VHF/UHF radio mounting help needed

I wanted to get some ideas on how to mount a communication radio on the roof of my 2015 RZR S 900. It has the plastic Polaris roof and I want to mount it so it’s as protected from the elements as possible. I was wondering how those of you combat the elements like rain, morning dew, power washing, creek splashes, ect. Any help would be greatly appreciated, pics would be nice too 🙂