After the old caulking was removed, I injected some epoxy under the teak planks. There appeared to be a void in the corner of the coachroof and deck, and this was a place for water to collect. The void was easily detected as the spot remained wet longer than the surroundings. Thus I decided to fill this void with SP 106 epoxy. I was influenced by this sailor/blogger, who used epoxy injection on deck repairs as well. The repaired seam is now let to dry under the tarpaulin for a while, before I start cleaning the deck.
Removing the old caulking and cleaning the seam. This is the most time consuming part of the repair.
Warming epoxy in water bath before use
Mini pump helps getting accurate metering of resin/hardener mixture: five strokes of resin and one stroke of hardenerer.
Injecting epoxy with a syringe.
Applying new caulking. (At this time the camera decided to start taking black/white photos)
Finishing still wet caulking with a tip of finger (moisten with some washing-up liquid)