Zyglo ZL-15B Water Washable Fluorescent Penetrants, 5 gal

Features: 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