The Milwaukee Hand Tools INKZALL™ XL Chisel Tip Marker can continue to write after 72+ hours of cap off time. It can be used on wet, oily, dusty, rusty, with debris surfaces. The ink has a quick drying time, which reduces smear markings on PVC and metal surfaces. The mark left is easier to read from a distance due to the increased chisel tip sizes. Suitable for use on concrete, wood, metal, plywood, OSB and plastic.