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Container Size & Part Number

Aerosol can, case of 12       01-3188-78

5 gal / 18.9 L pail                 01-3188-40

20 gal / 75.7 L drum            01-3188-30

55 gal / 208 L drum             01-3188-45


Level 4 post-emulsifiable fluorescent penetrant for Method B, Method C and Method D liquid penetrant testing, QPL SAE AMS 2644 and Pratt & Whitney approved.

Level 4 Post Emulsifiable Fluorescent Penetrant

Essential for critical component applications, ultra-high sensitivity ZL-37 post-emulsifiable penetrant is designed for detecting fine, tight discontinuities in safety-critical components, such as titanium turbine components, and in high-stress parts, such as investment castings.

This Type 1 penetrant is non-water-soluble so there is minimal risk of washing ZL-37 penetrant from a fine or shallow defect which makes this penetrant inspection the most reliable, dependable form of PT testing. ZL-37 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.

ZL-37 can be removed with ZE-4E Method B lipophilic emulsifier or ZR-10E Method D hydrophilic emulsifier.

ZL-37 is listed on the QPL SAE AMS 2644 Qualified Product List and is approved for use by Pratt & Whitney.

ZL-37 Product Data Sheet
ZL-37 Liquid Safety Data Sheet
ZL-37 Aerosol Safety Data Sheet