Potassium Silicate Solutions


Generally, potassium silicates and sodium silicates share similar performance properties. However, in certain applications, there are a number of performance advantage of potassium silicate over sodium silicates.

Sodium silicates tend to react with atmospheric carbon dioxide to form carbonates and become progressively less water-soluble. Potassium silicate films are less likely than sodium silicate to develope a carbonate bloom or white efflorescent coat of alkali carbonate. Potassium silicate solutions are not as sticky or tacky as sodium silicate solutions, therefore easier to handle and use. The molar ratio is calculated as follows:

Molar ratio = [Weight ratio of SiO2/ K2O] × 1.568


Cleaning compounds

Welding rods

Television tubes

Coating and mortars

Refractory and chemical resistant mortars


Product Specifications
Unit PS-C100 PS-C200 PS-C300 PS-P100 PS-C42
pH 11-12 11-12 11-12 11-12 12-13
Specific gravity at (20±1)℃ 1.270-1.290 1.380-1.400 1.320-1.340 1.180-1.200 1.400-1.500
K2O wt% 10-11 13-14 10.5-11.5 5.5-6.5 18-19
SiO2 wt% 21.5-22.5 27.5-28.5 23.5-24.5 17.5-18.5 23-25
Molar ratio 3.1-3.3 3.1-3.3 3.4-3.6 4.6-4.8 2.0-2.2
Viscosity at (20±1)℃ cps Max. 20 Max. 50 Max. 50 Max. 20 Max. 50

Safety Information

Read the Material Safety Data Sheet before handling and using.

Do not freeze. Keep closed container.

Use personal protective clothing, gloves and chemical goggles.

Do not breathe spray mist. Do not taste or swallow.

Wash thoroughly after handling.

Promptly clean up spills or contaminated clothing with water.