Magnaflux Zyglo ZL-4C Penetrant - 5 Gallon Pail

Item# 01-3137-40
Availability: In stock
Ship weight: 48 lbs

Water-Based Fluorescent Penetrant

Developed for testing materials that can be affected by petroleum-based penetrants, ZL-4C water-based fluorescent penetrant contains no petroleum derivatives and is harmless to materials that can be attacked by petroleum-based solvents, such as plastics. It is also safe for use on ceramics, and it can be used as a leak detector. It is always recommended that the inspection material is tested for compatibility with ZL-4C prior to use.

ZL-4C can be diluted with water to decrease its viscosity to enable easier application. ZL-4C does not contain a corrosion inhibitor as the materials it is designed to test are not normally susceptible to corrosion.ZP-4Bpowder developer is recommended for use with ZL-4C penetrant, because liquid developers may wash penetrant out of open surface flaws in the non-metallic materials being tested.


  • Water-based for specialty applications
  • Safe for use on ceramics
  • Can be used for leak detection
  • Can be diluted with water


  • ASME
  • ASTM E165

  • Applications

    Defect location:open to surface

    Ideal for:

    • Plastic components
    • Ceramic components
    • Leak detection
    • Defect examples:

      • Cracks
      • Leaks

      • Use Recommendations

        NDT Method:Fluorescent Penetrant Testing

        Required Equipment:UV light source, like theEV6000

        Temperature Range:40 to 125F / 4 to 52C

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