Sodium silicate, also known as waterglass, is a white or colorless compound with a thick slippery texture that is composed of sodium oxide and silica.

It is used in a variety of applications, including as a binder, detergent builder, and fire retardant. Sometimes used to temporarily seal small cracks in the cooling system.

Sodium Silicate Physical and Chemical Properties

• Sodium silicate: 49% Wt.%
• Water: 51% Wt%

• Appearance: Thick liquid.
• Color: Clear to murky white.
• Odor: Odorless or musty odor.
• pH: Approximately 11.3
• Specific gravity: 1.39 g/cm3 (20°C), 55° Be, 11.62 lbs/gal
• Solubility in water: Miscible.