How do you choose the right hardener reactivity?

It is important not to choose a hardener that is too fast. If it is not applied within the allotted time, it will cure in the mixing container and generate a high exothermic temperature.
Therefore, when using fast systems, it is better to prepare several small batches progressively as the work advances.

On the other hand, using a slow hardener will increase the curing time of your project. In this case, it is preferable to choose a slightly faster hardener. This is often the case in winter, when low temperatures tend to slow down curing systems.

The working time (pot life) must be longer than the estimated application time.