[aldo]

I've been wrestling with what product to use also but I think I am going with life-caulk. It can be applied under water, meaning it should be compatible with wet wood, and never completely hardens. I bought the 5200 but think I will save that for another job.
I owe it to the guys on this site for making me carefully check my scuppers. Mine were clearly deteriorated. I got the old ones out by breaking off the flare(It crumbled off) then drove them out with a 1" birch dowel and a hammer. If it ever stops snowing I'll get the new ones in.