Original concrete trade vintage catalog for THE MASTER BUILDERS COMPANY of Cleveland, OH. Manufacturers of Omicron Mortarproofing for leaky mortar. Integral liquid colored hardner Colormix, coloring floors Colored Metalicron, Stearox, Metalicron, and more. Disbound from a large 1938 construction equipment book, this unique sixteen page technical specifications brochure would make a sensational addition to your retro architectural design library. Pages are loose and contain a small amount of residual glue on edge.