Two Fluorescent Yellow Sakura Solid Paint Markers. The tough marker for tough jobs, the Solid Marker is solidified paint in a marker stick. It marks through oil, grease, rust, mud, snow—inside or outside. Dries within minutes, and is permanent once dry. Solid Markers won't fade or wash off like chalk. The special “stay fresh” twist mechanism keeps paint fresh and ready to use. 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, plumbing systems or with stencils.13 mm wide mark can be trimmed with knife for smaller marks. Alcohol based cleaners will remove ink from non-porous surfaces. Fluorescent colors are not lightfast.