A granite gravestone or memorial stone is more than just an object—it's a place of reflection, remembrance, and often an expression of love for a deceased loved one. To ensure this place remains beautiful and dignified over time, it's important to properly care for the natural stone used. Fortunately, granite is one of the most robust and easy-care materials for outdoor use.
Whether as a gravestone, memorial stone, vase, or bowl – properly cared for granite will retain its natural beauty for many years. In this article, you'll learn how to professionally clean and protect granite, what to avoid at all costs – and why less is often more.
Why granite is so easy to care for
Granite is an igneous rock formed deep within the Earth's interior, characterized by its enormous hardness, density, and weather resistance. Unlike softer natural stones like marble or sandstone, granite absorbs very little moisture and is virtually impervious to frost, heat, and UV radiation. Polished granite surfaces are also particularly smooth, so dirt, moss, and pollen hardly adhere.
These properties make granite an ideal choice for gravestones and decorations exposed to wind and weather year-round. However, even the hardest material needs occasional attention—especially if the stone is permanently outdoors.
Regular cleaning – gentle and effective
We recommend gently cleaning the granite two to four times a year – ideally in spring and autumn, and as needed after heavy pollen counts or persistent rainy weather.
Here’s the best way to proceed:
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Use only warm water – no hot temperatures, no additives
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A soft cloth or sponge is sufficient
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For light soiling, a microfiber cloth or cotton cloth is ideal
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For heavier deposits, a soft natural brush (e.g. horsehair) can be used
Deposits of pollen, leaves, or bird droppings should be removed as quickly as possible before they become embedded. This will keep the polished surface shiny and even for a long time.
You should avoid these cleaning products
Many commercially available cleaners are not suitable for granite, even if they are advertised as "universal" or "biodegradable." Particularly harmful are:
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Acidic agents (e.g. vinegar cleaner, citrus cleaner, toilet cleaner)
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Products containing surfactants (dishwashing liquid, soapy water, household cleaners)
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Scouring milk or cleaning powder
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High-pressure cleaner or steam cleaner
These agents attack the granite's surface , removing its natural structure and can cause permanent stains, streaks, or loss of shine. Even products considered "stone-compatible" should be tested on an inconspicuous area first.
The right special cleaner
For more stubborn dirt—such as moss, soot, limescale, or bird droppings—we recommend special oil-based or neutral stone cleaners. These are designed for natural stones like granite and will not damage the color or structure of the stone. Please note the following characteristics:
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pH-neutral (between 6.5 and 7.5)
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solvent-free
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without moisturizing or foaming additives
Such a cleaner is usually diluted with water, applied with a sponge or cloth, and wiped off after a short exposure time. Any residue is then rinsed off with clean water.
Impregnation – protection for many years
Impregnation protects granite from the penetration of dirt and moisture, makes it easier to maintain, and extends its lifespan. It forms an invisible film over the stone's pore structure—without compromising its breathability.
What is important is:
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Only impregnate after thorough cleaning
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Stone must be completely dry (at least 24 hours without rain)
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Apply with a soft cloth or roller , polish after a few minutes
Depending on the product and weather conditions, the effect lasts between two and five years. Retreatment is recommended if water repellency decreases.
Home remedies – less is more!
Some guides recommend household remedies like ammonia solution for cleaning or freshening up dull spots. In fact, ammonia—highly diluted—can help with stubborn grease or soot stains. However, it's important to remember:
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Apply only to small areas
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Ventilate well, as ammonium chloride has a strong smell
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Always clean with clean water
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If necessary, polish with some floor wax
We recommend this method only for polished granite and only in exceptional cases—e.g., when no other cleaning agents work. Please avoid using baking soda, citric acid, or baking powder—these will damage the surface.
In winter – well prepared
Granite is frost-resistant, but standing water in vases or bowls can cause damage during frost. Therefore, the following applies:
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Remove plant inserts and store in a dry place
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Vases and containers tip over when not in use
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Cover grave lights or use LED candles in case of strong temperature fluctuations
Road salt in the vicinity can also damage the stone – so when it snows, it is better to use a broom instead of salt.
What to do if there are stains or discolorations?
Despite all the care, stains or discoloration can occur – for example, from candle wax, rust, organic residues, or copper leaching. Here's how to help:
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Oil stain remover (e.g. for wax, resin or grease)
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Rust remover for natural stone (without acid!)
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Biological algae and moss removers
Test each product first on an inconspicuous area and wait 1-2 days for visible changes. If the stone continues to appear dull or spotty, we'll be happy to provide you with a professional assessment. In some cases, a color intensifier may also be able to provide relief.
Conclusion: Less is more – and caution pays off
Granite is durable, robust, and easy to maintain—but even this noble natural stone requires attention. Those who avoid harsh cleaning agents, regularly clean the stone with warm water, and occasionally waterproof it will enjoy a well-maintained, dignified memorial for many years to come.
With the right knowledge, a little patience, and the right tools, you can preserve the beauty of your gravestone—and at the same time honor the memory of a special person.
Please feel free to contact us – we will advise you honestly, competently and personally.
