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-4B 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.
Item # - Sizes
Water-based for specialty applications
Safe for use on ceramics
Can be used for leak detection
Can be diluted with water
5 gal/18.9 L pail - Item #: 01-3137-40
55 gal/208 L drum - Item #: 01-3137-45
Defect location: Open to surface
NDT Method: Fluorescent Penetrant Testing
Required Equipment: UV light source, like the EV6000