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Use RLA Penapatch HB80 for: Structural concrete repairs needing high compressive strength, dimensional stability, and strong adhesion.
RLA Penapatch HB80 is a high build, high strength polymer-modified repair mortar engineered for structural restoration of vertical, overhead, and horizontal concrete surfaces. It is shrinkage-compensated and highly abrasion-resistant, offering excellent bond strength to concrete and masonry. Ideal for addressing spalled concrete, reinforcement corrosion, and structural degradation, Penapatch HB80 enables single-application builds up to 180mm on horizontal surfaces. This Australian-made solution eliminates the need for formwork and suits both dry and wet spray applications.
Key Features of RLA Penapatch HB80
- High compressive strength up to 68 MPa for structural durability
- Single-application high build up to 180mm horizontally, 100mm vertically
- Tenacious adhesion to concrete and masonry surfaces
- Low permeability protects against chlorides and carbonation
- Excellent abrasion resistance and dimensional stability
- Pre-bagged and easy to mix – just add water
Technical Overview
- Chemical Properties: Polymer-modified cementitious blend
- Application Temperature Range: 5°C to 35°C (41°F to 95°F)
- Compressive Strength: Up to 68 MPa (28 days)
- Flexural Strength: 10 MPa (28 days)
- Young’s Modulus: Approx. 26 GPa
- Abrasion Resistance: Wear Index 120 (ASTM C501)
- Water Requirement: 3.6 L per 20kg bag
- Yield: 10.5 L per 20kg bag
Trade Professional Information
- Required Tools: Spiral mixing paddle, forced action mixer, trowel, spray pump (wet spray)
- Trade-Specific Tips: Use RLA RenderGrip A or Epilox Binder depending on substrate moisture. Avoid feather edging under 5mm.
- Common Issues and Solutions: Slumping occurs with excessive water or overly wet primer—always mix with precision and monitor substrate condition.
Storage and Shelf Life
- Storage Requirements: Dry area, off cold floors, away from direct sunlight
- Shelf Life Information: 12 months in unopened packaging
- Temperature Considerations: Store between 5°C and 25°C (41°F–77°F)
Certifications
- Tested to AS1478.2-2005 for compressive strength
- Complies with AS1012.11-2000 for flexural strength
- Meets Australian concrete repair guidelines
Frequently Asked Questions About RLA Penapatch HB80
Q: How do I apply RLA Penapatch HB80 to vertical or overhead surfaces?
A: Apply using a trowel or gloved hand after priming the surface with RLA RenderGrip A. For thicker vertical repairs, use multiple layers or formwork for builds over 100mm.
Q: What is the compressive strength of this product?
A: RLA Penapatch HB80 achieves 24 MPa in 1 day, 52 MPa in 7 days, and 68 MPa in 28 days, ensuring high structural integrity for demanding repair jobs.
Q: Is it compatible with reinforcement bars and concrete surfaces?
A: Yes, it bonds strongly to concrete and masonry and can be used around cleaned and primed steel reinforcement using RLA Zinc Rich Primer.
Q: What can I do if the product starts to slump during application?
A: Slumping is usually caused by excessive water or wet primer. Ensure no more than 3.6 L of water per 20kg bag and that primer is tacky—not wet—before applying.
Q: What safety precautions should I take during application?
A: Wear gloves, eye protection, and a dust mask. Use adequate ventilation during mixing and avoid skin or eye contact. Refer to the SDS for complete guidance.
Use RLA Penapatch HB80 for:
- High build repairs to concrete columns, beams, and soffits
- Repairing spalled or corroded concrete with exposed rebar
- Structural repairs requiring dimensional stability and high strength
- Overhead repairs in infrastructure, tunnels, and industrial settings
Why Use RLA Penapatch HB80:
- Ensures long-lasting structural repairs with compressive strength up to 68 MPa
- Minimises labour costs with high build capacity in a single application
- Reduces moisture ingress with low permeability and abrasion resistance
- Eliminates mixing errors with pre-bagged, easy-to-use formulation
How to apply RLA Penapatch HB80:
- Prepare the substrate by removing oil, dust, laitance, and loose material.
- Prime surface using RLA RenderGrip A or RLA Epilox Binder depending on moisture level.
- Mix 20kg of HB80 with exactly 3.6L of clean water using a spiral mixing paddle.
- Apply mortar by trowel or gloved hand, thoroughly compacting into surface and around steel reinforcement.
- Screed and finish with a steel trowel; avoid overworking the surface.
- For spray application, use a wet process pump system. Contact RLA for setup advice.
RLA Penapatch HB80 limitations:
- Do not apply at thicknesses below 5mm except in very localised areas.
- Product should not be applied when ambient temperature is below 5°C or above 35°C.
- Excess water will weaken strength and cause slumping—use only 3.6L per 20kg bag.
- Substrate movement may cause reflective cracking in applied repair mortar.
- Must not be exposed to water or rain for at least 24 hours post-application.
Safety precautions when using RLA Penapatch HB80:
- Personal Protective Equipment: Safety gloves, eye protection, dust mask (P2), and protective clothing
- Ventilation: Ensure adequate airflow during mixing and application, especially indoors
- Handling: Avoid skin and eye contact; do not breathe dust during mixing
- Dispose of hardened product as construction waste in accordance with local regulations
RLA Penapatch HB80 can be used on the following substrates:
- Concrete – requires clean, roughened surface and priming
- Masonry – ensure substrate is structurally sound and dust-free
- Steel reinforcement – must be cleaned and primed with Zinc Rich Primer
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