Description Product Overview ARDEX RA 56 is a two-component, ultra-low viscosity hybrid polyurethane adhesive designed for rapid crack and spall repair in concrete substrates. Its fluid consistency allows deep penetration into hairline cracks, delivering strong structural bonding and long-term durability. Developed for projects where downtime must be minimised, it provides extremely fast curing performance, allowing areas to be opened to traffic in a short timeframe. When combined with dry aggregate, it can also be used as a repair mortar for spalled or damaged concrete areas. ARDEX RA 56 is suitable for both internal and external applications, providing a versatile solution for structural and cosmetic repairs. Key Features Ultra-low viscosity for deep crack penetration Rapid curing – trafficable in less than 20 minutes Full traffic load achievable in approximately 60 minutes Two-component hybrid polyurethane system Cures stronger than concrete Suitable for crack injection and spall repair Can be mixed with aggregate for mortar repairs Internal and external application capability Applications Repair of hairline and fine cracks in concrete slabs Spall repair when mixed with dry aggregate Industrial and commercial concrete floor repairs Warehouse and high-traffic flooring environments Rapid repair where minimal downtime is required Internal and external concrete repair projects Notes Mix two components thoroughly prior to application Apply via gravity feed or injection depending on crack type For spall repair, mix with suitable dry aggregate Ensure cracks are clean and free of debris before application Working time: Not specified by manufacturer Trafficable in less than 20 minutes depending on conditions Allow full cure before grinding or finishing Technical Information Technical Specifications: Type Two-component hybrid polyurethane adhesive Viscosity Ultra-low viscosity Function Crack injection and spall repair Traffic Time Less than 20 minutes (site dependent) Full Traffic Load Approx. 60 minutes Substrates Concrete Location Internal and external Application Method Injection, gravity feed, or trowel (with aggregate) Colour Grey Packaging 254mL cartridge, 600mL cartridge, 4L kit This repair system is designed for high-speed concrete repairs where immediate return to service is critical. Its rapid cure and deep penetration make it suitable for structural crack repair and surface restoration in demanding environments.
