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You know I have a maco 5/8 and it has been great for like 10 years. I do know what you are saying as mine changes slightly when it rains, not enough to worry though. I did use silicon sealant and put a big glob on the top of the connector where the copper wire goes into it. I sealed it real good in fact over kill but that is the way I do things lol. Then seal the connector all around the coax and connector where it screws together.


I would make sure there is no water in the coax as Marconi said to then seal all as I said.