News Weather Horoscopes E-mail Visit our sponsors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chemically it is sodium silicate , potassium silicate, or a mixture of these. It is prepared by fusing sodium or potassium carbonate with sand or by heating sodium or potassium hydroxide with sand under pressure. Water glass is very soluble in water, but the glassy solid dissolves slowly, even in boiling water.
Water glass has adhesive properties and is fire resistant.
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