Tea tree shampoo for oily hair. Tea tree oil is an essential oil extracted from leaves of the tea tree, a shrub native to Australia. 13.05.2018 Megor Gifts with Purchase. Mix a few drops of tea tree oil into a small amount of moisturizer or carrier oil. Skin Care. If it does get into your eyes, rinse immediately with water. Does nothing for the scars. A shampoo base is generally an unscented shampoo that is preserved in a way that it can have additional ingredients added to it, such as essential oils. This shampoo is gentle for cleansing. Email Signup. I like to hear from a professional stand point instead of a beauty supply store merchant that just sells to patrons.