Redken Pre Art Clarifying Treatment All Hair Type 33.8 oz Brand New Authentic Redken Pre Art Clarifying Treatment (33.8 oz) is designed to effectively remove pollution, daily grit, excess sebum, and styling build-up from hair. It also helps to level the porosity of hair for even color results1. This treatment is suitable for all hair types and is often used as a pre-color treatment to ensure optimal results.