Still worried about it? The crevices of the floor tiles turn black, moldy, and the culture bacteria and smell are so annoying! Product Description Protective Barrier Grout Repair Feathers will cover the stained seams between the tiles and renew the surface after painting, Stubborn grout stains can be refreshed safely and easily. Original color restoreRebuilding grout markers help cover stained seams between tiles, restore or change the color of the tile grout line, andprevent them from getting dirty further. Wide Application of restorer grouting pen lines dry quickly, just follow the grout lines to paint, works on epoxy grout, mortar joints, any grouting areas that start to be a bit dingy and covered with mold. Health MaterialsWater-based environmental ink is non-toxic and safe. Rich in colors, 4 options and no fading. It is suitable for beautifying material gaps, mildew, repairing material gap. Usage scenario, The soft nib of the pen allows for smooth flow. It works on both walls and floors. Clean and repair grout for tiles, home sink, kitchen, shower, bathroom floor tiles. Make them look clean and protected. Specifications:Color: Black, White, Grey, GoldPackage: 1 x Tile Repair PenEasy to Use:1) clean and dry the tile seam before use.2) shake the grouting pen.3) then trace the grouting lines.4) wipe off the excess dye on the tile. Notes:1. Please allow 1-3cm difference due to manual measurement, and 3-5g for difference between different colors.2. Due to the screen difference, the color may be a little different from what you expect, please allow.