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Does Granite Need To Be Sealed? [Why & How]

Sealing granite countertops can make them look fresh and last longer. When deciding between granite and other countertop materials, many homeowners choose granite. 

Does granite need to be sealed?

Yes, granite needs to be sealed. Regularly sealing granite protects it from stains, scratches, and other damage. Many homeowners protect their granite countertops once or twice a year. But you may seal them more often if you like. It generally takes 24 hours to seal it perfectly. 

You’ll need to learn more about how to finish the whole procedure. That’s why we’ve broken down each step and explained why it’s essential.

As a result, we hope you’ll stay a while!

Why Should Granite Be Sealed?

Granite is impervious to moisture, yet it is also porous. The pros and cons of granite countertops are pretty visible. Sealing isn’t necessary for most granite countertops except for some. 

Here are describing some reasons why granite sealing is essential:

  • The stone withstands dirt and spills that might cause etching and stains.
  • To prevent liquids from penetrating the granite, sealants must be used. Liquids will bead up on an adequately sealed countertop.
  • Cooking oil and grease, as well as colored liquids. (Such as red wine and grape juice), may stain the countertop. 
  • Another common cause is pizza oil. That seeps from the pizza box and coats your counters.

To avoid these problems, granite sealing is essential.

What Are The Advantages of Sealing Granite Countertops?

Sealed granite countertops are easier to clean. You won’t have to use abrasive cleaners when you do. 

You’ll benefit from a cleaner work surface for a longer time. The porous nature of granite makes it a breeding ground for germs. 

Sealing also reduces the number of fractures. And crevices where these organisms may thrive there.

You may clean granite using mild soap and water and countertop cleaning solutions. Even though we don’t suggest using products that include bleach, ammonia, or acids.

You can also add cabinets to your kitchen for extra beauty. 

How to Seal Granite Countertops?

Before you seal your granite countertops, be sure you test their absorbency. A sealer can assist avoid severe damage to your countertops if they absorb any oils or liquids.

A suitable sealant will give you ample time to clean up accidents before they discolor your counters. 

Moreover, just like Thoroseal and Drylok wall coatings, there are many countertop sealers available. That’s why be sure to pick the right one.

Step 1: Do a Water Test

A simple water test may tell you whether you need to seal your counters or if they’re already sealed. To get started, follow the instructions listed below:

  • Sprinkle your granite counter with a quarter cup of water and let it dry.
  • Please keep track of the water’s flow from the time it was poured until it was absorbed.
  • There is no need to seal if water does not absorb and is instead repelled.
  • Granite countertops should be sealed if water is absorbed and leaves a black stain.

Here is how to conduct a water test properly. This will determine if you need to seal your granite countertops now.

Step 2: Examine the Sealer’s Directions

Simply for your information, go over the directions and warning labels. Instructions differ from sealer to sealer, so pay attention to them.

Step 3: Cleaning Granite Countertops

Before sealing your granite countertops, you must clean them. Without cleaning them your countertop won’t sit properly.

Step 5: Use an Even Application of Sealer

Spray or apply a liberal quantity of sealer on the countertop with a spray bottle. Let it sit for twenty minutes. Within this time, the sealer will soak into the granite stone. 

Before getting a sealer make sure it hasn’t expired. Because countertop sealers can go bad just how grout sealers go off.

We attempted to provide you with some high-quality sealers in this section to assist you:


Step 6: Remove The Sealer By Wiping It Off

You may have to reapply the sealer once you’re done with the first coat. Certain sealers need a second application, so check the label for details. 

Step 7: Wait 48 Hours Before Using the Counter

Allowing the sealer to dry is super important. Make sure you leave your countertops alone for at least two days. Otherwise, you might create a mess. 

If you don’t want to wait too long, you use the help of a fan. But don’t place it too close to the countertop. 

After following all of the directions, you should be able to seal your granite countertop. 


Question: How often should granite be sealed?

Answer: You seal granite countertops every “6-12 months” or “3-5 years”. This is a recommendation from certain professionals. But there is no set guideline. 

Question: How much does granite countertop sealing cost?

Answer: The average cost of granite sealing materials in the United States is $0.19 per square foot. Ranging from $0.18 to $0.20. Costs range from $0.77 to $1.63 per square foot combined. With a price range of $92.54 to $195.51, the average 120-square-foot project costs $144.03.

Question: Is linseed oil safe to use on granite?

Answer: Lemon and linseed oils both stain granite. In this scenario, we would suggest that you use mineral oil instead of citrus oil.


That’s everything we had regarding whether granite needs to be sealed. The visual appeal of granite countertops is incredible.

If any problem persists after sealing, seek expert help.

Best of luck!