waterglass

noun

1. (uncountable, usually)Sodium silicate.

   “a cheaper process for fire-proofing canvas, consisting of the deposition in the fiber of a double sodium and lead silicate. Boiling solutions of basic lead acetate and of waterglass were used.”

   “Waterglass (Silicate of Soda) Cement. By combining waterglass with cement or quicklime a double silicate, hard as stone and resisting chemical agents, is formed in a short time.”

   “A fly ash material used in a study (by Xie and Xi) contained a high fraction of reactive oxides which reacted significantly with a waterglass (Na₂SiO₃) activator, leading to a high strength within a short time and under relatively lower temperatures”