Step 6 - Fill Cracks with Liquid Urethane Inject liquid urethane directly into the crack or cracks. As the urethane is injected, it begins to foam and expand to completely fill the inside of the crack. It also makes the crack moisture proof, preventing water from seeping into the crack at...
the same blistering of paint and plaster may be apparent,” he says. “If the concrete or masonry foundation walls are exposed without furred-out interior finishes, active water may be entering from the soil-side within cracks or joints. After the active water evaporates, stains and efflorescenc...