Sodium Silicate is the common name for a compound sodium metasilicate, Na2SiO3, and is also referred to as liquid glass.
Sodium Silicate is commonly used in ceramics as a deflocculant in slip preparation by neutralizing the charges of particles in the slip, allowing for more even suspension and thinning. This is a sodium silicate solution and should be mixed with water to a 50/50 solution for most casting bodies.
Sodium Silicate Safety Data Sheet
** please see the Safety Data Sheet for information relating to the concentration of this sodium silicate solution.