Sodium Silicate Uses

  • Tanya Schifone
  • June 4, 2012 3:25 pm

Sodium silicate has a variety of uses, both as a stand alone product and in combination with a variety of other chemicals. You can’t use the same sodium silicate for every use. Sodium silicates have different compositions which allow them to be used in different applications. Examples of sodium silicate uses are as follows:

  1. Concrete Sealer. Sodium silicate is most commonly used as a Concrete sealer and strengthener.
  2. Adhesive. Sodium silicate is used as an adhesive for securing labels to cartons.
  3. Automotive. Sodium silicate is used to fill gaps in head gaskets.
  4. Preservative. Sodium silicate is used to preserve eggs.
  5. Drilling Fluids. Sodium silicate is used in drilling fluids to stabilize borehole wells and to avoid the collapse of bore walls.
  6. Safe Construction. A mixture of sodium silicate and sawdust has been used in between the double skin of certain safes. This not only makes them more fire resistant, but also makes cutting them open with an oxyacetylene torch extremely difficult due to the smoke emitted.
  7. Water Treatment. Sodium silicate is used as coagulant/flocculant agent in waste water treatment plants. Sodium silicate binds to colloidal molecules, creating larger aggregates that sink to the bottom of the water column. The microscopic negatively charged particles suspended in water interact with sodium silicate. Their electrical double layer collapses due to the increase of ionic strength caused by the addition of sodium silicate (doubly negatively charged anion accompanied by two sodium cations) and they subsequently aggregate.
  8. Brewing. Sodium silicate flocculant properties are also used to clarify wine and beer by precipitating colloidal particles.


*Please note, the Foundation Armor concrete sealer should only be used for sealing concrete.

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