Does Manufactured Stone Need Sealing?

Manufactured stone veneer (MSV) is a popular choice for adding the beauty of stone to both interior and exterior spaces without the hefty cost or weight of real stone. It’s durable, versatile, and comes in a wide range of colors and textures, making it a great option for many homeowners. But one question that often arises is: Does manufactured stone need sealing? The short answer is: not always, but it’s highly recommended in certain conditions. Let’s explore why you might want to seal your manufactured stone and the factors to consider.

Why consider sealing manufactured stone?

Manufactured stone veneer is made from a blend of cement, aggregates, and pigments, making it a durable yet porous material. Although it’s designed to withstand the elements, sealing can add an extra layer of protection to ensure longevity and maintain its appearance over time.

Protection from moisture

Manufactured stone veneer is more porous than natural stone, which means it can absorb water more easily. If the stone is exposed to excessive moisture (especially in exterior applications), it can lead to issues like efflorescence - this is when water moves through the stone and brings salts to the surface, leaving behind unsightly white stains. It can also lead to issues like mold and mildew - in damp environments, moisture trapped in the stone can promote the growth of mold and mildew, particularly in areas with poor ventilation. Sealing your manufactured stone can help prevent water absorption, reducing the risk of these moisture-related issues.

Stain resistance

In both interior and exterior settings, manufactured stone can be susceptible to staining. Common stains include: dirt and grime in outdoor applications, grease and food stains around kitchens or fireplaces, and water spots and mineral deposits in areas near water features. A high-quality sealer creates a protective barrier that helps repel dirt, oils, and other contaminants, making the surface easier to clean and maintain. For areas like kitchens or patios, where staining is more likely, sealing is especially useful.

Preserving color and appearance

Manufactured stone veneer gets its color from pigments added during the manufacturing process. Over time, exposure to sunlight, UV rays, and weathering can cause the color to fade or discolor. While MSV is designed to be resistant to fading, applying a UV-protective sealer can help preserve the stone’s vibrant colors longer, especially for exterior installations.

Longevity

By sealing your manufactured stone, you can extend its lifespan by protecting it from the elements. A properly sealed surface is less likely to degrade due to moisture, staining, and weather exposure, which means your investment will last longer.

When should you seal manufactured stone?

While sealing manufactured stone isn’t always necessary, there are certain situations where it’s highly recommended: 

1. Exterior applications: for outdoor installations, whether it’s on the façade of your home, a patio, or a garden wall, your stone veneer will be exposed to the elements. Rain, snow, freeze-thaw cycles, and UV rays can all take a toll on the stone over time. Sealing your MSV in exterior environments is an effective way to protect it from moisture infiltration and fading due to sun exposure.

2. High-traffic areas: areas that see a lot of use, such as outdoor kitchens, fireplaces, or entryways, are more prone to spills, stains, and wear. Sealing in these high-traffic zones can help maintain the stone’s appearance and make cleaning up easier.

3. Wet areas: if your manufactured stone is installed in areas exposed to water, such as near a pool, fountain, or even in a bathroom, sealing is essential to prevent water absorption. The sealant will act as a barrier, reducing the chances of moisture penetration, mold growth, and efflorescence.

4. Harsh climates: homes in regions with extreme weather conditions, whether it’s heavy rain, snow, or intense sunlight, can benefit from the added protection of a sealer. The sealer will help protect the stone from damage caused by freeze-thaw cycles and intense UV exposure.

Choosing the right sealer for manufactured stone

Not all sealers are created equal, and choosing the right one is essential for effective protection. Here are some things to consider:

1. Water-based vs. solvent-based sealers: water-based sealers are typically more environmentally friendly and easier to apply. They dry quickly and can provide excellent protection without altering the appearance of the stone. Solvent-based sealers tend to offer stronger protection and are more durable, but they may leave a glossy or darker finish, which might not suit all design preferences.

2. Penetrating vs. topical sealers: penetrating sealers absorb into the stone, providing protection from within. They don’t change the appearance of the stone and are often preferred for exterior applications. Topical sealers create a protective layer on the surface of the stone. They can provide a glossy or matte finish but may require more frequent reapplication as they are more prone to wear and tear.

3. UV protection: if your manufactured stone is exposed to direct sunlight, look for a sealer with built-in UV protection to help prevent color fading.

How often should you seal manufactured stone?

The frequency of resealing depends on the sealer used and the conditions the stone is exposed to. Generally, outdoor installations may need to be resealed every 2 to 3 years, while interior applications could go longer without needing resealing. Be sure to check the manufacturer’s recommendations for the specific sealer you use, as some offer longer-lasting protection than others.

Does manufactured stone need sealing?

While manufactured stone doesn’t always require sealing, doing so can offer significant benefits in terms of protecting it from moisture, stains, and weathering, especially in exterior or high-traffic areas. The right sealer can extend the life of your stone veneer and keep it looking beautiful for years to come. If you want to maximize the longevity and appearance of your manufactured stone, sealing is a smart step to consider.

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The Black Bear Mountain Stone Team