I basically have a large antenna for my house and when we moved in the wire only went to one side of the house (bedroom TV). I wanted to split this and have it go to the living room TV as well. So, I split the signal with a standard splitter and drilled a hole into the masonry in the basement and got the cable wire through. The problem is that the hole is a bit wider than the wire and I could see critters and of course cold air coming in in the winter time.
I'm not a 'cable guy', but what is the right caulking to apply on the outside, and also, should I use the expanding foam to spray inside where the cable runs through the drilled hole? I don't expect to move this ever, so I don't mind if it's mumified. But I do want to keep my basement/home free of cold and critters.