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Use RLA Fairing Coat Mortar for: Surface repairs, defect smoothing, and thin-layer concrete finishing on vertical or overhead areas
Fairing Coat Mortar is a fine-textured, fast-setting cementitious compound designed for professional concrete repairs where only a thin coat is required. Formulated with a specialised blend of cement and polymers, it offers outstanding adhesion, durability, and smooth finish without shrinkage. Ideal for vertical applications, patching, or preparing surfaces for coatings, this Australian-made product simplifies surface refinishing on-site. It’s suitable for both internal and external use, whether as a top coat or standalone repair layer.
Key Features of RLA Fairing Coat Mortar
- Fast-setting formulation ensures rapid project turnaround
- Excellent adhesion to concrete and masonry surfaces
- Smooth, fine-textured finish ready for coating or exposure
- Can be feathered and applied up to 5mm in one pass
- Negligible shrinkage reduces risk of cracking or surface flaws
- Internal and external suitability with durable, long-lasting performance
Technical Overview
- Chemical Properties: Cementitious with polymer additives
- Application Temperature Range: 5°C to 35°C (41°F to 95°F)
- Wet Density: 1800 kg/m³
- Yield: 14 litres per 20kg bag
- Compressive Strength: 20 MPa at 28 days
- Flexural Strength: 7.1 MPa at 28 days
- Drying Shrinkage: <450 microstrain at 56 days
- Initial Set Time: 25 minutes at 20°C
- Final Set Time: 50 minutes at 20°C
Trade Professional Information
- Required Tools: Forced-action mixer, suitable mixing paddle, trowel
- Trade-Specific Tips: Use chilled water in hot conditions to extend workability and pre-soak substrates for maximum bond
- Common Issues and Solutions: For highly porous surfaces, use RLA RenderGrip A to prevent flash drying
Storage and Shelf Life
- Storage Requirements: Store in dry areas, off cold floors, away from direct sunlight
- Shelf Life Information: 12 months from date of manufacture
- Temperature Considerations: Keep in room-temperature environments between 5°C and 25°C
Certifications
- Complies with AS1012, AS2073 and ASTM C348-86 standards
- Meets Australian conditions for concrete surface repair compounds
- Manufactured to Australian regulatory safety and quality standards
Frequently Asked Questions About RLA Penapatch Panel LW – Repair Mortar
Q: How do I apply the product to vertical surfaces?
A: Use a steel trowel or gloved hand to apply Penapatch Panel LW to the substrate. Thoroughly compact the mortar and finish with a steel trowel. Ensure minimum 5mm thickness is maintained and avoid overworking the surface.
Q: How strong is the mortar once cured?
A: At 28 days, Penapatch Panel LW achieves a compressive strength of 20 MPa and a flexural strength of 7.1 MPa, making it suitable for non-structural repairs in commercial and industrial applications.
Q: Is this mortar compatible with existing coatings?
A: Yes, it's compatible with RLA protective and decorative coatings. Ensure the surface is clean and properly cured before applying coatings or renders for best adhesion.
Q: What should I do if the mortar sets too quickly?
A: In hot or windy conditions, premature drying can occur. Use chilled water for mixing and apply RLA RENDERGRIP A as a curing aid. Avoid reworking the mix once it has begun to set.
Q: Are there any special disposal or safety requirements?
A: Dispose of any uncured product according to local regulations. Always wear gloves, eye protection, and ensure proper ventilation during application. Refer to the SDS for full safety details.
Use RLA Penapatch Panel LW – Repair Mortar for:
- Patching and covering metal joiner plates in precast tilt-up construction
- Vertical surface repairs up to 50mm and overhead builds up to 100mm
- High-build fairing coats for cosmetic concrete restoration
- Prepping concrete surfaces before painting or rendering
Why Use RLA Penapatch Panel LW – Repair Mortar:
- Eliminates formwork for vertical and overhead applications
- Fast drying with a smooth finish ready for coating
- Reduces risk of shrinkage cracking with shrinkage-compensated formula
- Fire-rated performance suitable for compliant builds
How to apply RLA Penapatch Panel LW – Repair Mortar:
- Clean surface of contaminants like oil, paint, and dust
- Pre-soak substrate with water (avoid pooling) or use RLA RENDERGRIP A for porous surfaces
- Mix 3.1–3.6L of water per 10kg bag using a high-shear spiral mixer
- Add powder to water while mixing to avoid lumps
- Apply with trowel or gloved hand, compacting thoroughly
- Finish with a steel trowel for smooth texture
- Apply RLA RENDERGRIP A over finished areas in hot or windy conditions for curing
RLA Penapatch Panel LW – Repair Mortar limitations:
- Not suitable for load-bearing or structural repairs
- Not designed for pedestrian or vehicle traffic surfaces
- Must not be applied thinner than 5mm except for minor feather edges
- Excessive water during mixing reduces strength and increases drying time
- Reflective cracking may occur if underlying substrate cracks or moves
Safety precautions when using RLA Penapatch Panel LW – Repair Mortar:
- Personal Protective Equipment: Wear gloves, eye protection, and a dust mask when mixing or sanding
- Ventilation: Ensure adequate airflow in enclosed spaces
- Handling: Mix only what can be applied within the working time; do not re-temper
- Refer to the product SDS for detailed safety and first aid information
RLA Penapatch Panel LW – Repair Mortar can be used on the following substrates:
- Concrete – Ensure surface is clean and mechanically keyed
- Precast Panels – Ideal for tilt-up construction and joint plate coverage
- Masonry – Requires pre-soaking and priming if porous
- Steel Reinforcement – Must be cleaned and primed with RLA Zinc Primer
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