Sorry dude, obvious to you(and half the world maybe

), but I always equate silicone with
tube or
sealant and the cores not made out of either of those is it?...
Now can you tell me whats in the core?, is it layered?, or is it one 'lump'?. what is it there for if it contains no 'curcuitry'?.is it there to protect something underneath?. I'm wondering if it can indeed be engraved with channels for direct die cooling?, and how deep if yes?...