I am mounting my controller in my garage, replacing the old Rainbird controller. Upon removal, I had a lot of bugs, spider webs etc everywhere inside and behind the unit. Years of environment exposure.... My mount of the BlueSpray will be made thru the back, not the bottom to hide the wires that exist thru the wall.. I needed to seal the hole, and the PERFECT option was to use 36mm Silicone plugs from amazon... 7.99 for two.
MECCANIXITY High Temp Silicone Plug Mount Dia 36mm/1.42 Inch T Shaped Rubber Stopper Hole Plugs
https://www.amazon.com/dp/B0CQR75TX7?ref=fed_asin_title&th=1
