L'Oreal Professionnel Vitamino Color Spectrum Glass Shine Serum for coloured hair 50ml. This serum goes beyond classic serums by coating the cuticle surface to lock in the 5 dimensions of colour spectrum, provide ultimate colour protection & glass shine. Proven efficacy on all coloured hair up to 10 washes. The serum is enriched with 5% Alpha-silane, an active care ingredient that creates a protective layer on the surface of hair fibre when it is activated by heat. Results: Locks in glass shine, anti-frizz effect, Anti-humidity (Up to 80% humidity in the air). Instrumental test for anti-frizz, thermoprotection, hydration, nutrition, smoothness, softness up to 10 washes. Instrumental test for up to 72h after application.