Spectroline Oil-Glo 22 fluorescent dye pinpoints leaks in oil-based lubrication and hydraulic systems on various industrial equipment, including milling and injection-molding machines, hydraulic tanks, forklifts, gear boxes, punch presses, and other paraphernalia. A small amount of Oil-Glo 22 dye is circulated in the hydraulic system; the dye then escapes with the oil and accumulates at the site of a leak. Users scan the system with a high-intensity ultraviolet or UV/blue light lamp, and the dye glows yellow to pinpoint the leak location. Small leaks undetected by other methods are also revealed. Oil-Glo remains safely in the system until the oil is changed, making it suitable for preventive maintenance; periodic inspections with the lamp detect future leaks before they can cause equipment damage.