I've seen a gel used to fill junction boxes outside but I'm not sure what the thermal properties are like with something that generates heat like a plug back PSU?
I had thought the same thing but wouldn't recommend 'potting' the transformer with that gel. There are other materials you can use to 'pot' a transformer though. I don't have the experience to recommend one though.
I've seen a gel used to fill junction boxes outside but I'm not sure what the thermal properties are like with something that generates heat like a plug back PSU?