Hair Mask for Dandruff (seborrheic dermatitis) Plain all Natural yogurt- 2 cups Tea Tree Oil- 3 to 5 drops Castor Oil- 1 Tablespoon Honey- 1 Tablespoon Apply to hair in sections, saturating from scalp to ends of hair. Pay special attention to areas where lots of flakiness occurs. Cover hair with plastic cap or plastic bag for 30mins to 1 hour then rinse out while rubbing scalp. Condition hair and style as usual. I don’t suggest shampooing out the mask.