Hope your fluid can circulate in micrometers between sandwiches of silicone. I bet it cannot. Even pure metal solder has limited thermal capacity. Enough that

Hope your fluid can circulate in micrometers between sandwiches of silicone. I bet it cannot. Even pure metal solder has limited thermal capacity. Enough that people got mileage from milling down micrometers of chips... The other side becomes less conductive too.