Crack injection is a structural repair solution used to restore the integrity of concrete structures. It involves injecting high-quality liquid epoxy resin into cracks that have been caused by stress. This method of repair is much easier than digging or draining tiles, and it can be done with low-pressure injection of epoxy or polyurethane foam materials. Engineers have been looking for ways to inject repair polymers into cracked concrete structures for many years.
The general consensus is to seal the crack with a sacrificial epoxy and install injection ports every few centimeters. Thick epoxy is then injected at high pressure into the crack with expensive resin injection pumps. This process is slow, costly, and requires a high level of skill, making it not very effective in the field. Once cured, the repaired concrete cracks will be two to three times stronger than the original concrete, ensuring a durable and long-lasting crack repair solution.
The system can be used to stop water jet, seal minor leaks, restore structural integrity, and waterproof and strengthen almost any concrete or masonry structure from the positive or negative side, below level, above level and underwater. Its low viscosity allows good penetration into the concrete structure to seal leaks and achieve a durable elastic seal. A spring-assisted dispensing tool allows complete control of injection pressures to keep them between 20 and 40 psi, the best range for complete crack filling. Repairs are structural in nature and will move with concrete, not against it like very hard epoxies. Using low-pressure crack injection, foundation and basement crack repair kits seal basement cracks from the inside, eliminating the need to dig the ground from the outside of the foundation.
But in some cases, you may need to follow other corrective measures, along with crack sealing, to ensure a complete solution. Epoxy resins for crack injection are available in a range of viscosities, from ultrafine to pasty, to accommodate cracks of different widths. Polyurethane foaming resins are designed to expand with water to temporarily block the passage of water through the crack or vacuum. They are now widely used for structural injection to seal cracks, gaps and non-moving construction joints.