Troubleshooting Slow Heat-Up in a Silicone Heater System

https://heater-design-center.pinehavenscope.com/posts/understanding-temperature-control-for-a-kapton-heater

In temperature-controlled assemblies, a silicone heater must deliver heat in a controlled way. It uses silicone rubber around a resistive heating circuit. One useful trait is flexibility. Still, bond quality can change the result