PURC Keratin Hair Mask Transform your hair with the PURC Keratin Hair Mask. This professional-grade treatment cream is perfect for smoothing, straightening, and repairing damaged hair. Apply generously to damp hair, leave for 10-20 minutes, then rinse for best results. Ideal for combating frizz, this keratin mask restores softness and shine, ensuring your hair looks salon-fresh every day.