Key Takeaways Seal marble at install and reseal every 6–12 months or after harsh cleaning.Test with water—if it soaks in within ... you may end up trapping moisture in the stone when you seal.

Man Wa Lane is an alley in one of Hong Kong’s oldest neighbourhoods, Sheung Wan. A 100-metre length of it nicknamed “Chop Alley” has been the home of Chinese stone seal makers since the 1930s.