Black dexe hair shampoo for covering all your grey hair while conditioning your hair strands. ideal for covering all types of grays, leaving the hair soft and shiny. dexe hair dye is known to work well for all skin and hair types without causing any irritation or damage. can be used on both natural or chemically treated hair. The hair dye formulation has good long-lasting coverage that lasts up to 4-8 weeks. It does not interfere with other hair products. Dexe hair dye does not stain your skin and washes off well so as not to stain your pillows or bedding. used both professionally and at home.