Crack Injection Structural cracks are repaired by filling the cracks with a high strength epoxy injection resin that bonds fractured concrete back together. The most appropriate crack injection resin is determined by the width of the crack and its location.
Lower viscosity epoxy resins are best for filling narrow cracks— higher viscosity epoxy resins are better for filling wide cracks. Vertical or overhead cracks usually require sealing the surface with an epoxy gel to insure that the resin doesn’t run out before it cures. Some cracks in horizontal surfaces can be filled by gravity feeding epoxy into the cracks.
Epoxies are used for structural repair of concrete foundation cracks and to stop water from entering these cracks. The cured epoxy resin will completely fill the concrete crack and return the basement wall to its previous strength. ECP recommends that a professional engineer inspects and diagnoses all concrete cracks before any repairs are performed. Failure to properly repair basement wall cracks can lead to foundation failure and basement flooding.
Polyurethane resins are used many times for actively leaking basement wall cracks. These resins do not provide structural strength but remain flexible and expand to seal large voids.
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