rc77Description: RC-77 is a level 4, Method B & D non-water washable fluorescent penetrant for inspecting castings, extrusions and similar parts. RC-77 is a versatile, general purposeDescription: RC-77 is a level 4, Method B & D non-water washable fluorescent penetrant for inspecting castings, extrusions and similar parts. RC-77 is a versatile, general purpose