Sodium Silicate Powder Index Standard Test Method Modulus 1.95~2.05 ISO 1689 Na2O content by wt % 25~28 ISO 1692 SiO2 content by wt % 48~54 ISO 2124 Na2O + SiO2 content by wt % 78~82 HG/T 4315 Bulk density by g/L 600~800 GB 3603 pH value (1%) 11~12 HG/T 4315 Moisture by wt % 6.5 max HG/T 4315 Insoluble matter by wt % 0.1 max ASTM D501 Iron (Fe) by ppm 100 max ISO 6332 Speed of dissolution (1%) by sec 75 max HT/T 4315 Appearance by visual White granules By visual Application 1. Sodium silicate powder can be used as quick-drying agent and reinforcing agent for cement. 2. Used as the flocculating settling agent for drilling cuttings, the lost circulation additive for bentonite and cement,and the plugging agent for oil and gas wells. Also used as the binder for refractory materials, such as furnace gunning refractory, castable refractory, etc. 3. Used as the binder for foundry industry and insulation materials, and the thickening agent for oil industry, etc. 4.One of the ingredients of detergent.