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Provide unlimited possibilities for your polyurethane one-stop solution
Provide unlimited possibilities for your polyurethane one-stop solution
Two-component closed-cell slab-lifting polyurethane foam (HFC-245fa) for concrete raising and void filling. Free-rise density >=30 kg/m3, cream 4-6 s, gel 10-20 s, 1:1 ratio. Lifts driveways, floors, pool decks and industrial slabs in minutes. Supplied with TDS/MSDS and matched injection equipment.
Closed-Cell Slab-Lifting Polyurethane Foam (1801CC) is a two-component, spray / injection-applied closed-cell PU system premixed with HFC-245fa. Injected through small ports, it expands under settled concrete to fill voids, compact the soil and lift the slab back to level — fast, clean and far lighter than mudjacking. It cures with high compressive strength, water resistance and chemical / wear resistance for long-lasting structural support of driveways, floors, pool decks and industrial slabs.
Used for: driveways, sidewalks, garage & warehouse floors, pool decks, patios, factory slabs, road & airport pavement, and void filling under settled structures. Learn more in our slab jacking material guide. For thermal-insulation spray foam see our closed-cell insulation foam (SPC-10072).
| Item | Polyol (1801CC) | Isocyanate |
|---|---|---|
| Physical state | Transparent liquid | Brown liquid |
| Viscosity (25 °C) | 400–800 mPa·s | 150–250 mPa·s |
| Specific gravity (20 °C) | 1.15 ± 0.1 g/ml | 1.23–1.25 g/ml |
| Mix ratio (by weight) | 100 : 100 (polyol : polymeric MDI) | |
| Cream time | 4–6 s | |
| Gel time | 10–20 s | |
| Free-rise density | ≥ 30 kg/m³ | |
| Blowing agent | HFC-245fa (premixed) | |
| Cell structure | Closed cell | |
Two-component, spray / injection applied. Typical values for reference, not a binding specification.
| PU Foam (this) | Traditional Mudjacking | |
|---|---|---|
| Added weight | Very light (≥30 kg/m³) | Heavy slurry, can re-settle |
| Hole size | Small (~16 mm) | Large (~50 mm) |
| Cure / return to use | Minutes | Hours to a day |
| Water resistance | Closed-cell, waterproof | Can wash out |
Choose the blowing system that fits your market. The 100% water-blown grade is the eco, zero-ODP choice increasingly preferred in North America, Europe and other regions with HFC phase-down regulations — it is steadily replacing HFC-blown slab-lifting foam. The HFC-245fa grade (1801CC, described above) is still produced and remains available for markets without these restrictions.
| Property | Water-Blown (Eco) | HFC-245fa (1801CC) |
|---|---|---|
| Blowing agent | 100% water · zero ODP | HFC-245fa |
| Cell structure | Closed cell ≥ 90% (ASTM D6226) | Closed cell |
| Core / free-rise density | Core ≥ 40 kg/m³ (free-rise 35–45) | Free-rise ≥ 30 kg/m³ |
| Compressive strength | ≥ 200 kPa (ASTM D1621) | High load capacity |
| Compressive modulus | ≥ 8 MPa (ASTM D790) | — |
| Water absorption | ≤ 3% (ASTM C209) | Low (closed cell) |
| Cream / gel time | 3–5 s / 10–15 s | 4–6 s / 10–20 s |
| Mix ratio (polyol : MDI) | 100 : 100 | 100 : 100 |
| Thermal stability | ≤ 3% (−30–80 °C, ASTM D2126) | Dimensionally stable |
Both are two-component, injection-applied closed-cell systems for concrete lifting & void filling. Tell us your project and we recommend the grade. Typical values for reference, not a binding specification.
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