Magnaflux Zyglo ZL-15B, WW Fluorescent Penetrant Level 1/2 3806 Magnaflux Zyglo ZL-15B, WW Fluorescent Penetrant Level 1/2 Print 3806 Magnaflux Zyglo ZL-15B, WW Fluorescent Penetrant Level 1/2 Level 1/2, water washable fluorescent penetrant for penetrant inspection. MGZL15B-1: ZL-15B, 5gal (18.9L) pail. MGZL15B: ZL-15B, 55gal (208L) drum. Request for information