TRESEMMÉ LISO KERATINA Intensively Nourishing Mask. The Smooth Keratin mask revitalizes and nourishes the hair intensely. It also prevents frizz for up to 48 hours. Apply generously and evenly from the mid-length to the ends and remove what is left at the root. Run a thick-bristled brush or your fingers to detangle. Let it act for 3 to 5 minutes and rinse it abundantly. Use it at least once a week.