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A water-based, low- or no-VOC sealer is typically a good choice for marble countertops. Choose a sealant that is certified safe for contact with food when applying to kitchen countertops. For high-traffic areas, look for formulas that have heat-resistant and acid-resistant features. While there are economical and convenient spray-on sealers, they don’t coat the surface as effectively as the ones you apply with a pad or brush. 

Engineered stone is known for its durability, lasting 15 to 20 years or longer. Of course, this range assumes high-quality materials and regular maintenance. After a couple of decades, the stone will start showing its age. Watch for discoloration, fading, stains, and burns, but it’s unlikely that engineered stone will experience structural failure.

Overall, granite tends to cost more than marble. Prices for each material will fluctuate depending on the source of the stone, your location, shipping costs, and the thickness of the material. Labor to install marble or granite countertops typically ranges from $35 to $45 per hour. Granite and marble tile and slab costs compare as follows:

• Marble tile: $7–$10

• Granite tile: $5–$15

• Marble slab: $25–$60

• Granite slab: $50–$100

Yes, Corian® and other solid surface countertops can be cut with standard woodworking tools like a circular saw or a jigsaw, but using the correct blade is crucial for the best results.

The recommended blade is a tungsten carbide-tipped blade, often called a solid-surface planer or triple chip grind blade. This type of blade is hard enough to cut through the material effectively. For a jigsaw, a fine-tooth down-cutting blade should be used.

It is important to note that a diamond blade is not necessary. Diamond blades are designed for harder materials like natural stone, concrete, or brick, and Corian is not a natural stone.

Using blades designed for wood is not recommended as they can cause microfractures that weaken the countertop's edges. While a tungsten carbide blade provides a much cleaner cut, the resulting edge will still be rough and must be sanded and smoothed to prevent microfractures from developing over time.