sodium silicate

Noun

 * 1) Chemical compounds with the formula Na2xSiy,O2y+x or (Na2O)x·(SiO2)y, such as  Na2SiO3,  Na4SiO4, and  Na6Si2O7.
 * 2) A mixture of such compounds, especially the metasilicate, used in the formulation of cements, coatings, passive fire protection, textile and lumber processing, manufacture of refractory ceramics, as adhesives, and in the production of silica gel.