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Magnaflux Zyglo ZL-27A Post Emulsifiable Fluorescent Penetrant

Magnaflux ZL-27A


  • Level 3 high sensitivity
  • Post emulsifiable
  • Bright indications
  • Resists over-washing or over-removal
  • High flash point
  • Wide range of application methods
  • Low odor
  • Very low toxicity
  • Alloy compatibility
  • High thermal resistance
  • High UV stability
  • QPL SAE AMS 2644 Qualified Product List
  • Approved for use by Pratt & Whitney

Content: 400ml
Quantity: One Piece
Made in UK

In Stock


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Level 3 Post Emulsifiable Fluorescent Penetrant

Post-emulsifiable ZL-27A is a Level 3, high-sensitivity Type 1 penetrant designed for inspections which require maximum process control and reliability, such as safety-critical aerospace testing.

Since ZL-27A is not water soluble, there is minimal risk of this penetrant being removed from a fine or shallow defect through over-washing to provide the highest reliability of any penetrant inspection method.

ZL-27A has a high flash point and provides long tank life when used in open dip tanks, but this penetrant can also be applied in a variety of other ways, including electrostatic spray.

To remove surface ZL-27A penetrant before developer application, use ZE-4E Method B lipophilic emulsifier or ZR-10E Method D hydrophilic emulsifier can be used.

ZL-27A is listed on the QPL SAE AMS 2644 Qualified Product List and is approved for use by Pratt & Whitney.


Improve indication detection

  • Clear, bright indications are easier to detect due to high UV and thermal stability – even for small flaws and discontinuities
  • Indications stand out more since background fluorescence is minimized; emulsifiers only remove surface penetrant without the risk of over-washing

Maximize penetrant inspection process control

  • Prevents over-washing since ZL-27A cannot be removed with water (unless combined with an emulsifier)
  • PE penetrant system is less susceptible to human error since only surface penetrant is removed in the final rinse stage

Wide range of inspections

    • Inspect a wide range of high-value components without fear of corrosion or specification non-conformance
    • Meets all major industry and NDT specification requirements, including Aerospace Prime and OEM specs, AMS 2644 and ISO 3452





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