Review on 🔲 Waterproof Dark Grey Grout Pen: Tile Colorant and Sealer Marker - Dark Grey, Narrow 5mm Tip (7mL) by Francisco Duncan

Overall SO happy with the changes to our white tile bathroom! Only ONE handle used for the entire bathroom floor and half tiled walls. As others have said, there's a lot you can do to make the coloring process easier. Take the time to refill your pen frequently, vigorous shaking and depressing the tip helps, and most importantly, dipping it in a small amount of water to dilute it makes the process that much easier. Schedule a lap, then go back and touch up areas that haven't taken on color. Use a damp rag to wipe excess material off the tile. Floors were easier for me because the grout was thicker and more evenly spaced. On the walls, the joints were sometimes much thinner and the color was more difficult to set. I still find places that aren't colored that well and touch them up a few days after "finishing".