Restoring damaged concrete surfaces to a sound, durable condition is critical, especially before applying membranes or finishes. RLA Penapatch HB50 provides a high-build, shrinkage-compensated solution for patching spalled concrete, vertical elements, and precast components. It re-establishes structural integrity and prepares the surface for subsequent layers.

Why this product exists

RLA Penapatch HB50 was formulated for robust concrete repair, addressing common issues like spalling around corroded reinforcement, and damage to vertical and overhead elements such as columns, beams, and soffits. It is also engineered for reinstating sharp edges and corners on precast panels. The product's design focuses on achieving high build without slump, while ensuring long-term durability, particularly in environments exposed to chlorides or carbonation.

The numbers that matter

This repair mortar allows for significant application thickness, facilitating build-ups of up to 80mm in a single pass on vertical and overhead surfaces. This high-build capability minimises the number of layers required for deep repairs, saving time on site. Its shrinkage-compensated formulation is designed to reduce cracking, which helps maintain crisp edges and prevents a common failure point for subsequent membrane or tile installations. The low permeability characteristic of Penapatch HB50 contributes to long-term durability by resisting ingress from aggressive agents like chlorides and carbon dioxide, crucial for infrastructure longevity.

What it's like to use

RLA Penapatch HB50 is designed for trowel application. Its thixotropic, non-slump consistency supports efficient high-build placement on vertical and overhead surfaces without sag, reducing rework and speeding up repair operations.

Where this product excels

RLA Penapatch HB50 is particularly effective for:

• Concrete — membrane covered, tiled: As a filler for damaged concrete surfaces before waterproofing membranes and tiling are applied, ensuring a level and sound substrate.
• Spalled concrete repairs: Reinstating deteriorated concrete around corroded reinforcement, offering a high bond and low permeability for enhanced durability.
• Vertical and overhead patching: Easily applied to columns, beams, and soffits due to its non-slump properties.
• Precast panel edge and corner reinstatement: Achieving sharp, durable edges with its shrinkage-compensated formulation.
• Durability repairs in infrastructure: Providing a protective barrier against chloride ingress and carbonation in critical assets.

How it fits in a real system

This product typically functions as a final step in comprehensive concrete repair systems. For example, in situations requiring robust concrete restoration, RLA Penapatch HB50 follows the application of an epoxy primer like Megapoxy H. This sequence ensures optimal adhesion and prepares the substrate for subsequent finishes or protective layers, especially when the area will be membrane-covered and tiled.

Choose this when

• When repairing spalled concrete or damaged elements in vertical or overhead positions.
• When reinstating damaged edges and corners on precast panels.
• When a durable, low-permeability repair is needed in areas exposed to chlorides or carbonation.
• When the concrete repair must be suitable for subsequent membrane and tile installation.

Don't use this when

• Not for: Lightweight concrete repairs; for these, consider RLA Penapatch Panel LW Concrete Repair.
• Not for: Underwater patching applications; for these, consider RLA UW Penaflow Grout.
• Not for: Balustrade grouting; for this, consider RLA Penatech HS Grout.
• Not for: Use as an elastomeric sealant in active movement joints, as it is a cementitious repair mortar without crack-bridging capability.
• Not for: Structural load transfer applications without project-specific engineering verification, as repair mortars have specific load-bearing limits.