【Multiple Usage Scenarios】The grout pen can be safely applied to kitchens, bathrooms, showers, porches, patios, walls, floors and many dirty tile areas. 【Strong Practical】Tile caulk helps to cover stained joints between tiles, restore or change the color of tile lines, prevent them from further staining, and make your home look neater. 【Safe Material】The grout pen is mainly made of water-based ink, acrylic tip, waterproof and moisture-proof, strong coverage, non-fading, and safe for children and pets. 【Easy to Carry】The size of the grout pen is about 1cm in diameter, 13cm in length and 17g in weight, small and portable, easy to carry, shake well before use, press the pen tip vertically until the ink just flows out. 【Restore Clean】The grout pen has the characteristics of fast drying, which can cover the stained joints between the tiles and update the appearance after painting, bringing you different home visual experience.