Marble is a calcium-based stone that reacts negatively to acidic substances, making it prone to etching. It requires a high-quality penetrating sealer applied according to the supplier's instructions and routine cleaning with pH-neutral stone-safe soap. Slate is a metamorphic rock that can be porous and prone to clefting or flaking; it requires a penetrating sealer to protect against stains and water infiltration. Unlike marble, slate is generally more resistant to mild acids but still benefits from specialized stone cleaners. Avoid harsh chemicals, vinegar, or ammonia on either surface. Verify your specific stone's porosity with your installer to determine the ideal sealing frequency.

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