Magnaflux ZL-15B Level ½ Water Washable Fluorescent Penetrant

ZL-15B water washable penetrant is a low-sensitivity penetrant that features excellent washability. It is used to find open surface flaws such as cracks and porosity in seams, laps, cold shuts, and laminations on castings, forgings, extrusions, and parts with rough surfaces.

Available through special order. Contact IR to place your order.


ZL-15B water washable penetrant can be developed with ZP-4B dry powder developer, with ZP-5B water suspendible developer in an agitated tank or with ZP9F non-aqueous developer. With a UV-A light source, indications will appear as a bright green-yellow fluorescence. ZL-15B is listed on the QPL SAE AMS 2644 Qualified Product List.


  • Excellent washability

Ideal For

  • Castings
  • Forgings
  • Rough surface finish
  • Seams
  • Laps
  • Cold shuts
  • Laminations

For more information, see manufacturer’s product sheet:  Product Sheet – Product Sheet – Magnaflux ZL-15B Level ½ Water Washable Fluorescent Penetrant


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