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The angle at which you cut countertops depends on the material, your intended outcome, and the location of the cut. For example, rather than cutting a straight 90-degree angle for internal corners, cut edges at a 45-degree angle to give a clean, professional look. For outside edges, most homeowners want squared-off sides, so 90-degree angles can make the most sense there. Because you want to get angles exactly right to minimize seams and eliminate the need for patching, be sure to measure several times before cutting and use the right equipment to get sharp, accurate angles.

Baking soda can damage some countertops, but it makes an excellent mild abrasive for removing stains on other countertops. For example, never use baking soda on quartz or glass countertops, but you can use it on laminate and tile. Stay away from using it on quartz because it can scratch and damage the counter, and glass is prone to scratches. Since baking soda is a mild abrasive, you can only use it on certain surfaces.

No, you don't have to apply polyurethane to butcher block countertops. Polyurethane sealant is a long-lasting finish for a butcher block counter, but its application also requires thoroughly sanding the surface multiple times. Other materials, such as mineral oil, require less work but must be applied more frequently.

The frequency for sealing granite countertops depends on several factors, including the type of sealant used, the color of the granite, and how heavily the countertops are used. As a general guideline, resealing is often recommended every 12 to 18 months, but some sources suggest it could be as often as every few months or at least once a year.

The type of sealant is a major factor: water-based sealants may need reapplication every six months to a year, while more durable solvent-based sealants can last for five to 10 years. Additionally, factors like heavy kitchen traffic, frequent use of acidic cleaners, and lighter granite colors may require more frequent sealing to prevent staining.

To determine if your countertops need resealing, you can perform a simple water test. Place a few drops of water or a wet paper towel on an inconspicuous area of the granite. After 10 to 15 minutes, check the spot. If the water has beaded up, the seal is still intact. If the water has been absorbed and darkened the stone, it's time to apply a new coat of sealant. You can choose to seal the granite yourself or hire a professional to ensure it's done correctly.