Waterproof Paint Pen with 3mm round broad tip delivers long time, fade resistant color for grout maintenance in humid areas like bathrooms and kitchens. Engineered with casing and quick dyring pigment, this multipurpose paint marker ensures precisely filling while prioritizing for indoor use. Suit for enthusiasts, busy homeowners, and family seeks kid/pet friendly ceramic repair paint pen for household improvement project. Perfectly seals break lines between ceramic tiles, glass surfaces, or wooden decoration while resisting damage in showers, backsplashes, and craft project. Streamlines your renovation work efficiency with this water resistant grout marker – achieves professional result on intricate pattern and narrow space effortlessly.