Product PKG 42Description:A 3.1 ratio sodium silicateAppearance: A nearly clear to opalescent liquid.Na2O (±0.5%) 9.17SiO2 (±0.7%) 28.43Weight Ratio, % SiO2, % Na2O 3.1(±0.1%)Solid(±0.8%) 37.6Density, @ 20°C °Baume 42 ± 0.7