Level 3 Water Washable Fluorescent Penetrant

A high-sensitivity Level 3 penetrant, ZL-67B fluorescent water removeable penetrant is designed to find smaller, finer indications in safety-critical components common to aerospace and engineering applications. ZL-67B penetrant is often used to find flaws in investment castings, jet engine components, and highly machined surfaces.

ZL-67B is specially formulated for strong capillary action which allows it to penetrate defects quickly and bleed out into developer faster and more completely than other penetrants for stronger, higher contrast indications that are easier for inspectors to identify, even when the defects are very fine.

Recommended developers are ZP-4B dry powder, SKD-S2 or ZP-9F solvent-based, and ZP-5B suspendible developers.

Improve indication detection

  • Clear, bright, indications appear every time due to high UV and thermal stability
  • Higher contrast indications form due to strong capillary action, making them easier to spot

More reliable, consistent inspections
Maintain penetrant system performance over longer periods of time thanks to low volatility and high water tolerance.

Wide range of inspections
Inspect a wide range of high-value components without fear of corrosion or specification non-conformance

Maximise operator comfort and safety

  • Promotes better inspection quality by providing the operator with a more comfortable work environment
  • Reduces discomfort from strong odors

Ordering Information

25 litres056C034

200 litres056C035

Product Properties

NDT TypeFluorescent Penetrant Testing

Penetrant TypeType 1

Fluorescent Penetrant SensitivityLevel 3 - High Sensitivity

Penetrant MethodsMethod A, Method C

Removal TypeWater Washable

Required EquipmentUV light source


Ideal ApplicationAerospace alloys, Aerospace inspections, Aluminum, Engineering applications, Highly machined surfaces, Investment castings, Jet engine components, Machined components, Nickel, Precision castings, Precision forgings, Steel, Titanium

Defect ExamplesCracks, Porosity, Seams


StandardsAMS 2644, ASME BPVC, ASTM E1417/E1417M, ASTM E165/E165M-18, ISO 3452-2, MIL-STD-2132, Pratt & Whitney PMC 4360, Rolls Royce RRP 58003 (CSS 232)


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