Winterize a Window AC Unit
I have a window AC unit that there is no way for me to remove and store. It has the vinyl accordion fold-outs on either side. I can see quite a bit of light all the way around it. The installation guy told me to use "foam tape" to insulate it before winter. A search of Lowes did not turn up anything that could possibly cover and winterize the side pieces or air holes.
How should I winterize the unit so that it isn't Swiss cheese?