SILIFORM
Auxiliary Agents for Metal Casting Work to Protect the Sand Molds and Cores and to Produce Smooth, Clean Surfaces on the Cast Objects-Namely, Chemical Heat and Fire Resistant Insulating and Separating Agents, Smoothing Agents, Blackening Agents, Surface Hardening Agents for Molds and Cores (Except Spreading Agents in the Form of Lacquers and Paints)
Cancelled · August 19, 1980 · 73274741 ·