The steps into my pool are sandstone rendered,and the stone is becoming very loose now from the render.

Would anyone know of any product like a waterproof glue or resin that can be used to stop any more erosion??

Or would I be better draining the pool and possibly tiling over the steps area or trying to re render them??

Thanks for any ideas...

I have the same problem. My swimming pool guy says it's caused by the chlorine breaking down the cement over the years between the rocks. He suggested I might drain the pool to expose the steps and use swimming pool grout to smooth it out. I didn't want to use tiles (which he also suggested) as they get too slippery when wet. To me, tile steps are an accident waiting to happen.

Epoxy resin

I have the same problem. My swimming pool guy says it's caused by the chlorine breaking down the cement over the years between the rocks. He suggested I might drain the pool to expose the steps and use swimming pool grout to smooth it out. I didn't want to use tiles (which he also suggested) as they get too slippery when wet. To me, tile steps are an accident waiting to happen.

The cement breaking down isn't caused by the chlorine, but by the pH level and other acids in your pool water.

You will always have this problem with sandwash. I have seen a nice flat yellow/orange stone used for pool borders and steps. It might be smoothed sanstone, but I rather think it's palimanan stone which comes from Indonesia.