Beauty Sewing Pen Living Room, Bedroom, Bathroom Floor, Sink, Tile Crevice, Beautification Waterproof Stain Remover PenOur sewing pens contain solvents. It is waterproof, mildew resistant and easy to operate. The way to use it is very simple: first open the sewing pen and apply evenly along the gap. And can make the gap quick drying ink, you can make the gap is small, there is no excess debris.