Product Overview

L’Oréal Professionnel Serie Expert Keratin Alpha Sleek Mirror Sleek Serum is a professional smoothing serum designed to control frizz, protect hair from humidity and deliver long-lasting shine. Formulated with Keratin Sealer Technology, the lightweight leave-in formula helps seal the hair fibre surface while improving smoothness and manageability.

Activated with heat styling, the serum provides up to 80% humidity protection and helps maintain sleek results for up to four days. Hair appears smoother, glossier and easier to style after each application.

Laura loves this product because… it creates a sleek salon finish with lasting shine while helping protect hair from humidity and frizz.