To fix a leaking foundation crack from the inside, the most professional and effective method is epoxy injection. This technique is specifically designed for non-moving structural cracks caused by concrete shrinkage, minor settlement, or thermal changes.

The process involves the following steps:

1. Surface Preparation: Technicians prepare the crack surface and install small injection ports at regular intervals.
2. Surface Sealing: A specialized epoxy paste is applied over the crack to ensure the injected resin does not leak out during the process.
3. Resin Injection: Once the seal cures, a two-part epoxy resin is pumped into the ports under low pressure. The process starts at the lowest point and moves upward until the entire crack is filled.

Benefits of this method include:

• Structural Restoration: It bonds the concrete back together, restoring its original strength.
• Watertight Seal: It creates a permanent barrier against moisture and soil gases.
• Minimal Disruption: The application is low-impact and causes little disturbance to finished interior spaces.

For a comprehensive solution, this repair is often paired with interior perimeter drain installation and basement moisture barrier solutions to manage overall hydrostatic pressure and vapor transmission.