How To Seal Granite Countertops: A Comprehensive Guide Granite countertops are a symbol of elegance and durability in kitchens and bathrooms. Their ability to resist heat, scratches, and most forms of damage makes them an ideal choice for high-use areas. However, even the most robust granite surfaces can suffer from long-term wear and tear if not properly maintained. One of the most essential aspects of granite care is sealing. Sealing granite countertops prevents liquids like water, oil, wine, and food from soaking into the stone, which can cause irreversible stains and deterioration.