L’Oréal Professionnel Serie Expert Scalp Advanced Anti-Oiliness 2-In-1 Clay 500ml is a multi-purpose clay that eliminates excess sebum. In this sense, this product has an incredible formula that targets the needs of oily hair. Most importantly, it can be used in two different ways. You can either apply it as a shampoo or as a hair mask. Either way, the goal is the same: eliminate excess sebum. For this purpose, the formula features 6% Clay that offers a purifying action. In fact, this is able to effectively remove residues, sweat, and sebum. That said, it not only reduces sebum by 78% but also increases volume by 24%. Like so, its formula will leave the hair feeling light and voluminous, with a truly clean feel.