There is no warranty with mudjacking and it adds a great deal of weight to already sinking soil, we instead recommend PolyLevel or slab piers to solve sinking concrete. Both of these come with guarantees. PolyLevel has a 5 year guarantee while Slab Piers have a 25 year guarantee. The installation process with PolyLevel is very quick whereas the installation of slab piers can be lengthy and labor intensive. There are many options available, please contact us and we will give you a free, no obligation inspection.