We always recommend pre sealing stoneprior to installation. Any Silicon or paraffin based system will protect and beautify your stone work. Allows for easier cleaning too. You could use AquaTight Hydraguard which protects, seals, protects natural stone image.
A little about myself . My name is Harry Harshaw and I have been in the construction industry for over 25 years. I am a hone inspector. Installed over a million square feet on multiple projects over my lifetime. Been with some of the best in the industry for the USA market. Since moving from...