A non-sterile substance intended for professional use as a dental cement (e.g., luting agent, liner, base) and/or direct dental restorative material whereby the majority of the setting reaction is based on the hardening reaction between a powder of acid soluble aluminosilicate glass and metal oxides [principally zinc oxide (ZnO)] and an aqueous solution of phosphoric acid (which may contain metal ions). After application, this device cannot be reused.