Sodium+Silicate

Sodium Silicate is the common name for a compound sodium metasilicate, Na2SiO3 also known as water glass or liquid glass.

Uses
It is used in cements, passive fire protection, refractories, textile and lumber processing, and __automobiles__.
 * Metal repair
 * Automotive Repair
 * Homebrewing
 * Car Engine Disablement
 * Adhesive
 * Aquaculture
 * Food Preservation
 * Drilling Fluids
 * Concreate Treatment
 * Passive Fire Protection
 * Safe Construction
 * Refactory Use
 * Water Treatment
 * Magic Crystals
 * Dye
 * Sealing of Leaking Water

It is available in aqueous solution and in solid form and is used in cements, [|passive fire protection], refractories, textile and lumber processing, and automobiles. [|Sodium carbonate] and [|silicon dioxide] react when molten to form sodium silicate and [|carbon dioxide] : Na2CO3 + SiO2 → Na2SiO3 + CO2 Anhydrous sodium silicate contains a chain polymeric anion composed of corner shared {SiO4} tetrahedral, and not a discrete SiO32− ion. In addition to the anhydrous form, there are hydrates with the formula Na2SiO3·nH2O (where n = 5, 6, 8, 9) which contain the discrete, approximately tetrahedral anion SiO2(OH)22−with water of hydration. For example, the commercially available sodium silicate pentahydrate Na2SiO3·5H2O is formulated as Na2SiO2(OH)2·4H2O and the nonahydrate Na2SiO3·9H2O is formulated as Na2SiO2(OH)2·8H2O. In industry, the different grades of sodium silicate are characterized by their SiO2:Na2O ratio, which can vary between 2:1 and 3.75:1. Grades with this ratio below 2.85:1 are termed 'alkaline'. Those with a higher SiO2:Na2O ratio are described as 'neutral'.