Effective concrete repairs need to reinstate the bond, strength and durability of the concrete while protecting reinforcement from further corrosion.
Sika offers a specialist range of bonding agents and corrosion protection slurries designed to support durable, long-lasting concrete repairs. These products help improve adhesion between repair mortars and concrete substrates, while providing protection to exposed reinforcement where required.
Whether used as a bonding layer between the existing concrete and repair mortar, or as corrosion protection for exposed steel reinforcement, Sika solutions provide a reliable foundation for concrete repair and refurbishment projects.
Bonding Agents for Concrete Repair
Bonding agents play a vital role in the success and longevity of concrete repair systems. When new repair mortars or overlays are applied directly onto existing concrete, the interface between the two materials can often be a point of weakness. Without a proper bond, differential movement, shrinkage, or surface contamination can lead to debonding, cracking, or premature failure of the repair.
A bonding agent helps overcome these challenges by forming a strong adhesive layer that unites the old and new concrete into a single, cohesive system. This ensures excellent adhesion, even under varying site conditions, and provides a consistent surface for the repair mortar to adhere to.
Whether used in structural repairs, patching, or resurfacing works, bonding primers are an essential step in creating durable, long-lasting concrete repairs that perform reliably over time.
Corrosion Protection Slurries
Corrosion protection slurries are a key component in extending the lifespan and integrity of reinforced concrete structures. Over time, exposure to moisture, chlorides, and carbon dioxide can cause the embedded steel reinforcement to corrode, leading to cracking, spalling, and a loss of structural strength. Once corrosion begins, it can accelerate rapidly, compromising the long-term performance of the repair and the surrounding concrete.
These slurries form a dense, protective barrier on the reinforcement surface, preventing chloride ingress and carbonation. Applied before repair mortars, they provide both active and passive protection by inhibiting corrosion processes and improving the bond between steel and concrete.
By safeguarding reinforcement at the earliest stage of repair, corrosion protection slurries help extend service life, reduce maintenance needs, and ensure long-term performance of concrete structures in demanding environments such as bridges, marine assets, and car parks
