Smaller Holes– 5/8th inch for polyurethane versus 2 inches or greater for cement grout (Mud Jacking). The significantly smaller size of the hole, (roughly the diameter of a dime) means the injection locations are far less visible than a mud jacking repair.
Light Weight –The polyurethane material is extremely lightweight yet very strong. The cement grout, (or “Mud”), is very heavy (like more concrete) which adds to the load burden which the subgrade needs to support. Because the subgrade has already sunk, any additional loading could cause the subgrade to fall further, even after the repair.
Hydrophobic –Polyurethane does not deteriorate in the presence of water. Water cannot wash it away, dissolve it, or weaken the material over time. Water cannot penetrate the material and then affect it during freeze and thaw cycles.
Set-Up and Cure Time –Due to the reaction between the A&B components of the polyurethane during the injection process, the material expands and sets up literally in seconds. It cures very quickly and is ready to support vehicular or other types of loads almost immediately.