There is a lot of talk about the 4k and 5K sealants. After researching this a lot myself I ended up doing a blend of eternabond around the vents and AC and sealed the trim on the top and sides with the 4K. I ended up choosing the 4K because it's much more flexible. 5K will seal but it's much more rigid and from the posts I saw on the marine forums truly permanent meaning stronger than many of the materials it's holding. That would make for difficult removal if necessary.
I dealt with the antenna by lifting the boot up put some of the 4K around the cable and then slipped the boot back on then wiped off the excess.
Good luck!
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