Search query: hair color shampoo for gray hair

Product: Just For Men Easy Comb-In Color (Formerly Autostop) Mens Hair Dye, Easy No Mix Application - Real Black, A-55
Brand: Just for Men
Color: Real Black
Relevance: Exact
New look and name, same foolproof Autostop results, this patented formula automatically stops coloring after 10 minutes, so you can't go too dark. Just for men easy comb-in color, real black, makes getting rid of your gray hair easy.
Using this no-mix men's hair coloring product is as easy as combing your hair. Simply attach the comb applicator to the pre-mixed color tube, comb into your hair to apply, wait ten minutes, and rinse your hair out in the shower
Choose from 11 different shades ranging from sandy blond to rich black. When in doubt, always go with a lighter shade. Our gentle formula contains no ammonia or peroxide and is enhanced for better coverage from roots to ends.
Our product will not wash out, lasts up to 8 weeks until the gray grows back. The comb applicator helps you apply exactly where the gray is. Works for both all over or on target areas.
Unlike other dyes, our easy, no-mix formula stops coloring after ten minutes. Make sure to follow all instructions included in the package, and perform a skin allergy test 48 hours before use

Product: Revlon Root Erase Permanent Hair Color, At-Home Root Touchup Hair Dye with Applicator Brush for Multiple Use, 100% Gray Coverage, Dark Brown (4), 3.2 oz
Brand: REVLON
Color: 4 Dark Brown
Relevance: Substitute
INSTANT ROOT TOUCH-UP: Permanent hair dye formula seamlessly matches leading hair color shades with 100% gray coverage for gorgeous results
RESULTS IN 5 MINUTES: Like magic, our root touch-up formula transforms your roots to match your hair color in as little as 5 minutes—whether it's at-home or salon hair dye
AWARD-WINNING HAIR COLOR PRODUCT: Root Erase is the 2019 winner of Allure's Beauty of Beauty Award for Root Coverage/Hair Color
MULTI-USE KIT UP TO 3 TIMES: Each can of color can be used up to 3 times. We designed the can so the nozzle can be easily removed for cleaning and 3 pairs of gloves are included, so you're set for every application
EASY, LESS MESS APPLICATION: Ready to use can dispenses both creams at once. Just pump the can, mix the formula in the cap (yes, it doubles as a mixing bowl), and apply with included brush