DuPont Home

Protect FAQs

How can I tell if my stone has already been sealed?
Apply a drop of water at least ½-inch in diameter to the top of the stone and let stand for at least 15 minutes. Cover with a glass to inhibit evaporation. If the stone did not darken then your stone is probably sealed against water-based stains. Testing for oil repellency is not as simple because if your stone is not sealed, you will have an oil stain.

How much time between coats of sealer?
Always follow your label directions. Most sealers require waiting only one hour between coats. Be patient, a little extra time can produce excellent results.

How often do I need to seal my stone?
If you sealed your stone with StoneTech® Professional sealers and have maintained it with StoneTech® Professional daily cleaners your sealer should last up to 3-5 years.  Use and ongoing maintenance greatly affect sealer durability.

Is one coat of sealer enough for natural stone?
When sealing a very dense stone, one coat will be sufficient. Most stones and grout will require two coats. A few of the more absorbent stones may need additional coats to be properly sealed. Your StoneTech® retailer or your stone distributor will be able to assist you in determining your needs.

What is a sealer?
A sealer is like a coat of armor for your stone, tile or grout. Our sealer will decrease the opportunity that anything can stain or harm your surface. We believe that you should always use an impregnation sealer allowing you to retain the natural beauty of the surface.

What is an impregnating sealer?
A sealer is like a coat of armor for your stone, tile or grout. A sealer will decrease the opportunity that anything can stain or harm your surface. At StoneTech® Professional, we promote the use of impregnating sealers, allowing you to retain the natural beauty of the surface.

Why does my granite stain?
Granite is like any other natural stone; it can be dense or porous and is absorbent to some degree. Stones that have more swirls or veins tend to be more porous and absorbent.  These swirls and veins show the movement of the stones active molten history. Generally, stone with smaller crystals are more absorbent than granites that have large crystals.

Why should I seal my natural stone?
Protected stone will be easier to clean, resist staining, and provide a safer and healthier environment. Considering the investment, why wouldn't you provide the surface with the maximum protection possible?

Why should I seal my tile and grout?
Protected tile and grout will be easier to clean, resist staining, and provide a safer and healthier environment. Considering the investment, why wouldn't you provide the surface with the maximum protection possible?

Will my natural stone look glossy after sealing or enhancing?
No, unless you selected a topical, high gloss sealer such as High Gloss Finishing Sealer . If properly applied, impregnating sealers will leave your surface looking natural. Enhancing sealers are designed to darken the stone while retaining the original polished, matte or honed look.

Is it really necessary to seal stone outdoors? What do I need to protect against?
Outdoors can be very harsh on your stone. There are things that can affect your stone that are visible, like pollen and dirt, and then there are things that are not quite that easy to see like UV Rays. You make an investment to your home by putting natural stone in your yard, so it would be worth it to seal the stone and preserve its natural beauty. Sealing with our sealers will give you maximum protection against rain, other chemicals, oils from trees and plants, and all of those wonderful and fun-filled outside barbeques. We have a variety of sealers to choose from. We have sealers that will preserve your natural look, sealers that will enhance the natural look, and high gloss lacquer to give it that immaculate shine. As the home owner you need to decide what look you would like to achieve.

What type of sealers protect against stains on outdoor stone and what can withstand constant sun?
If your stone is going to be under the UV Rays or dealing with different weather conditions, we would recommend using the Heavy Duty Exterior Sealer, which has excellent water repellency. If there will be an area that needs more oil repellency in addition to water repellency, you could wait 24 hours after your first coat of Heavy Duty Exterior Sealer and apply one coat of Heavy Duty Stone Sealer or Impregnator Pro® Sealer.

Note: The information is furnished free of charge and based on information that DuPont believes to be generally reliable and accurate. Individual facts and circumstances may differ. It is intended for your use, at your own risk. Because conditions of use are outside our control, we make no warranties, express or implied, and assume no liability in connection with any use of this information.