I have just laid some cement paths at home using the mixes as per this website and find that the top surface will not harden, there seems always to be a layer of cement like sand that we need to sweep away daily. Is there anything I can do to seal the surface and make it a bit harder wearing, as it is we can,t even paint it.
If the paths are outside and you did not protect them from frost then this will be the problem. You will need to scrape back to a sound surface and then spread a strong cement/sharp sand screed onto the surface.
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