ZL-425

Water-Based Fluorescent Penetrant

ZL-425 is a water-based, Level 1 fluorescent penetrant designed for non-destructive testing of surfaces requiring low sensitivity inspection. It provides reliable detection of gross surface discontinuities, with easy water-washable removal and bright fluorescence under UV-A light, making it suitable for fast, general inspections.

Features

Level 1 sensitivity: Detects major surface defects such as laps, seams, and gross cracks
Water-based, water-washable: Quick and easy removal reduces inspection cycle time
Bright yellow-green fluorescence under UV-A (~365 nm) for clear defect visibility
Good surface wetting for even coverage on various materials
Compatible with dry powder and aqueous developers for versatile use
Low background fluorescence to improve indication contrast
Operator-friendly with low odor and safe handling characteristics

Applications

General inspection of castings, forgings, welds, and machined parts
Detection of large cracks, laps, seams, porosity, and other gross surface defects
Suitable for routine aerospace, automotive, and industrial part inspections
Ideal for screening components before higher-sensitivity testing

Technical Data

Specification	Details
Type	Water-based fluorescent liquid penetrant
Sensitivity Level	Level 1 (Low)
Removal Method	Water-washable
Fluorescence Color	Yellow-green under UV-A (~365 nm)
Material Compatibility	Steel, aluminum, titanium, nickel, and other common alloys
Surface Types	Castings, forgings, machined and welded surfaces
Detectable Defects	Large cracks, laps, seams, porosity, cold shuts
Developer Compatibility	Dry powder and aqueous developers
Standards Compliance	AMS 2644, ASTM E1417, ISO 3452-2
Packaging Options	Aerosol cans, 5 L, 25 L, and bulk containers