pyrotechnics-revived/chapters/99-1-chemical-sodium-silica...

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## Sodium Silicate
**Formula**
$Na2SiO3$
**Pyrotechnics use**
**Synonyms**
**Description**
Sodium silicate, also known as water glass or liquid glass, available in liquid and solid (prill) form, is used for passive fire protection.
**Sources**
It can be bought from online pyrotechnic stores and ceramic supply shops. It can be bought in either liquid form or a dry powder. When dry it is mixed with water and a small amount is placed around pass fire holes and exhaust holes (see hummer).
**Hazards**
Sodium silicate is corrosive and may cause health problems with over exposure. It is best to avoid eye and skin contact and vapour or mist inhalation.