I have an ethernet cable that goes into house from the outside wall.
What sealant should I look for that will not crack the cable?
I need to keep wind and rain out of the house from the hole.
It has to be compatible with plastic.
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I normally use a paintable silicone but with brick would use clear , silicone is what the cable and satellite company's used on my homes and I use it at work also for sealing small holes.
I would suggest using some Great Stuff.