[wrenchami]

I found the process of replacing my similarly deteriorated seal daunting and tried plan B which seems to have worked well. Your seal may be too far gone for this, but here is what I did in July. I bought a can of white Flex Seal to renew the seal. I started by gently but thoroughly cleaning the seal with Simple Green. Once fully dry I repaired the split areas using contact cement in order to restore shape and hold it together long enough to get the Flex Seal on. I then applied the Flex Seal with a paint brush. The stuff is very thick and it is more dragged across the surface than painted on. Once dry, it is very strong yet flexible and becomes the structural material of the seal. It seems to have worked very well. It is a flexible rubber like coating that is claimed to be UV resistant. I know I just kicked the can down the road with this approach, but hopefully it'll give several more years of service.