Magnaflux Zyglo ZL-19, WW Fluorescent Penetrant Level 1 Magnaflux| 3812 Magnaflux Zyglo ZL-19, WW Fluorescent Penetrant Level 1 Print Magnaflux| 3812 Magnaflux Zyglo ZL-19, WW Fluorescent Penetrant Level 1 Magnaflux Level 1 water washable fluorescent penetrant for penetrant inspection. MGZL19-1: ZL-19, 5gal (18.9L) pail. MGZL19: ZL-19, 55gal (208L) drum. Request for information