Keratin Alpha Sleek - Mirror Sleek Serum for long-lasting smoothness, frizz & volume control.

Keratin Alpha Sleek Mirror Sleek Serum by L' Oreal Professional is formulated with 5% Keratin Sealer technology.

It helps seal the hair's keratin structure, delivering long-lasting smoothness and volume control for up to 10 washes*. The formula provides protection against humidity levels of up to 80%* and offers heat protection up to 230°C (450°F)*.

It can reduce daily styling time by up to 50%* and, when used as part of the complete routine, helps keep hair smooth and frizz-free for up to two weeks.**

Activated by heat, the serum should be blow-dried into the hair. For longer-lasting results, follow with straighteners.

The formula is free from artificial colourants and alcohol.

Although keratin is an animal-derived protein that is also naturally present in human hair, this product does not contain keratin.