Hardening
C² Hard
Concrete hardener and densifier for floors, including dusting surfaces previously treated with sodium or potassium hardeners.
Why choose C²? →Stock availability
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When to choose this product
For fresh or existing absorbent concrete floors. Reacts within the pores to strengthen the surface, reduce dusting and make routine maintenance easier.
Product advantages
- A penetrating concrete surface hardener and densifier.
- Its patented lithium silicate formulation penetrates the concrete and reacts within its pores to harden and densify the surface.
- Also suitable for floors previously densified with sodium or potassium hardeners when the surface starts to dust or wear.
More advantages
- One-step application without scrubbing or flushing off the hardener, so no caustic wash water is produced.
- Reacts quickly inside concrete pores. Improves surface hardness, appearance and light reflection, while reducing the time and cost of diamond polishing.
- Treated floors are easier to maintain and need no waxing. Surface performance improves with use and appropriate maintenance.
- Does not absorb water or promote floor sweating. The TDS states that increased gloss and hardness do not reduce slip resistance.
- Breathable and UV-stable; does not yellow, peel or flake.
- Low odor and non-flammable according to the TDS. Follow the SDS for handling and personal protection.
Technical information
Typical technical data
| Appearance | Clear, colorless liquid |
|---|---|
| Specific gravity | 1.05 |
| pH | 11.0 |
| Active content | 6% |
| Total solids | 6% |
| VOC content | 0 g/L |
| Shelf life in a tightly sealed, unopened container | 2 years |
| Flash point | Not applicable |
Typical values from the manufacturer’s TDS; application details are in the full instructions.
Preparation and working conditions
Surface and air temperature4–38 °C
Remove dirt, grease, curing residues and coatings that block absorption. Leave the concrete clean, dry and absorbent; check uniform wetting with a light water spray.
Equipment
Use a low-pressure sprayer. Distribute evenly without puddles; avoid forming a fine mist.
A microfiber pad helps spread a thin, even coat. Use clean tools.
Practical advice
Test a representative area with the equipment and preparation planned for the job. Let it dry before assessing the result and coverage.
For extra gloss and protection, select C² Seal or C² Ultra Seal; for a natural appearance, C² Stain Safe or C² Protector. Follow the chosen protective treatment’s own instructions.
Clean tools with fresh water before the product dries. Immediately wash splashes off glass, aluminium and other adjacent surfaces.
Storage and handling
Storage temperature4–38 °C
Store upright in sealed original containers in a cool, dry place. Close after dispensing. Follow local rules for unused product and packaging.
Product at work
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