily partner, designed to protect hair from environmental damage between treatments. Use the clarifying shampoo first on a treatment day so the mask goes onto a clean surface. It is a small change in order that makes a visible difference.

The Molecular Repair Hair Oil smooths frizz and adds shine on dry ends. The Damage Shield pH protective shampoo is the gentle everyday wash that pairs with the conditioner.

If your hair is bleached, coloured or heat styled, start with the mask alone for a few weeks before adding anything else, so you can see what it does. Fine hair usually prefers the oil in tiny amounts and the dry shampoo between washes, while thick or curly hair can take the conditioner and oil daily. The serum is a separate category, aimed at the scalp rather than the lengths. What I would skip is buying the whole range at once, since most people only need the mask, one shampoo and one conditioner.