Just For Men Mustache & Beard Brush-In Color Gel M-45 Dark Brown 1 Kit - 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. Instructions: Brush in. 5 minutes. Shampoo out. Always remember to do the 48-hour skin allergy test before use. Shade Selection Tip: Can't decide between 2 shades? Try the lighter one first. You can always go darker later. Only have a little bit of gray? Go with a lighter shade first for the most natural look. Getting some gray head hair, too? Try just for men autostop or original formula in the same shade.