RLA Penapatch HB50 is a high-build, medium-weight, shrinkage-compensated structural repair mortar for damaged concrete and compatible masonry. It is designed for vertical, overhead and horizontal repairs where the section must be rebuilt with a high-strength, low-permeability mortar rather than a cosmetic patch.
HB50 is intended for high-build work, including vertical repairs from approximately 5mm to 80mm in normal applications. Greater localised builds may be possible in small pockets or with formwork where permitted by the current technical data. Its polymer-modified, shrinkage-compensated formulation is designed to maintain bond and dimensional stability through thicker repairs.
Break back all weak or delaminated concrete to sound material and provide a suitable mechanical key. Clean exposed reinforcement as required by the repair specification and use the RLA repair-system primer or reinforcement treatment where specified. Mix only with the stated quantity of clean water and compact the mortar firmly into the prepared repair area.
Compare the range: HB50 sits between fine fairing mortars and heavier high-strength repairs. See Masonry Repair Mortars or the broader Concrete Repair Mortars range.
What is Penapatch HB50 used for?
High-build structural repair of damaged or spalled concrete on vertical, horizontal and overhead surfaces.
How thick can it be applied vertically?
Typically 5–80mm in one application, with deeper small pockets possible where the RLA system permits it.
What compressive strength does it reach?
About 55MPa at 28 days.
How much water is used per 20kg bag?
About 3.0 litres.
| Property | Value |
|---|---|
| Base Chemistry | Polymer-modified, Fibre-reinforced cementitious mortar |
| Density | 2120 kg/m³ (approx.) |
| Compressive Strength | 1 day: 15 MPa, 7 days: 40 MPa, 28 days: 55 MPa |
| Flexural Strength | 1 day: 5 MPa, 7 days: 7 MPa, 28 days: 8.5 MPa |
| Shrinkage | Shrinkage compensated (dimensionally stable) |
| Application Temperature | Min $5^\circ\text{C}$ - Max $35^\circ\text{C}$ |
| Humidity Range | 5–80% |
| Water Vapour Transmission | Low (chloride and carbonation resistance) |
| Water Ratio | 3.0 L |
| Coverage Rate | ≈ 1.08 m² |
| Bed Thickness | Up to ~120 mm |
| Shelf Life | 12 months (unopened, Dry storage) |
| Coverage | 106 |
| Mixing Ratio | 3.0 litres |
| Wet Density | 2120 kg/m³ |
Here are some common examples on where RLA Penapatch HB50 Mortar used by our customers.
