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How To Clean, Seal and Polish Granite Countertops: A Comprehensive Guide

September 2, 2023

Welcome to your one-stop guide for mastering the care of one of the most stunning and resilient materials in home design—granite. We are going to delve deep into how to clean, seal, and polish granite countertops to keep them looking as impeccable as the day they were installed. Let’s get started!

I. Cleaning Granite Countertops

Regular cleaning is the first line of defense in maintaining the allure of your granite countertops. You may think any cleaner will do, but the wrong one can do more harm than good.

How to Clean:

Opt for a pH-balanced cleaner specifically designed for granite or natural stone. Spray the cleaner generously over the surface and wipe it down with a soft, non-abrasive cloth. Avoid acidic or abrasive cleaners, as they can etch the stone surface. For stubborn stains, use a paste of baking soda and water.

II. Sealing Granite Countertops

Even though granite is relatively resistant to stains, it’s not entirely impervious. Sealing forms a protective layer on the stone, which is crucial for long-lasting beauty.

How to Seal:

Before you start, clean the surface thoroughly and let it dry. Apply a granite-specific sealant in a circular motion using a clean, lint-free cloth. Allow the sealant to penetrate for the time recommended by the manufacturer, usually around 15-20 minutes, then wipe away any excess. Test the seal by dropping water on the surface; it should bead up if sealed correctly.

Worker working and clean granite

III. Polishing Granite Countertops

Polishing your granite countertops doesn’t just keep them shining; it also reduces the small crevices where bacteria can grow. However, improper polishing methods can dull the surface.

How to Polish:

After cleaning and sealing, apply a small amount of granite polish to a soft cloth and buff in a circular motion. Always follow the manufacturer’s guidelines, as over-polishing can create a residue build-up. For best results, use a polish that is designed for natural stone and granite specifically.

IV. Do's and Don'ts

While knowing how to clean, seal, and polish granite countertops is crucial, being aware of what to avoid can save you from costly mistakes.

What to Do:

  • Always test any cleaner or sealant on a small, inconspicuous area first.
  • Wipe up spills immediately to avoid staining.
  • Use cutting boards and trivets to protect the surface.

What Not to Do:

  • Never use acidic cleaners like vinegar or lemon juice.
  • Avoid using abrasive pads, which can scratch the surface.
  • Don’t place hot pans directly on the granite surface.

V. Conclusion

Your granite countertops are an investment in your home’s beauty and functionality. Knowing how to clean, seal, and polish granite countertops is essential for preserving that investment. With regular maintenance and a bit of know-how, your granite surfaces will continue to shine and impress for years to come.

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