- AMS 2644
- Boeing BAC 5423 PSD 6-46 or 8-4
- Boeing PS-21202
- NAVSEA T9074-AS-GIB-010/271
- QPL SAE AMS 2644
Magnaflux Water-Washable Liquid Penetrant
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.