The answer to this question can vary depending on a few different factors. One of the primary considerations is how well the installation was done. The results should last years if the process was executed carefully and with attention to detail. Another critical factor is how much weight the concrete will need to support. Heavy loads can cause the concrete to shift, which could require an additional polyjacking injection. Overall, a well-done polyjacking repair should last many years and provide a safe and stable surface for residential and commercial spaces.