RLA Penapatch HB80 is a high-strength, high-build, shrinkage-compensated structural repair mortar for vertical, overhead and horizontal reinstatement. Its polymer-modified cementitious formulation is designed to bond strongly to concrete and compatible masonry while providing low permeability, high abrasion resistance and long-term dimensional stability.
RLA specifies high-build repair applications from approximately 5mm to 80mm on vertical surfaces. Localised vertical builds may extend further in small pockets or with formwork, and horizontal repairs may be placed deeper where the current technical data permits. This makes HB80 the heavier-duty Penapatch option when the repair section is substantial or service demands are high.
Remove unsound concrete, laitance and contamination and expose a solid repair edge. Prepare corroded reinforcement and use the RLA repair-system primer or steel treatment where required by the specification. Mix with clean water only, apply to the prepared substrate and compact thoroughly around reinforcement and into the repair profile.
Compare the range: For lighter repairs or finishing work, compare HB50, Panel LW and Fairing Coat in Masonry Repair Mortars. For concrete-only selection, see Concrete Repair Mortars.
What is Penapatch HB80 used for?
High-strength structural concrete repair on vertical, horizontal and overhead surfaces.
How thick can it be applied?
Typical vertical build is 5–80mm, with deeper localised or formed repairs and up to 180mm on horizontal surfaces where the RLA system permits.
Can it repair spalled concrete around corroded reinforcement?
Yes, with the specified steel preparation and RLA repair system.
Can it be used externally?
Yes, for suitable internal and external concrete repair applications.
| Property | Value |
|---|---|
| Density | 2240 kg/m³ |
| Yield per 20kg Bag | 10.5 litres |
| Bags per Cubic Metre | 95 |
| Application Temperature | Min 5ºC - Max 35ºC |
| Coverage | 2.2 Kg/m²/mm |
| Mixing Ratio | 3.6 litres |
| Flexural Strength 1 Day | 5.5 MPa (AS 1012-11-2000) |
| Flexural Strength 7 Days | 9 MPa (AS 1012-11-2000) |
| Flexural Strength | 10 MPa (AS 1012-11-2000) |
| Compressive Strength 1 Day | 24 MPa (AS 1478.2-2005) |
| Compressive Strength 7 Days | 52 MPa (AS 1478.2-2005) |
| Compressive Strength | 68 MPa (AS 1478.2-2005) |
| Initial Set Time | 1.5 hours (at 20°C) |
| Final Set Time | 2.5 hours (at 20°C) |
| Modulus | approximately 26 GPa |
| Co-efficient of Thermal Expansion | 7-10 x 10⁻⁶/ºC |
| Drying Shrinkage 7 Days | < 100 micro-strain |
| Drying Shrinkage 28 Days | < 350 micro-strain |
| Drying Shrinkage 56 Days | < 450 micro-strain |
| Abrasion Resistance Wear Index 28 Days | 120 (ASTM CS01-1984) |
| Horizontal Application Thickness Min | 10mm |
| Horizontal Application Thickness Max | 180mm |
| Vertical Application Thickness Min | 5mm |
| Vertical Application Thickness Max | 100mm |
| Wet Density | 2240 kg/m³ |
Here are some common examples on where RLA Penapatch HB80 Mortar used by our customers.
