K18 Leave-In Molecular Repair Hair Mask 5ml is a powerful, peptide-infused treatment that reverses hair damage in just 4 minutes. Formulated with the patented K18PEPTIDE™, this leave-in mask works at the molecular level to restore strength, softness, and elasticity. It repairs damage caused by bleaching, coloring, heat, and chemical treatments, leaving hair healthier and more resilient. Unlike traditional conditioners, K18 penetrates deep into the hair cortex for long-lasting repair. Lightweight and silicone-free, it nourishes without buildup. Perfect for all hair types. Apply to damp hair, leave in, and style as usual—no rinse required.