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Use pH-neutral cleaners specifically designed for stone surfaces to clean granite or marble. Avoid acidic or abrasive cleaners that can damage the sealant or the stone itself. Regular re-sealing helps protect the surface from stains and damage.

You don’t need to seal German smear; the mortar is already acting as a sealant for the bricks. You can seal the mortar, though, if you wish to further protect the area from stains, moisture, and dirt or make it easier to clean and maintain. Note that a sealant will make the mortar appear more glossy.

A mason lays brick or stone together, sometimes with mortar in between the bricks and stones, and sometimes without mortar, also called a dry-stack or surface bonding. Examples of work masons do include:

• Brick, stone, or cement block houses and buildings

• Freestanding stone or brick walls

• Chimneys with wood-burning fireplaces

• Cement block basement or crawl space walls

No, minor quartz stains are usually not permanent. Addressing spills on your countertop quickly can prevent the stain from worsening. Any remaining stains can generally be removed with a quartz-safe cleaner or a mixture of dish soap and water applied with a soft microfiber cloth. Severe stains may need professional treatment—and, in severe cases, countertop repair or replacement.