I have removed my old transducer from my boat and will be installing a new one soon. The hole to poke the cable through is below the water line (Boat is glass) and was filled with some kind of silocon. Is this the best option to fill a 1" hole with a transducer cable in it. Obviously the hole is that big to get the plug through. Personally i would have put the cable through above the water line but its been done by the previous owner.
Or, would i be better to get that hole repaired and poke the cable through above the water line? If so how to repair a hole like that?

), they are not cheap but I have used them to do exactly what you describe and as a extra precaution back filled them on the inside with sika flex if they are below the waterline. Sikaflex on its own will work but these are better and look far less agricultural
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