Slurry aluminide coatings with newly-developed composition have been produced on Mo-base alloy TZM (Mo-0.5 Ti-0.1 Zr-0.02 C) in an argon atmosphere. The slurry composition was: powder of silicon, halide salts as an activator and a water solution of a soluble glass as an inorganic binder. The coatings were produced at temperatures from 900 to 1200°C and times from 2 to 10 hours. The microstructure, chemical composition using energy-dispersive X-ray spectroscopy (EDS) and phase composition by X-ray diffraction (XRD) of the coatings were determined and the correlation between the technological parameters and the coating thickness was analyzed.