Make all your bathroom and kitchen grout-covered surfaces look new again with the Rejuvenate White Grout Restorer Marker Pens. They?re designed to instantly color and cover stained, dirty or old grout. It restores grout to its original color, making your home look like the day it was built.They instantly restores the color of your dirty, old grout with little effort?.it?s easy to make your kitchen and bathrooms look new again! To use, simply shake the pen thoroughly and depress the tip a few times to prime. Apply the pen to your grout and watch your floor come alive! If you get any colorant on the tile, just wipe it off immediately with a soft cloth.Each pen will cover 160 linear feet and is non-toxic so it?s safe for your family and pets.And just like that, your grout is new again.