WHETHER YOU ARE SHOPPING for your first granite countertops or have owned them for some time, you probably know that granite is commonly sealed for protection against bacteria growth, water marks and staining. But trying to find out how often to reseal can be confusing. You may hear recommendations ranging from every three months to every five years or more. The truth is, there is no one-size-fits-all answer, but here is some vital information you should know before you buy granite countertops or if you have granite that may need resealing.

Why Is Granite Sealed?

Granite has pores, tiny spaces through which liquids and oils can enter. Think of all the liquids and oils your countertops are exposed to! Stains and discolorations occur when oils and liquids enter the pores of the granite. Sealing acts as a first line of defense, allowing you more time to clean up spills before the substance can be absorbed into the granite. But as the Natural Stone Institute says, “Sealing does not make the stone stain proof, rather it makes the stone more stain resistant.”

How Is Granite Sealed?

As countertopspecialty.com explains: “Sealers, also called "impregnators" are composed of a resin dissolved in water or a petroleum-based solvent. The granite sealer is applied to the stone creating a film and left on the surface long enough for it to be absorbed into the pores of the stone. Resin clogs the pores. Excess sealer is wiped off the surface and the water or solvent base evaporates leaving the resin to dry and harden creating the barrier.”

How Often Does Granite Need to Be Sealed?

Since it’s the porosity of granite that makes it susceptible to stains, it’s important to understand that not all granite has the same level of porosity. We might liken it to the difference between your skin and a sponge. Both are porous, but not to the same degree. Because some granite is less porous with more natural resistance to stains, the homeowner may choose to have it sealed less often or not at all. 

At WilgusIQ, we can help you evaluate which slabs have a greater or lesser need for sealing before you buy. If you are browsing our online granite selection it might be helpful to know that darker colors are generally denser and therefore less porous.

If you have granite countertops that need periodic attention, you can cut down on the number of times they are resealed by following recommended cleaning practices and avoiding chemicals that wear away the protective layer (click here for WilgusIQ’s free granite care guide). Investing in a long-lasting sealant may also be a practical choice.

How Do I Check If My Granite Needs Resealing?

The standard way to check if your granite countertops need resealing is by pouring a tablespoon of water on several places along the surface. If the water is absorbed quickly, the granite needs to be sealed. WilgusIQ provides professional granite sealing at an affordable price. For more information, click here to contact WilgusIQ.