Grout marker in white. Features: durable. Suitable for tiles, joints, and ceramic tiles. User: home users. Round tip. The edding 8200 grout marker, also known as a grout pen or tile correction pen, is an excellent way to brighten, color, or correct tile joints. The marker can be used quickly and effectively in the bathroom or kitchen to make your joints shine again. The ink of the edding 8200 grout marker is waterproof and adheres to all types of grout, including silicone joints. With this marker, you can also easily and quickly work on joints in hard-to-reach areas. The precise tip of the grout pen allows you to apply the ink exactly where needed without damaging the surrounding tiles. With its precise and clean application, the edding 8200 grout marker is perfect for color touch-ups and brightening unsightly joints. Thanks to its waterproof property, the marker is also suitable for use in the bathroom. The joints become waterproof and smudge-proof in no time.