Waterproof Tile Grout Marker Pen dries quickly after application, forming a stain-resistant layer that keeps tile grout lines looking fresh and tidy over time. This Grout Repair Pen is designed for hassle-free use on various tile surfaces, including kitchen floors, bathroom walls, and shower stall grout lines, without complicated preparation steps. Tile Grout Repair Pen simplifies the process of refreshing discolored or dark grout lines, allowing for quick color restoration and renovation of kitchen and bathroom tiles. Grout Marker's sturdy plastic body combined with a long-lasting fiber tip ensures reliable use through multiple grout touch-up and repair projects. Grout Pen White features a fiber tip that consistent ink for smooth, precise application, making it easy to control the coverage area on tile grout lines.