5 Easy minutes. Eliminates grays for a thicker, fuller look. More guys trust their facial hair Just For Men® mustache and beard because our beard dye is specially designed for coarse facial hair. In 5 minutes, gray is gone. As a bonus, facial hair feels softer and more manageable. Made with biotin, aloe, and coconut oil. Can't decide between two shades? Try the lighter one first. You can always go darker later.