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If you notice dull spots on your marble floor, that could result from etching. If you’ve used the wrong type of floor cleaner in the past or left a spill unattended for too long, your marble floor may have suffered some surface damage. While there are ways to protect your natural stone from etching, you may have to call in a professional for repairs.

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.

Granite and marble compare well against each other in terms of price, durability, and aesthetic appeal. Deciding which one is better depends on your personal style and preference. Both materials resist damage like chips and cracks well. You should seal both material types against staining and etching, but they’re still susceptible if oil, wine, coffee, tomato sauce, or juice are left on the countertop long enough. As material and installation costs range similarly, the deciding factor is your budget, design, and preferences.

Unsealed granite is more susceptible to staining and other damage. Regularly sealing your granite countertops decreases the chances you’ll need to repair damaged countertops in the future. It also keeps it looking shiny rather than becoming dull over time. You can check whether your granite needs resealing by putting a few drops of water on the counter and waiting 15 minutes to see whether the water permeates the surface.