Abstract: A spacer to bridge the interspace between two parallel panes of glass in a multilayer insulating glass. The spacer includes two hollow metal sections mutually spaced apart. A solid web of an unfoamed and fully-cured polyurethane casting compound fills the space between the hollow sections and adheres to the facing surfaces of the sections. The hollow sections and solid web form a spacer having relatively high torsional rigidity and electrical insulation, and having relatively low thermal conductivity between the glass panes. The outside surface of the web is covered with a layer impermeable to vapor.