Did a float test on the boat yesterday and after about 10 to 15 mins in the water there was about 4 inches of water in the boat. pulled boat out of water and watched where the water was escaping. It was primarily coming out the bottom seam where the transom meets the bottom of the boat. I removed the paint at the seam and found what looked like bondo. I cleaned out the locations that need attention. The previous owner filled most of the seam on the bottom of transom and about 12 inches up each side with white filler I was told was bondo. I need to know what I should use to fill and seal these compromised spots. Should I be using epoxy or should I use the 3M 5200 caulk? For epoxy applications it was recommended I use WEST system epoxy and for an application where you don't want to use epoxy i was told to use the 3M 5200. I don't know what I should be using around the transom.