How to Remove Stains and Discoloration from Granite

Most people think granite will never stain. They are wrong. All granite species are porous and their porosity varies from granite species to species. Food and beverage spills, especially that of greasy foods and cooking oils, can stain a granite surface over time. Hair dyes, colored toiletries, paint and stain pigments – the colorants contained in chemicals, when spilled on granite, will seep into the granite’s pores and discolor the surface.

It’s important to be aware that this is normal and typical for all granite countertops and granite islands in the kitchen. Over time (usually in excess of one year), improper cleaning (such as not completely removing food and beverage spills or residue contained in smoke from cooking) attacks the granite’s color and clarity. As a result, the granite’s surface becomes much darker in color compared than when it was new.

The Solution to Remove Stains from Granite

We have finally developed a Granite Poultice, which removes deeply embedded stains and discoloration from kitchen granite countertops and islands. Our Granite Poultice is specifically formulated to work below the granite’s surface and pull out grease and oil, plus food and beverages that have penetrated into the granite pores. Watch those dark, dull, and discolored areas of your kitchen granite countertops and islands disappear and come back to life. Your granite will look as beautiful as it did on the day your granite was installed.How to Remove Stains from Granite

Granite Poultice is quick and easy to use; restoring the original color and clarity to granite countertops and islands. The product usually takes about 24 hours to fully remove stains from granite, depending upon the age, depth, and severity of the granite’s discoloration and staining.

How to Use Granite Poultice Remove Stains & Discoloration

Our Granite Poultice is highly effective at removing stains from granite. Follow these do-it-yourself instructions below.

  1. First, mix the granite poultice with lacquer thinner to the consistency of cookie dough (lacquer thinner can be found at hardware and paint stores).
  2. Next, use a rubber, wood, silicone, or plastic spatula, to spread the granite poultice over the discolored or stained granite surface to a thickness ranging between 1/8 to ¼  inch (similar to a pancakes thickness).
  3. Tightly cover the granite poultice with plastic wrap, or use plastic sheeting applied to the granite surface with duct tape. The idea is to make the granite poultice airtight, enabling granite poultice to maximize its penetration into the granite pores and pull out grease and oil that’s stained the granite surface.
  4. Keep the granite poultice in place for a minimum of 24 hours in order to get the best results. For extremely discolored or stained granite areas, it may be necessary to keep the granite poultice in place for two or three additional days. (In some cases of deeply stained granite, a second application of granite poultice is necessary.)
  5. Next, after removing and discarding the granite poultice, it is quite common for granite countertops and islands to appear darker than normal. This is because moisture from the granite poultice has not fully evaporated out of the granite’s pores. It usually takes a few days for the evaporation process, and the granite’s normal color, clarity, and gloss will be fully restored.
  6. After removing and discarding the granite poultice, use our granite cleaner NeutraClean for Granite to clean the restored granite area, then seal this granite area with our granite sealer Granite Guard Protector (SB), then polish this granite area, with our granite polish Granite Polish and Protector. Our granite cleanser, granite sealer, and granite polish, are all included in our Granite Maintenance Kits along with additional items to clean, seal and protect your granite.

granite poultice

Our Granite Poultice is very economical and easy to use. Use one pound of granite poultice to restore two square feet of granite. You can learn more about this product by clicking here.


This article is in response to a question from Rhonda, received 10/05/08.

Understanding Your Granite

When it comes to selecting the appropriate material for kitchen countertops, island tops, table tops, and bar tops; bathroom vanity tops and shower walls; granite is an excellent choice. There are hundreds of granite species to choose from, all are quite hard (Mohs hardness scale) because of there mineral makeup of quartz and silicon dioxide, and are much more resistant to alkaline and acidic encounters than marble.

Some of the more popular misconceptions about granite are: to purchase granite instead of marble, because granite is indestructible; beware: both granite and marble will crack if not installed properly, the underside of the granite section located in front of the kitchen sink should always be reinforced with steel (rods/bars) to prevent breakage, it’s always best, to fabricate the granites’ outside edges to be rounded, next best, would be to bevel the granite outside edges, the least desirable granite edge would be square outside edges, because they will chip over time (especially the inner granite edges above the under mount sink, due to pots and pans, dinnerware and silverware).

Most people think granite can not be scratched because it is so hard, they are 100% wrong, granite does scratch and the scratches can be eliminated by a resurfacing process (honing/sanding); but, the re-polishing process in the field has not been perfected yet. To re-polish the granite to its original factory finish (color, clarity, and gloss) in the field is extremely difficult and most of the time impossible because of physics and chemistry. Current technology for polishing granite in the field yields approximately 60% to 90% of the factory finish, depending upon the granite’s species, and the personnel’s equipment and experience.

Concerning granite floors: we do not recommend using granite because of the aforementioned refinishing issues and exorbitant expense. Marble flooring is a good choice, the refinishing (resurfacing) process for removing scratches, stains, etchings and dull spots; then, restoring the factory finish (color, clarity, and gloss) to the marble’s surface in the field, is a proven technology. We sell marble refinishing kits which are all inclusive, easy to use, and economical.

Many people think granite does not stain easily, however this is a major misconception. All granite species are porous and their porosity varies from species to species. Using harsh cleaners, abrasive pads and powders over time will dull the granite’s finish. Food and beverage spills, especially greasy foods and cooking oil will stain the granite’s surface. Many times, consumers are told by their sales person or installer that their granite was sealed at the factory or fabrication shop prior to installation. Beware: most granite factories and granite fabricators do not use a premium grade, deep penetrating (impregnating) granite sealer. We have tested over the past five years, granite sealers that supposedly come with a lifetime warranty. The test results are not favorable for two primary reasons: their chemistry does not allow the granite surface to breath, which will have a detrimental effect over time with the granites’ clarity; secondly, these granite sealers change the granite’s appearance (giving the granite an artificial look).

Here’s some good news about granite: granite is so easy and economical to maintain. Using a granite cleaner routinely is a must, a credible granite cleaner should be formulated as follows: be neutral on the PH scale, so it won’t have a negative effect on the granite’s color, clarity, or gloss; be able to break through surface deposits and disinfect, have a pleasant smell. We recommend twice a year for kitchen granite countertops, island tops, table tops, and bar tops; bathroom granite vanity tops and shower walls, applying a premium granite sealer followed by the application of a premium granite paste polish. This process is so simple and fast to do, just like washing and waxing your car. For those of you, whose granite kitchen countertops are dull and dingy, maybe showing their age, don’t worry. Granite does not show its age, it took over a billion years for granite to be formed, and 99% of the time what is making your granite look dull and dingy is a surface film that has built up over time from not using a proper cleaning and spreading food and beverage spills over the granite’s surface because these spills were not removed completely from the granite’s surface initially.

Another contributing factor might be the application of an inferior granite sealer. Many of our competitors sealers don’t have the ability to penetrate deeply into the granite’s subsurface and these inferior granite sealers contain a high concentration of polymer solids that stay on the granite’s surface. These polymer solids attach themselves to the granite surface and are extremely difficult to remove, plus they create a cloudy film which distorts the granites’ color, clarity, and gloss. We sell a granite maintenance kit which is all inclusive, really quick and super easy to perform; a typical kitchen with granite countertops takes about 1 hour of actual work time to clean, seal, and polish (you need to allow a minimum of 30 minutes for the granite sealer to penetrate) prior to polishing the granite; also, allow another 15 minutes of work time if you have a granite island in addition to your granite countertops.

In conclusion, remember to use common sense around your granite: don’t cut anything on your granite; don’t use harsh cleaners or abrasive powders on your granite; dedicate a section of a kitchen granite counter top as a food preparation area and have this food prep area covered with “butcher block” or plexiglass for example; be sure to pickup food and beverage spills as soon as they happen. Purchasing your granite was expensive, be sure to protect your investment and keep your granite looking brand new and beautiful (year round) by using proper granite maintenance products which clean, seal, and polish your granite. We welcome responses to our articles and will try to answer comments and questions in a timely fashion.