Originally Posted by MrNatural
Homercidal, am I reading right that you put heat sink compound on both sides of the plastic, between SSR and heat sink?
No, I cut an opening in the side of the box for the heatsink to fit into, with tabs of plastic so I could run screws through the tabs, into the SSR and thread into the heatsink. My heatsink was one of those cheap ones that come with the SSR and there was no way to mount the heatsink to the plastic and have it outside the box while the SSR was inside.
I thought I had a good solution until the heads of the screws sunk into the tabs a bit.
It's something I probably should have realized before I built it, but didn't. When I build my permanent control panel I'll do like Kal and use a large heatsink, no plastic required. I guess I was just in a hurry to test it out.