Heat-activated Keratin Sealer 5% helps seal the hair’s existing keratin structure for lasting smoothness, frizz and unwanted-volume control. The serum provides heat protection up to 230°C. With the complete Keratin Alpha Sleek routine, it can deliver instant shine lasting up to five days, help defend against up to 80% humidity and support up to two weeks of frizz control. Artificial colourant-free and alcohol-free.
L'Oréal
L’Oréal Professionnel Keratin Alpha Sleek Mirror Sleek Serum
Regular price
£19.50
A heat-activated leave-in finishing serum for all hair types seeking smoother, softer hair with controlled frizz and unwanted volume. Formulated with Keratin Sealer 5%, it creates instant shine, helps defend against humidity and provides heat protection up to 230°C.
Use after the Keratin Alpha Sleek Smooth Transformer or Hair Mask as the final step before blow-drying. When used as part of the complete routine, it supports progressively smoother hair and up to two weeks of frizz control. The formula does not contain keratin; it works with the hair’s existing keratin structure.