Keratin Alpha Sleek Mirror Sleek Serum by L'Oréal Professionnel, formulated with Keratin Sealer 5%. It seals the hair's keratin structure for long-lasting smoothness, frizz & volume control.
This Mirror Sleek Serum is heat-activated, delivering instant shine that lasts up to 5 days1. The serum helps fight against up to 80% humidity2, whilst offering heat protection up to 230°C (450°F)3.