I have a 1947 Owens Cutter which I've rebuilt and sailed extensively. She is coated with epoxy and paint and the seams were splined with wood and epoxy. After two hard sailing sessions (20 kts wind, beating) seams are opening around the mast. Sawdust won't close them all, so I'm afraid I need to haul and caulk the leaks. The question is whether I should use cotton or a tube caulk such as 3M5200 fast cure or Life Caulk. Does anyone have experience and recommendations?