Waterproofing Injection Resins

Steel corrosion and concrete damage severely reduce the durability of concrete structures. Costly structural repairs are in many instances avoided by sealing and waterproofing leaks. Injection systems are also often used to restore the integrity and load-bearing capacity of structures. Waterproofing injection resins are used for the repair and sealing of cracks, voids, and joints of structures, in conformity with relevant industry standards. The effectiveness of injection systems is determined by the injection materials’ viscosity, flexibility, and behavior when in contact with water. It also depends on the injection equipment’s choice, dosage, mixing, pumping, and level of training, and on the experience of the contractor.

Products supplied by Holderchem include Polyurethane resins, which are hydrophobic and flexible, are used for non-structural injections to block water passage. To treat voids, cracks, and joints with high water ingress, polyurethane foaming resins are recommended as their fast expansive reaction forms a tough and elastic durable barrier. Acrylate resins are also used for non-structural injections. They deeply penetrate concrete structures as a result of their extremely low viscosity.

For structural injection works, in load-bearing reinforced concrete structures, epoxy resins with relatively high tensile, rigidity, and compressive strengths are used. Very fine cement suspensions are also used for structural repair works to seal non-moving cracks because of their easy penetration of concrete.