Product Introduction & Main Application
Arnico’s Sodium Silicate, commonly known as water glass, is a viscous, clear-to-slightly-hazy inorganic chemical solution with the formula Na₂O·xSiO₂. It is produced in a range of molar ratios (SiO₂:Na₂O from 2.0 to 3.3) to suit various industrial needs. Its primary functions include serving as a high-temperature adhesive, an alkaline detergent builder, a binder in foundry molds, and a cementitious sealant and densifier for concrete and soil stabilization.
2. Technical Specifications
| Technical Parameter | Alkaline Grade (2.0 Ratio) | Neutral Grade (2.5 Ratio) | High-Silica Grade (3.3 Ratio) | Unit |
|---|---|---|---|---|
| Na₂O Content | 14.5 – 15.5 | 10.5 – 11.5 | 8.5 – 9.0 | % |
| SiO₂ Content | 29.5 – 30.5 | 26.5 – 27.5 | 27.5 – 28.5 | % |
| Weight Ratio (SiO₂/Na₂O) | 2.0 ± 0.1 | 2.5 ± 0.1 | 3.3 ± 0.1 | – |
| Specific Gravity at 20°C | 1.55 – 1.60 | 1.40 – 1.45 | 1.35 – 1.40 | g/cm³ |
| Viscosity at 20°C | 400 – 800 | 100 – 300 | 50 – 150 | cP |
| Total Solids | 44 – 46 | 37 – 39 | 36 – 38 | % |
3. Features & Benefits
Exceptional Binding Strength: Creates strong, rigid bonds for paper, corrugated cardboard, and refractory cements.
High Alkalinity: Acts as a powerful pH buffer and saponifying agent, making it an effective replacement for phosphates in industrial and laundry detergents.
Concrete Densification: Reacts with free lime (calcium hydroxide) in concrete to form calcium-silicate-hydrate (C-S-H), permanently hardening and dust-proofing surfaces.
Corrosion Inhibition: Forms a thin, protective passivating film on metal surfaces in water treatment and cooling systems.
Chemical Inertness: Once cured, it is resistant to heat (up to 1100°C), acids, and organic solvents, making it ideal for refractory applications.
4. Industrial Applications
Detergent & Cleaning Products: A key raw material in laundry powders, automatic dishwasher detergents, and industrial degreasers.
Corrugated Board & Packaging: High-speed laminating adhesive for paper and cardboard.
Foundry & Investment Casting: A binder for sand to create precision molds for metal casting.
Construction: Concrete sealer, soil grouting for stabilization, and tile adhesive additive.
Water Treatment: A corrosion inhibitor and sequestering agent for municipal water systems.
5. Safety & Handling
MSDS: This product is a strong alkaline liquid. Full MSDS is available upon request from Arnico support.
Storage Conditions: Store in closed HDPE or stainless steel (SS316) containers. Keep away from acids and aluminum. Prevent freezing (crystallizes below 5°C); gently warm to redissolve.
Personal Protective Equipment (PPE): Causes severe eye and skin irritation. The use of chemical splash goggles, rubber gloves, and a protective apron is mandatory.
6. Quality Assurance & COA
Arnico provides a dedicated Certificate of Analysis (COA) for each shipment, guaranteeing the exact weight ratio, viscosity, and total solids content required for your specific process.
