How to Seal Granite Countertops - A Step-by-Step Guide
Granite countertops are widely used in kitchens because they are durable and elegant. However, maintaining your granite surfaces is very important to keep them looking as perfect as the day they were installed. Sealing is one of the most crucial aspects of granite care, which helps preserve its beauty and functionality. In this blog, we will tell you how to seal granite countertops, identify when sealing is needed, and properly maintain them so they look brand-new for years to come.
Do Granite Countertops Need to be Sealed?
Granite is a naturally occurring porous stone, meaning it has tiny openings or holes within its structure. While it’s a highly durable material, these pores can absorb liquids like water, oil, or wine, which could lead to staining, discoloration, or even damage over time. Sealing granite countertops helps protect the stone by filling these pores with a protective layer, which protects the liquid from penetrating inside the pores.
The need to seal granite countertops depends on the type of granite, its porosity, and how often the countertop is exposed to liquids. Granite countertops should often be sealed so they look perfect for a long time.
How to Know if Granite Needs Sealing
There are many ways to check if your granite countertop requires sealing. A simple water test can tell you the level of porosity and whether sealing is necessary:
The Water Test
- Place some drops of water on your countertop in several areas.
- Wait for about 10-15 minutes to see how the water behaves.
- If the water beads up, the granite is well sealed, and no additional sealing is needed.
- If the water soaks into the stone, leaving a dark spot or a noticeable ring, this indicates that the countertop needs to be sealed.
- Additionally, if you notice discoloration on the countertop that won’t come out easily, it is time for a reseal.
Sealers for Granite Countertops
There are different types of sealers available for granite countertops, which give different levels of protection and finish:
1. Penetrating Sealers
Penetrating sealers are the most commonly used and effective type of sealant for granite. These sealers get absorbed into the granite, filling the pores to prevent liquids from being absorbed. They do not change the granite's appearance, and the stone retains its natural texture.
2. Topical Sealers
Topical sealers create a protective layer on the granite countertop, which provides a glossy finish. While they offer good protection against stains, they may alter the natural look of the stone and can wear off over time.
3. Spray Sealers
Spray sealers are a convenient and quick option for sealing granite countertops. They provide a thinner coat compared to penetrating or topical sealers. Spray sealers may be suitable for minor maintenance, but they aren’t as long-lasting or durable.
Steps of Sealing Granite Countertops
Sealing granite countertops is a very simple process, but it does require attention to detail. Here's a guide on how to seal granite countertops:
1. Clean the Countertop
Before applying any sealer, thoroughly clean the granite surface. Use dish soap and warm water for that, and avoid harsh chemicals. After this, wipe it down with a soft cloth and dry it completely.
2. Choose the Right Sealer
Opt for a high-quality penetrating sealer. The sealer should be suitable for your specific type of granite and offer water and oil resistance.
3. Apply the Sealer
Coat a layer of the sealer onto the granite surface with a soft cloth or sponge, working in small sections. Ensure that the entire countertop is coated. Do not apply too much sealer, as excess sealer can leave streaks or a cloudy finish.
4. Let the Sealer Soak In
The sealer should be allowed to sit on the surface for about 10-15 minutes so that it can get absorbed into the stone. If any areas of the countertop still have excess sealer on them after the waiting period, wipe them off with a clean cloth to prevent buildup.
5. Buff the Surface
Once the excess sealer is removed, buff the surface with a dry cloth. Buffing removes any remaining residue and gives an even, smooth finish.
6. Cure Time
The countertops should be allowed to cure for at least a day. The sealer needs to be fully dried and bonded with the granite, which gives long-lasting protection.
How to Reseal Granite Countertops
The protective layer of the sealer may wear off due to regular use. Resealing your granite countertop is necessary when the countertop starts to show signs of staining, water absorption, or discoloration.
The resealing process is very similar to the initial sealing process:
- Clean the countertop thoroughly
- Test the surface for porosity by performing the water test
- Apply a fresh layer of sealer, following the same steps as when first sealing the countertop.
- Buff and cure the countertop so the new layer of sealer is properly absorbed and the surface is protected.
Generally, granite countertops should be resealed every 1 to 3 years. However, frequent exposure to liquids or heavy use may require more frequent resealing.
Maintenance of Sealed Granite Countertops
To maintain your sealed granite countertops, follow these tips:
- While cleaning granite countertops, avoid using abrasive sponges.
- Clean up spills promptly so they can't damage the sealer.
- Prevent scratches and heat damage by always using cutting boards and trivets.
- Do not use acidic cleaners because they can break down the sealer.
- Based on your water test, reapply the sealer every 1-3 years or when required.
Conclusion
Sealing granite countertops can maintain their beauty, durability, and functionality. Proper sealing and maintenance techniques can make your granite surfaces continue to look pristine for years. Regular care will preserve the natural elegance of your granite and protect it from stains and damage. If you want a new granite countertop or to refresh your existing surfaces, sealing is the key to long-lasting, beautiful countertops.
