Exploring the Lesser-Known Uses of Sodium Silicate (Water Glass)

When it comes to "glass water" (windshield washer fluid), drivers are very familiar with it. However, fewer people know about "sodium silicate" (water glass), and some might even wonder: Is water glass a type of "water-based glass"? Actually, no. Sodium silicate is an aqueous solution of sodium metasilicate, also known as "water glass" or "alkaline silicate." It is an exceptional industrial chemical material with a wide range of applications. Today, let’s explore some of the lesser-known uses of sodium silicate.

1. Powerful Weather Resistance

When applying coatings, workers often dissolve sodium silicate into pigments. During the painting process, the sodium silicate seals all tiny pores that might allow wind penetration, making it particularly suitable for windy regions. Due to its high density, sodium silicate also increases the surface density of the coated material. Even during typhoons, buildings treated this way remain minimally affected.

2. A Great Helper for Soil Stabilization

To construct a stable building, a solid foundation is essential. Workers typically mix sodium silicate and calcium chloride solutions in a specific ratio. Once fully blended, the mixture is poured into the excavated foundation trenches. This process effectively stabilizes the soil, ensuring a sturdy base for construction.

3. Repairing Cracks in Brick Walls

Over time, brick walls often develop cracks. To fix these, sodium silicate can be mixed with slag (industrial byproduct) in an appropriate ratio. It’s crucial to avoid adding too much water during mixing, as excess water reduces the viscosity of the solution. The sodium silicate-enhanced mixture not only repairs cracks effectively but also strengthens the structure through its hardening properties.