Caring for Granite Outdoor Kitchen Countertops: A 3-Part Guide

Posted by Shelly Salomon on Jun 21, 2023 11:09:00 AM

granite samples - countertop care(1)-1

Granite is one of the most popular materials for outdoor kitchen countertops, and it’s easy to see why. It’s beautiful, durable, and offers flexibility in your outdoor kitchen design. But to keep your outdoor granite countertop looking great, you’ll need to take a few proactive measures. 

This guide provides basic yet essential instructions on properly caring for your outdoor granite countertop. Following these steps will equip you with the knowledge and tools necessary to maintain your outdoor kitchen countertop in excellent condition so you can enjoy its functionality and aesthetic appeal for years to come.

Part I - Granite Outdoor Kitchen Countertops: Basic Features

Outdoor kitchen countertops come in a variety of colors, materials, and sizes, which can impact their prices. Granite outdoor kitchen countertops typically fall within the mid-range price category, ranging from $50 to $100+ per square foot.

However, there are additional factors to consider that may influence your decision regarding an outdoor granite countertop. Check out these pros and cons.


  • Durable hard material, making it fit for an outdoor setting
  • Scratches and stain resistant
  • Low maintenance material
  • Sleek and contemporary aesthetic, with a large variety of granite countertop colors; white granite countertops and black granite countertops are the most popular ones.
  • Granite absorbs heat
  • It is porous 
  • It is prone to cracking
  • Requires periodical maintenance

*Fun fact: Granite can also be used for outdoor kitchen finishes.

Part II - Granite Outdoor Kitchen Countertops: Routine Maintenance

Granite is a natural stone, but that doesn’t make it invincible. Therefore, it is important to familiarize yourself with the best practices to prevent staining and abrasions on your outdoor granite countertop.


As already established, certain types of granite are slightly porous, meaning liquids can seep into the stone. Accidentally spilling a beverage or cooking oil can be problematic, as the stain may penetrate beyond the surface, making it difficult to clean completely. These small crevices within the granite can also serve as breeding grounds for bacteria and other microorganisms.

That’s why it’s vital for many granite outdoor kitchen countertops to be sealed. Better yet, note that not all granite varieties actually need it. Some dark granite types may even benefit from or respond positively to a sealant. If you are uncertain whether your granite countertop needs sealing, contact your outdoor kitchen contractor for clarification.

The DIY Sealing Test:

Are you unsure about the sealant on your outdoor granite countertop? There is a simple and quick water test you can do.

Pour a small amount of water onto the counter's surface and observe the results. 
If the water forms beads on the top or takes considerable time to be absorbed, it indicates that the sealer is still in excellent condition. 
If the water is absorbed within a few minutes, it indicates that your granite countertop requires a fresh sealing application.

How to seal granite countertops?

Many sealers are available on the market, so you’ll need to research. Be sure to choose a water-resistant sealer since your outdoor kitchen will be exposed to the elements.
  • For superior protection, consider choosing a high-quality sealer that contains fluorocarbon aliphatic resin. This type of sealer can safeguard your countertop for several years, ensuring long-lasting durability.
  • A slightly more affordable alternative is a sealer that contains silane or siloxane (not to be confused with silicone). These sealers may necessitate reapplication every 3-5 years to maintain optimal protection.
  • Avoid cheap sealers or those that contain silicone or linseed oil. These can do more harm than good.

Most sealers are applied through a spray-on method and do not require complicated polishing steps. Nonetheless, it is crucial to follow the instructions on the sealer bottle carefully. Additionally, ensure that the countertop is thoroughly cleaned before applying the sealer.

Repeat the process

Severe weather conditions might compromise the protection provided by the sealer. Therefore, it is crucial to re-seal your outdoor granite countertop as needed. When re-sealing, it is recommended to utilize a high-quality penetrating or impregnating sealer.


Regular cleaning is essential to maintain the shine and beauty of outdoor kitchen countertops. Cleaning Your Outdoor Kitchen’s Countertop not only enhances its visual appeal but also helps maintain its value over time. When dealing with granite outdoor kitchen countertops, it is important to note that most countertops have a sealant applied. As a result, it is advisable to seek instructions from your kitchen installer regarding how to clean granite countertops.

Anyway, one rule of thumb to remember is to avoid abrasive cleaning pads that can diminish the countertop's shine. Instead, use soft cloths, soft-bristled brushes, or microfiber materials, as they are particularly effective in maintaining the granite's appearance.

How to clean granite countertops?

Method 1: Simple soap

For everyday cleaning, mild dish soap and hot water work wonders. 

  1. Begin by using a soft cloth to eliminate dust, pollen, and other debris from the surface.
  2. Wipe down the countertop using a cloth, soft-bristled brush, or sponge dipped in the soapy water.
  3. Double Check that no soap residue is left behind by wiping down or rinsing the countertop again.

In most instances, this simple cleaning method will suffice. However, attending promptly and swiftly to any stains is essential, as the sooner they are addressed, the better.

Method 2: Isopropyl solution

If you’re having a little trouble removing stubborn stains that require additional cleaning power, you can mix diluting isopropyl alcohol with an equal amount of water in a spray bottle. Apply your new granite countertop cleaner to the affected area, and let it sit for up to 5 minutes. Then rinse and wipe the surface with a soft cloth.

Method 3: Baking soda

For the toughest stains, resist the temptation to try a high-power cleaner, which could contain chemicals harmful to your countertop. Instead, create a paste by mixing baking soda with water or a small amount of hydrogen peroxide.

Apply the paste directly onto the stain and leave it overnight, or for a longer duration if necessary (up to 24 hours). To keep the paste in place, cover it with plastic wrap secured using painter's tape. After the designated time, wipe away the paste using a damp cloth.

Cleaning ingredients to avoid

  • Acidic cleaners, including vinegar anything with citrus juice
  • Ammonia-based cleaners (including Windex—sorry, Gus Portokalos)
  • Bleach (including Clorox wipes)

*Fun fact: Out of all of the areas in your kitchen, your countertops should be the cleanest. Ironically, though, they tend to get dirty the fastest. Read more >> Your Outdoor Kitchen Cleaning Checklist.

Part III - Granite Outdoor Kitchen Countertops: Five Pro Tips

Whether you're gearing up for a big party or short of time to read the entire article, here are five valuable tips to remember for extending your outdoor granite countertop life:

  1. Utilize a cutting board when chopping or dicing foods.
  2. Avoid scraping stoneware or other rough materials along the surface.
  3. Take caution with wine, oils (such as salad dressing), vinegar, and citrus fruits, as they can potentially discolor granite. Consider storing these on a tray as an extra precaution.
  4. Quickly wipe up any spills with a clean cloth.
  5. Ensure adequate shading by using umbrellas or patio roofing to cover your countertops.

*Bonus: The commercial market offers a wide selection of stones labeled as "granite." It is essential to do thorough research before buying one.

We're here for you and your backyard!

The expert teams at Unlimited Outdoor Kitchen are dedicated to assisting you throughout the decision-making process, providing comprehensive explanations and insights for any ideas you may have. For further information on various maintenance-related topics, please refer to the following list, and feel free to contact us directly by clicking the banner below!

New Call-to-action


Topics: Kitchens