Polyurethane foam injection is a process used to fill voids or cracks in various surfaces, such as concrete or soil. This technique involves injecting a liquid polyurethane mixture that expands and hardens upon contact, creating a solid structure that supports and stabilizes the area. It is commonly used in construction and repair projects to address issues like settling foundations or water leaks. The benefits of polyurethane foam injection include its quick curing time and minimal disruption to the surrounding environment. This method is often preferred over traditional repair techniques because it is lightweight, durable, and can be applied in hard-to-reach areas without extensive excavation.