Structural Crack Repairs

In instances where cracks in concrete compromise the structure’s integrity, it is recommended that these be repaired using epoxy. Epoxy has high compressive strength and bonds well with the substrate to produce a repair that is as strong, or stronger, than the original concrete. Prior to repairing structural cracks however, it is important that the causes of cracking be investigated and repaired in order to stabilise any movement and prevent new cracks from occurring in the same area. SlabJacker therefore, always recommends consulting a structural engineer before undertaking these types of work.

There are many different types of epoxy resin, paste, and mortar available on the market that allow for the product to be installed in almost any situation and environment.

Conditions allowing, our favoured method of epoxy crack repair is by pressure injection, as this ensures maximum penetration into the crack. Where cracks occur in horizontal surfaces, or it is not possible to fully contain resin within the crack during cure, it may be preferable to gravity feed the resin or apply the epoxy as a paste.

Epoxy is not only suitable for crack repairs, but is also an excellent means of bonding any bordering or laminated sections of concrete, or steel; and its high compressive strength makes epoxy ideal to bear the weight of heavy machinery and structural members.

Benefits of Epoxy

  • Effectively welds separated sections of concrete and steel.
  • Great compressive strength
  • Can repair cracks as tight as 0.05mm.
  • Forms a water tight seal.
  • Protects the reinforcement steel and helps prevent spalling.



• Structural repair of dormant cracks in floors, walls, ceilings, soffits, beams, and columns.

• Bonding and sealing of delaminated slabs.

• Bonding cold joints between concrete pours.

• As a bearing pad for heavy and vibrating machinery.

• Bonding and sealing the interface between steel and concrete.

• Concrete joint profile and surface repairs.



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