should i seal my granite countertop
Sealing Granite Countertops. Although most granite countertops don't need to be sealed, it does help the stone resist dirt and spills, which can cause etching and staining [source: Marble Institute of America ].By its nature, granite is moisture-resistant -- however, it's also porous. Sealants block liquids from seeping into the granite.lthough most granite countertops don't need to be sealed, it does help the stone resist dirt and spills, which can cause etching and staining [source: Marble Institute of America ].