The Truth About Sealers: Should You Seal Your Natural Stone Countertops?
Natural stone countertops—like granite, marble, and quartzite—are known for their timeless beauty and durability. But should they be sealed? At World Stone, we follow the expert guidance of the Natural Stone Institute, and here’s what you should know.
Why Seal at All?
Sealing natural stone isn’t always necessary, but in many cases, it’s a smart move. Some stones are more porous than others, meaning they absorb liquids and are more susceptible to stains. A proper sealant adds a layer of defense without compromising the look or feel of the stone.
The Two Types of Sealants
1. Topical Sealers
What they do:
These sealers form a protective film over the surface of the stone. They’re usually made from wax, acrylic, or other plastics and work well at resisting surface moisture and some staining agents.
Pros:
Quick and easy surface protection
Can add shine (in some finishes)
Cons:
Require frequent reapplication due to wear
Can change the appearance of honed or matte stones
Not ideal for most residential countertop applications
When to avoid:
Topical sealers are not recommended for honed or textured finishes. They can add an unwanted gloss and alter the stone’s intended aesthetic.
2. Impregnating (Penetrating) Sealers
What they do:
These sealers soak into the stone and bond below the surface. They don’t alter the finish but offer long-term resistance to staining by repelling liquids from within.
Types:
Water-based: Easy to apply, low odor
Solvent-based: Deeper protection and longer-lasting effects
Pros:
Won’t affect the natural appearance of the stone
Long-lasting protection
Suitable for kitchen and bath surfaces
Cons:
Slightly more complex application
Some solvent-based sealers may require proper ventilation during use
At World Stone, we apply a professional-grade solvent-based impregnating sealer to all qualifying surfaces during installation. This ensures the stone starts off with a layer of protection that can extend its life and keep it looking great.
How Often Should You Reseal?
There’s no universal answer. Depending on your stone type, usage, and sealant product, reapplication may be needed every 1–5 years.
A simple test:
Place a few drops of water on the countertop. If the stone darkens within 5 minutes, it’s time to reseal.
Choosing the Right Sealer
We don’t recommend a specific brand, but we do strongly advise that you:
Choose a sealer compatible with your specific stone
Ensure the product is non-toxic and food-safe if used in the kitchen
Follow the manufacturer’s instructions carefully for best results
Avoid mixing chemical products (e.g., bleach and ammonia)
Final Thought
Sealing doesn’t make your countertops indestructible—but it does make them more resilient. When paired with regular care and smart cleaning habits, sealing helps your stone stay beautiful and functional for years to come.
Have questions about sealing or maintaining your natural stone countertops? Contact World Stone today—we’re here to help.