METHOD - silicone baking mat bed insulation and surface adhesion

Silicone baking mats, used for 2 things:

The much LESS interesting use:
- The pyramidal surface mat - thermal insulation between silicone heater pad/aluminium hotbed and the Y axis chassis.
https://www.aliexpress.com/item/Creative-Pyramid-Silicone-Baking-Mat-Nonstick-Pan-Pad-Cooking-Mat-Oven-Baking-Tray-Mat-Kitchen-Tools/32807788480.html
I have been using the pyramid mat for a few months. Compared to proper stuck-on insulation this is probably quite insubstantial, but as a simple, removab