ZL-56, Type 1 fluorescent penetrant, Water washable, Level 4


  • Description
  • Additional information


An 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-4B powder, ZP-9F non-aqueous, SKD-S2 non-aqueous and ZP-5B water suspendible.

ZL-56 is listed on the QPL SAE AMS 2644 Qualified Product List.


  • Bright, high-contrast indications
  • Ideal for critical part inspection
  • Ultra-high sensitivity for aerospace inspections
  • QPL SAE AMS 2644 Qualified Product List


Additional information

Weight 501227 lbs

5 Gal. Pail, 55 Gal. Drum