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Oil and waterproof by virtue of its plastic-impregnated glass coating
on textured/rough surface finishes or on unmachined parts where indication visibility and through-put are important
Leak detection
which comes as a clear to amber liquid
It can be developed with ZP-4D dry powder developer
ZL-56 Water Washable Penetrant - Level 4 Packaging:55 Gallon Drum Oil and waterproof by virtueAn ultra high sensitivity penetrant (Level 4), ZL 56 fluorescent water washable penetrant is safe for use on alloys in engineering and aerospace use, including aluminum, steel, nickel and titanium. ZL 56 is designed for non porous and highly machined components. Developers recommended are ZP 4D powder, ZP 9F non aqueous, SKD S2 non aqueous and ZP 5B water suspendable. ZL 56 is listed on the QPL SAE AMS 2644 Qualified Product List. Benefits Bright,
