Sealing grout on tile floors involves cleaning the grout lines thoroughly to remove dirt and stains. Once dry, apply a grout sealer using a small brush or applicator. Ensure even coverage and allow it to cure according to manufacturer instructions. Regular sealing helps prevent stains and moisture from penetrating the grout.

Proper grout sealing enhances the durability and appearance of tiled surfaces. Key benefits include preventing stains and water damage, while challenges may arise from ensuring even application. Regular maintenance is crucial to preserve the integrity of grout lines.