Slate pool coping is disintegrating. Opinions please
We have slate coping and waterline tile installed in our gunnite saltwater pool which was built about 2 years ago. A number of the bullnosed coping tile are eroding and spalling chunks of slate/mud into the pool. The waterline tiles have fared much better and have only mild signs of erosion.
I suspect that the pool builder did not seal the tile properly and that this is caused by the electrolytic nature of a saltwater system. The most affected tiles are in the shallow end of the pool where the evaporation rate is higher. Overall, I'd say that I plan to seal the tiles over the holiday with a product called DryTreat 40 SK which is supposed to impregnate and strengthen friable stone. Then I'll try to repair the worst 3-4 coping tiles later. We live in houston so I don't think freeze & thaw is an issue.
Any opinions on weather or not this is a worthwile endeavor? The sealant is pricey. Or is it better to just let it play out for another season and get quotes for what will likey be a pricey remodel affair?