Sebastian Professional Potion 9 has been iconic throughout the hair industry for almost 20 years. This light treatment styler is enriched with nine active botanical ingredients and styling technology to form an advanced, more wearable treatment. Top Tips: For beautiful curls that last, mix Potion 9 with Mousse Forte. Scrunch into hair using your hands and blow dry in. For big, voluminous hair, combine Potion 9 with Thickefy Foam and style with heated rollers or blow-dry.