Failing to seal natural granite regularly can allow liquids, oils, acidic juices, and moisture to seep into the microscopic pores of the stone, leading to stubborn dark stains and discoloration. While not all granite requires annual sealing—some dense varieties only need sealing every few years based on water drop absorption tests—neglecting a porous granite surface leaves it vulnerable to chemical absorption from everyday kitchen spills and bacterial growth inside unsealed pores.
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