SILMACO produces the complete range of liquid sodium silicates with SiO₂/Na₂O ratio's ranging from 1,65 (highly alkaline) towards 3,45 (highly siliceous). The high ratio silicates are the most refractory as well as the most resistant to acids but they contain more water compared to the lower ratio solutions. We are able to adjust the ratio and concentration depending on your needs.  Our solid sodium silicates differ in solution rate according to their ratio, particle size and degree of hydration. High alkalinity (low ratio), small particle size and some water content all help to increase the speed of solution. Our sodium metasilicates (ratio 1.0) are the most alkaline ones. We have sodium metasilicate available in anhydrous-, pentahydrate and nonahydrate form, each of which differs in terms of concentration. Metasilicates all dissolves very easily, even in cold water. Our metasilicate nonahydrate with its high water content and low melting point (48°C) is especially useful in self flowing hot repair mixes. Whereas metasilicate anhydrous and -pentahydrate are mainly used as an accelerator for chemical bonded mixes. Our sodium disilicate (ratio 2.0) and -trisilicate (3.4) are produced in hydrated form in order to be soluble at room temperature. Their higher SiO₂/Na₂O ratio give them more binding capacity compared to metasilicates and they are therefore used as a part of the binder system in mortars, putties and (tundish) gunning mixes. 

We also produce a broad range of lithium silicate solutions with SiO₂/Li₂O ratio's ranging from 2,95 towards 5,80. Lithium silicates are high ratio, low viscosity solutions that has excellent binding and refractory properties !