K18 is one of the most talked-about professional haircare innovations of the decade — a brand built on a single, breakthrough ingredient: the K18Peptide™. This patented biomimetic peptide was engineered to reconnect broken polypeptide chains in the hair's inner cortex, the damage type that most other bond-builders, proteins, and treatments simply can't reach.

Unlike multi-step systems, K18 requires just 4 minutes of leave-in time on clean, towel-dried hair to deliver results. Clinical tests show that K18 reverses up to 91% of chemical damage, 79% of bleach damage, and significant mechanical and heat damage — results that once required weeks of intensive treatment protocols.

At ProHair.ca, K18 is the brand we recommend for clients who want the most efficient, scientifically validated professional repair available today. One treatment per wash is all it takes.