My solution was Flex Seal; see that in this thread:
http://www.thorforums.com/forums/f27...axis-1433.html
What a great idea. I've seen that stuff at Lowes as well, and it looks like a good way to head off a problem. Knowing that these seals will once again harden and decay, it's a good way to fix it before that happens. More fun stuff to do!
bruce