Sealing is the one piece of granite maintenance every owner should know — and it is far easier than most people fear. A good seal keeps liquids from soaking into the stone and staining it, and the whole job takes just a few minutes a year. Here is exactly how to seal granite countertops and how to know when it is time.
Why granite needs sealing
Granite is a natural stone with microscopic pores. Without a sealer, liquids like wine, oil, and juice can slowly seep in and leave stains. A sealer fills those pores and creates a barrier that gives you time to wipe spills away before they penetrate. Sealing does not make granite bulletproof, but it dramatically reduces the risk of staining.
The water-drop test: do you need to seal?
Before sealing, check whether your granite actually needs it. Drop a small puddle of water on the surface and wait about 15 minutes. If the water beads up or sits on top, your seal is still good. If the stone darkens where the water sat, or the water soaks in, it is time to reseal. Test a few spots, since wear varies across the counter — areas around the sink and stove tend to need it first.
How to seal granite, step by step
The process is simple: First, clean the counter thoroughly with mild soap and water and let it dry completely — sealing over dirt traps it. Second, apply a quality stone sealer evenly across the surface following the product directions, usually with a clean cloth or sprayer. Third, let it soak in for the recommended time (often 10 to 15 minutes). Fourth, wipe off all excess before it dries to avoid a hazy residue. Some products call for a second coat. That is it — your granite is protected.
How often to seal
Most granite benefits from sealing about once a year, though dense, dark granites may go longer and lighter, more porous stones may need it more often. Rather than guessing, let the water-drop test guide you — it tells you exactly when your specific stone needs attention. High-use zones near the sink and cooktop may need resealing before the rest.
Daily care between sealings
Between sealings, clean with warm water and mild dish soap and a soft cloth. Avoid abrasive pads, bleach, vinegar, and ammonia, which can wear down the sealer and dull the finish. Wipe up acidic spills promptly. This simple routine keeps the seal working longer. See our full countertop care guide.
Frequently asked questions
How often should I seal granite countertops?
About once a year for most granite. Use the water-drop test to confirm — reseal when water soaks in rather than beads.
Can I seal granite myself?
Yes. It is a simple, few-minute job with a quality stone sealer — clean, apply, let it soak, and wipe off the excess.
What happens if I do not seal granite?
It becomes more prone to staining from liquids like wine, oil, and juice that can soak into the unsealed pores.
Need help caring for your granite?
We are glad to advise. Contact us or call (615) 606-9593.