Potassium Silicate Concrete Surface Sealer
CAS Number: 1312-76-1
Potassium silicate solution is used as a penetrating concrete sealer and surface hardener. It reacts with calcium hydroxide in concrete to form insoluble potassium calcium silicate crystals, sealing pores and increasing surface hardness and abrasion resistance. Its high pH and reactivity make it slightly faster-acting than lithium silicate while still being more stable than sodium silicate. It is widely used for initial concrete floor densification prior to polishing.
Technical Specifications
| pH | 11.5-12.5 |
| appearance | Clear colorless to slightly hazy liquid |
| K2O content (%) | 8–12 |
| SiO2 content (%) | 20–26 |
| specific gravity | 1.25–1.30 |
Applications
- Initial densification step in polished concrete flooring
- Industrial floor surface hardening and dustproofing
- Concrete surface sealing before coating application
- Agricultural and food processing facility floors
- Road and bridge deck surface treatment
Key Features
- Faster initial reaction than lithium silicate on fresh concrete
- Produces insoluble reaction products for permanent densification
- More stable than sodium silicate with less risk of white residue
- Colorless application does not change concrete appearance
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