Concria Oy · Now in the US
The Future of Concrete Floors
Starts at Placement
Dry-shake hardeners and nano-silica densifiers that eliminate liquid hardener applications, reduce callbacks, and deliver floors that perform from day one.
Pure White Concrete Floors
Data centers want them. Grocery chains are asking for them. Now you can get a true white concrete floor — not a coating, not paint, but the concrete itself. Optimal Slab Deco in pure white delivers the bright, clean aesthetic that high-end facilities demand, with the same 50+ year durability as our industrial system.
- ✓ Pure white — not a coating that yellows or peels
- ✓ 10 standard colors + terrazzo looks + custom RAL matching
- ✓ Same Optimal Slab performance — 10,800 PSI, dust-free, 50+ years
Two Products. Zero Liquid Hardener.
A complete flooring system applied during placement — not after. Less labor, faster schedules, better floors.
Optimal Slab
Patented dry-shake surface hardener applied at placement. Eliminates the need for liquid hardener/densifier application, curing compounds, and sealer coats on standard industrial floors.
- ✓ Industrial and decorative grades
- ✓ Integral hardening + densifying + curing
- ✓ Walk-on ready in 24 hours
Trowel Hard
Nano-silica densifier applied during troweling. Penetrates deeply into fresh concrete for maximum densification — far beyond what topical liquid hardeners can achieve on cured surfaces.
- ✓ Applied during power troweling
- ✓ Nano-silica particle technology
- ✓ Superior abrasion resistance (AR0.5)
Built for the Floors That Matter Most
High-performance concrete floors for the industries where downtime isn't an option.
Why Not Just Use a Liquid Hardener?
Traditional liquid hardeners are applied after the floor cures. Concria products work during placement — and that changes everything.
| Concria System | Liquid Hardener | |
|---|---|---|
| Application timing | During placement | Days/weeks after cure |
| Penetration depth | Full slab depth | Surface only (1-2mm) |
| Additional site visits | None — done at pour | 2-3 return trips |
| Curing compound needed | No — built in | Yes — separate step |
| Dust-proofing | Immediate | Delayed until applied |
| Abrasion resistance | AR0.5 achievable | AR1-AR2 typical |
| Carbon footprint | Lower — fewer materials | Higher — more products + trips |
See the Specs Behind the Claim
Download the Optimal Slab technical data sheet — test results, application rates, performance specs, and low-carbon cement compatibility data.
40+ Countries
Global Track Record
Installed across 40+ countries — Europe, Asia, and now the United States.
15+ Years
Finnish Innovation
Developed in Finland with 15+ years of R&D and field testing.
Patented
Patented Technology
Protected dry-shake and nano-silica formulations.
US-Wide
US Distribution
Nationwide availability through CCS.
Frequently Asked Questions
What is Optimal Slab? +
Optimal Slab is a patented dry-shake hardener system applied during concrete placement. It combines hardening, densifying, and curing in a single application — eliminating the need for liquid hardeners, curing compounds, and return trips.
How is Concria different from liquid hardeners? +
Traditional liquid densifiers are applied after the concrete cures and only penetrate 1–3mm of the surface. Concria products are applied during placement, penetrating the full slab depth for a complete, permanent reaction with the cement.
What industries use Concria floors? +
Concria floors are used in data centers, logistics and distribution warehouses, grocery and retail stores, automotive manufacturing, education facilities, and other high-performance environments.
Is Concria compatible with low-carbon cement? +
Yes. Optimal Slab is specifically designed for Type 1L (CEM III) low-carbon cements, where traditional dry shakes and liquid hardeners often fail or underperform.
How fast can a Concria floor be polished? +
Concria floors are polish-ready in 7 days after placement, compared to 28 days for traditional methods. This dramatically accelerates project schedules.
What is the lifespan of an Optimal Slab floor? +
Optimal Slab floors last 50+ years with polish-only maintenance, compared to 3–5 years for epoxy coatings that require full strip-and-recoat cycles.