Copper and cement do they mix?

I want to move the taps in my bathroom they come out of a boxed in void at the moment but I would like to move them into a concrete brick wall (the bricks are like the grey garden pavers with cement on top). is there a particular cement or render i should use? I am worried lime or something on the cement may attack the brass and copper in the tap bases and cause a leak down the track. should I paint over the fitting with something before I cement it in. Or should I just chase out the hole for the fitting and cover the lot in villaboard or similar.


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