I’m re-attaching my transom transducer mounting board to my aluminum boat. I plan on driving 2 Stainless Steel screws through the board into the transom and also using either 3m 4200 or 5200 sealant in the screw holes as well as on the face of the mounting board. I understand that 5200 is more or less permanent, and 4200 can be removed. Is that really the only difference? Those of you who have put these plates on, what did you use?
Any and all suggestions are appreciated.