Magnaflux ZL-15B Water Washable Fluorescent Penetrants
Used for non-destructive testing (NDT)|Fluoresces a bright greenish-yellow under ultraviolet radiation|Safe for use on most engineering and aerospace alloys including aluminum, steel, nickel and titanium|Exhibits excellent rough surface washability and is typically used on castings, forgings, extrusions and rough machined surfaces to find cracks, seams, laps, cold shuts, laminations and porosity|