Fosroc Brushbond RFX is a high-performance, water-based bonding agent specifically formulated to improve the adhesion between existing concrete surfaces and new overlays, renders, or repairs. Engineered for both industrial and commercial applications, Brushbond RFX ensures a strong, durable bond, minimizes the risk of delamination, and provides long-lasting performance under varying environmental conditions. Its superior formulation allows it to penetrate concrete surfaces, fill micro-cracks, and create a cohesive interface that enhances the overall structural integrity of concrete repairs.
Chemical Composition & Physical Characteristics
Brushbond RFX is a polymer-modified acrylic-based emulsion with high solid content, designed for waterborne application. It is non-toxic, non-flammable, and easy to handle on-site. The product is delivered as a milky-white liquid that forms a thin, tacky film when applied, which promotes adhesion with freshly placed concrete or cementitious mortars. Its water-based nature ensures low VOC emissions, making it environmentally friendly and suitable for indoor and outdoor applications.
Functional Benefits
Enhanced Adhesion: Brushbond RFX forms a strong chemical and mechanical bond with both old and new concrete, reducing the risk of cracking, spalling, or detachment in overlays.
Crack Bridging: The polymer emulsion helps bridge minor surface cracks and voids, ensuring uniform stress transfer and structural cohesion.
Compatibility: Fully compatible with cementitious mortars, renders, micro-concretes, and polymer-modified screeds, ensuring versatile applications.
Durability: Resistant to weathering, water penetration, and chemical attack, Brushbond RFX prolongs the lifespan of repairs and overlays.
Ease of Application: Can be applied with a brush, roller, or spray, allowing precise coverage on horizontal, vertical, and overhead surfaces.
Applications
Concrete Repair: Ideal for structural and non-structural repairs on slabs, beams, columns, and walls, enhancing bond strength between repair mortars and substrates.
Renders and Overlays: Suitable for decorative or protective renders, industrial flooring overlays, and waterproofing screeds.
Industrial Flooring: Provides adhesion in high-performance flooring systems where bonding and durability are critical.
Waterproofing Systems: Can be used as a primer in cementitious waterproofing layers, ensuring proper bonding with concrete substrates.
Precast Concrete: Facilitates reliable adhesion in precast elements, repair joints, and modular concrete assemblies.
Technical Performance
Brushbond RFX demonstrates excellent water retention, allowing cementitious overlays to cure effectively and reduce shrinkage-related cracking. Its polymer modification improves flexural strength, tensile adhesion, and surface cohesion, making it suitable for demanding environments, including heavy traffic areas, industrial plants, and exposed structures.
Application Guidelines
Surface Preparation: Ensure the substrate is clean, sound, and free from dust, laitance, oil, or loose particles. Roughening smooth concrete surfaces improves mechanical bonding.
Mixing: Brushbond RFX is ready-to-use but can be diluted with clean water (as per project specifications) to adjust viscosity for brush or spray applications.
Application: Apply a uniform coat over the prepared surface using a brush, roller, or spray. Allow the primer to become tacky before placing fresh concrete or mortar.
Overlay Placement: Apply repair mortars or renders while the bonding coat is still tacky to ensure maximum adhesion.
Advantages
High-performance bonding for concrete overlays and repairs
Reduces delamination and spalling
Water-based, low VOC, environmentally friendly
Excellent chemical and weather resistance
Versatile for horizontal, vertical, and overhead applications
Compatible with a wide range of cementitious materials
Storage & Handling
Store Fosroc Brushbond RFX in a cool, dry place, protected from frost and direct sunlight. Keep containers tightly closed when not in use. The product should be used within the recommended shelf life to ensure consistent performance. Standard safety precautions such as gloves and eye protection should be observed during application.
Conclusion
Fosroc Brushbond RFX is a reliable, high-quality concrete bonding agent that significantly enhances adhesion, structural integrity, and durability in concrete repair and overlay projects. Its polymer-modified, water-based formulation ensures ease of use, excellent bonding properties, and long-term performance under diverse conditions. Widely trusted in industrial, commercial, and infrastructural applications, Brushbond RFX provides contractors, engineers, and builders with a dependable solution for high-quality concrete adhesion and repair.