Cue Zep, a grout cleaner and brightener ... While it is good for floors like porcelain and ceramic, it is not recommended for use on marble, terrazzo, travertine, natural stone, or stainless ...

It’s a good option for those with multiple stone surfaces in their homes. Get the Black Diamond limestone and travertine floor cleaner at Amazon or BDStoneworks. We also tested the Zep Neutral ...