Retains Original Color: Grout markers help cover stained joints between tiles, restore or change the color of your grout lines. Tile grout, and prevent further staining, giving your home a cleaner look Restores Surface Cleanliness: Grout repair lines dry quickly, cover stained joints between tiles and renew the surface after painting, making them clean and protected for a new visual experience of your home Quality Materials: Each grout pen is primarily made from water-based materials, safe and non-toxic, harmless for children and pets. The wall grout pen size is approximately 15 mm in diameter and 140 mm in length, easy to handle For Home Renovation: Grout restoration pens can be safely used in kitchens, bathrooms, shower cabins, verandas, outdoor areas, walls, floors and many other dirty tile zones. Follow the grout lines to paint, works on epoxy grout, brickwork, all grout areas that start to get a bit dirty and covered with mold