Our pool was built in the 70s on a slope. Heavy rains have really taken a toll on a couple of slabs of sagging concrete but that would be an enourmous undertaking. We may not evenive in this house for that long to invest a total overhaul. There appears to be an old pebble layer on the bottom of what looks like concrete layers and cool deck and it's all flaking. What's the easiest way to patch the appearance? I know it's going to crack, probably in the same places as before, but at least it won't be Cru long for a while. I've seen something called ruberoc on YouTube. Is that a legit temporary solution?