Which condition is false regarding synthetic grout?

Synthetic grout is known for its ability to handle high temperatures, making the assertion that it cannot is incorrect. In fact, many synthetic grouts are formulated to remain effective in high-temperature environments, which is essential for applications in industrial settings where temperatures can rise significantly.

The other characteristics of synthetic grout highlight its practical limitations. The short usable time indicates that once mixed, the grout has a limited window for application before it begins to set, which requires careful planning during installation. Its limited shelf life reflects the nature of the materials used in synthetic grouts, often leading to decreased performance if stored beyond their recommended time. Lastly, being moisture sensitive means that exposure to moisture can adversely affect the grout's performance, necessitating careful handling and application conditions to ensure the best results.

In summary, the understanding of synthetic grout's properties emphasizes its utility in high-temperature applications, while also recognizing the practical challenges that come with its use.