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ZL-4C Water Based Penetrant

ZL-4C Water Based Penetrant

SKU: SKU:01-3137-40

Stock Status: In stock
Regular price $779.00 USD
Regular price Sale price $779.00 USD
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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-4D powder 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


    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

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

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