Our wooden coachroof has a rubbery stuff glued to it, and a hardwood moulding around the edge. To stop water getting between the moulding and the coachroof a fillet of grey sealant has been added. Over time this has shrunk and allowed water in, so I'm stripping it back to revarnish and replace the fillet of sealant - the question is which of the plethora of Sikaflex (and other brands) products should I use?

Here's a picture showing a small section of the sealant left in place:

Mike