The most common source of deck leak on the Oceans (in fact all the boats with teak toerails) is from behind the wooden mouldings under the toerails. These mouldings cover the hull/deck joint. If you remove the stainless steel strip and then remove the teak moulding, you will see the joint, and I would go along it with some CT1, as there’s a high chance that there is a gap in the sealant. I say to use CT1 because you can put it onto wet surfaces.