Older boat rubber window gasket. You can see how "gap" from shrinkage was siliconed.This thread suggest a possible replacement source:
http://www.c-brats.com/viewtopic.php?t=11820
Older boat rubber window gasket. You can see how "gap" from shrinkage was siliconed.This thread suggest a possible replacement source: http://www.c-brats.com/viewtopic.php?t=11820