A method that used to be common – and is even still in use today – mudjacking is also used to lift and stabilize concrete. However, it is not as easy or effective as a polyurethane injection, and it is better suited for use when lifting mostly undamaged concrete. Additional cons of mudjacking include a longer time to dry, susceptibility to erosion, and a need for larger holes that are more difficult to patch. Polyurethane, on the other hand, cures in about 15 minutes, and it will not be washed out under the concrete.