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Standing water can lead to surface discoloration if your granite countertops are improperly sealed. However, it’s possible to remove hard water stains with a baking soda paste. Take more care with acidic liquids, such as fruit juice or red wine, which can leave more permanent stains. That’s why it’s so important to reseal these surfaces regularly.

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.

When cleaning your patio, you’ll need to ensure the chemicals you use aren’t harsh enough to destroy the seal or stones. You can clean the stones with a mixture of white vinegar and water or soapy water and a scrub brush. Just be sure not to use wire brushes, as these can scratch the surface. 

Silestone® isn’t recommended for outdoor use because UV rays can damage the surface. Long-term exposure to direct sunlight can cause discoloration. Instead, choose an outdoor-friendly countertop material like tile, concrete, stainless steel, or natural stone. If you do choose a natural stone, make sure you either seal it or avoid highly porous stones. For example, choose soapstone over marble.