Sodium silicate

Research on sodium silicate began in the 18th century, and production for industrial use began in the U.S. in the mid-19th century. Production first began in Japan in 1903. Sodium silicate has different physical and chemical properties depending on the molar ratio of its three components: Na2O, SiO2, and H20. Sodium silicate’s properties differ depending on its SiO2/Na2O molar ratio. AGC Si-Tech manufactures it within a molar ratio range of 2.0 to 3.2.

※In Preparation


Sodium silicate is also widely used as a raw material for our silica gel and is permanently in stock.
We have earned trust by providing a stable supply of sodium silicate over many years.


Construction Used in ground reinforcement by combining with a hardener
Soap and synthetic detergent Used as a dispersant and as a surfactant and bleaching aid
Paper and pulp As a stabilizer for bleach
Casting, ceramics Used as a binder for molding sand
Fibers To improve texture and as a stabilizing aid for bleach
Welding rods As a binder for welding rod flux
Adhesives For use as an adhesive, owing to its adhesive qualities
Water purification and flotation As a flocculant
Silica gel material It is also used in-house as a material for various silica gels.

Product Lineup

Name Molar ratio Main applications
Sodium silicate No. 1 2 Soil hardeners, synthetic detergents, casting, ceramics
Sodium silicate No. 2 2.5 Synthetic detergents, casting, ceramics
Sodium silicate No. 3 3 Soil hardeners, paper and pulp, zeolite material, ceramics


  • 10-ton truck
  • 280-kg drum
  • 25-kg container