The Wacker ELASTOSIL® RT 675 A/B potting compound has amazing heat transfer properties:
Thermal conductivity: 1,2 W/m×K.
Pure aluminium: 237W/m*K.
Normal aluminium: 100W/m*K.
This silicone compound is in other words 480 times better
than air or 100 times worse than solid aluminium.
We may want to use this as a partial fill for the new products with lots of SMD switches, it will make heat transfer much simpler.
It is sold by Elfa in sweden, article number 80-852-84.
1100SEK + VAT for 2kg!