Ok, in my 16 ft flat bottom alluminum boat, it will take on some water in the back right corner near the plug..I have a pump but it doesnt work good enough. I constantly have to take a water bottle cut in half and scoop it out. I dont know if its coming from around the plug or through one of the corners or wherever. I wrapped a brand new plug with plumbers tape but that didnt seem to stop the problem. I have a welder, but not an alluminum welder so i can't use it on my boat. Will caulk (spl?) work or any other stuff to help slow down the leak??