The L'Oréal Professionnel Scalp Advanced 2-In-1 Deep Purifier Clay Mask is a multi-use treatment for oily scalps. Formulated with 6% clay, it unclogs residue, sweat, and excess sebum. You can use it as a deep-cleansing shampoo or leave it on for 3–5 minutes as a purifying mask for lightweight volume.