I've got an issue with the top of my tile line having a crack that i can see under the slab for the decking. Basically i have a stainless steel edging/coping that hangs over the pool in a typical cantilever fashion. The tile line is below this and in places there is a small crack that i can see dirt under the cement slab for the decking. how should this be sealed?
I'm guessing caulk, anything specific other than cement/block caulk?
here is a drawing to illustrate: