How Often Should I Seal Granite Countertops

January 5, 2010 | by Ethan (email) |

Granite CountertopSealing your granite countertop will protect your countertop and ensure it stays beautiful. Granite is a great kitchen countertop material (comparison review) but it is porous. That means that spills can seep in causing stains and discoloration. It was time to re-seal my countertops so that’s a project I tackled the other day. Knowing when to seal / re-seal your granite is an easy matter. Read on for special considerations and a simple way to test your granite seal.

Manufacturers Granite Sealer

Some manufacturers will incorporate a sealant into the production process. The longevity of these sealants varies from 10 to 15 years or even permanently. For example, Home Depot provides a limited 15 year warranty that includes staining. Double check with your manufacturer and pay close attention to any cleaning stipulations. Often, 10-15 year sealants require that you clean up spills immediately with specific cleaning agents.

When to Seal Your Granite Countertop

If your granite is taking in color from spills that is an obvious sign that you are overdue but it’s much more ambiguous for other scenarios. Here’s a quick test to determine the quality of your seal.

Water Drop Test

  • Series of water drops
    Put down a series of 4 small pools of water. They don’t need to be large- maybe 2 mL or so. Place them nearby each other. You’ll have to repeat this test for other areas of the countertop.
  • Start the timer
    Once the water is in place start a timer. You’ll need about 30 minutes total.
  • Wipe up the water
    Wipe up the water at these time intervals. 


    • Almost immediately
    • At 5 minutes
    • At 15 minutes
    • At 30 minutes

    You’re looking to see if the granite is darker because water made its way into the stone. Any discoloration will be gone after the water has evaporated.

If your countertop makes it the whole 30 minutes without any darkening, you’ve got a strong full sealant and have nothing to worry about. If the water darkens your countertop within 5 minutes, you should apply a sealant in the very near future.

How Often Should I Apply Granite Sealer

Many manufacturers suggest applying a sealant about once a year. I’ve used Stone Care International Sealant (official site) and found that I need to re-apply after about 1.5 years.

What do you think? What sealant do you use?
Image courtesy of Allen Chu

2 Responses
  1. tyrone Jimerson says:

    My name is Tyrone Jimerson . I would like to know if you have Chocolat truffle 1 1/4 : 27″x80″ quartz available and what brands you happen to carry. I am looking for inexpensive ones. Could you please let me know the prices that are
    Bath Vanity Nominal Dimensions: 41-1/2″ x 21-1/4″ x 35″(1054mm x 540mm x 889mm)Bowl Sizes: 19-1/4″ (490mm) x 12-3/4″ (325mm) front-to-back x 7-3/4″ (197mm) deep.pine lumbers
    5″ x 2-1/4″ Pine Bun Foot.

    I would be happy to make my payment by credit card if you accept them.

    I await your reply,
    Tyrone Jimerson

  2. mary says:

    I have granite counter tops and table top – recently I notice tiny holes in the granite where the stone has different pieces. These pieces look like they are chips of glass (just as a description). What can I do to seal or fill these tiny holes?

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