How many applications of sealer are needed on granite or other porous stones?

Q. I understand that some stones are more porous than others and one application of sealer/impregnator may not be enough. But how will I know?

A. On granites, at least two applications of sealer are recommended, with at least two hours in between applications. Very porous granites, sandstone, quartzite, etc. may require three or more applications. To find out if your stone is perfectly sealed, spill some water on it and wait for approximately half an hour, then wipe it dry. If the surface of the stone did not darken, it means that the stone is perfectly sealed. Use this same test to determine when it is time to reseal. To learn more, see our free, downloadable Stone and Tile Care Guide. Ask your professional stone restoration contractor to seal your granite. If you do not have a PRO, contact us.