The crystalline phase undergoes a further optimization and there is a reorganization of the amorphous phase into a denser structure. These result in a further increase in Stanyl’s high-temperature, mechanical properties and a reduction in it's moisture uptake

Annealing can typically lead to the following property improvements in Stanyl:
- High temperature strength and stiffness (above Tg) can be increased by up to 50%
- The fatigue performance can be considerably improved
- Wear resistance may be improved by as much as 50%
- There is a substantial reduction in moisture uptake, leading to better dimensional stability. Reducing water uptake by annealing is UNIQUE for Stanyl.

Depending on the chosen time/temperature combination, water uptake in Stanyl can be brought down below PA66 and PPA levels, and to the level of cast PA6