Water leaking around pipe intrusions can be stopped with polyurethane grout. In this instance, a hole was drilled at an angle to reach the annular space in-between the pipe and the concrete. SealGuard II, a dual component polyurethane grout, requires a static mixer to mix properly. The mixer gets inserted into the drilled hole, then the grout is injected by using a dual caulking gun. SealGuard II reacts within a few seconds, creating a rigid foam, which seals off the flow.