The tough marker for tough jobs, the Solid Marker is solidified paint in a marker form. It marks through dust, rust, mud, water – inside or outside. Dries within minutes, and is permanent once dry. Solid Markers won’t fade or wash off like chalk.Solid marker features a tough, broad stroke, is quick-drying with low odor. Ideal for use on wood, cloth & canvas, plastic, steel & iron, rubber, cardboard, glass, fiberglass & concrete. This marker is widely used in commercial and industrial applications in construction, welding & fabrication, pipelines & drilling, assembly lines, automotive tires & windshields, HVAC and plumbing systems.