Goldwell Kerasilk Revitalize Detoxifying deep cleansing serum with ectoin and red algae extract that strengthens hair from within. The serum effectively eliminates dandruff and compensates for excessive sebum production. For a long-lasting cleaning effect. Reinforces the skin's natural protective barrier, effectively eliminates dandruff and rebalances oily scalp, for a long-lasting purifying effect. How to use Spray the scalp and gently massage the product. Does not require rinsing.