The Hidden Dangers of Stone Sealer Impregnators on Countertops

Frederick M Hueston  StoneForensics.com

If you’ve recently invested in beautiful stone countertops, like granite or marble, you might be considering sealing them to protect against stains and damage. Stone sealer impregnators are commonly used for this purpose, as they penetrate deep into the stone, providing a barrier against liquids, oils, and other substances that could cause discoloration. But before you reach for that bottle of sealer, it’s important to understand the potential dangers that come with using these products—especially in your kitchen.

What Are Stone Sealer Impregnators?

Stone sealer impregnators are designed to penetrate the porous surfaces of natural stone, filling in tiny crevices to create a protective barrier. They’re great at keeping stains from seeping into the stone, but the ingredients in these sealers can sometimes be less than ideal, particularly when it comes to our health.

The Problem with PFAS

One of the most concerning issues with some stone sealer impregnators is the presence of per- and polyfluoroalkyl substances (PFAS). These are a group of man-made chemicals that have been used in a variety of products for their water- and grease-resistant properties. You might have heard them referred to as “forever chemicals” because they don’t break down in the environment and can accumulate in our bodies over time.

PFAS are linked to a range of health issues, including hormone disruption, immune system effects, and even an increased risk of certain cancers. When used in sealers, these chemicals can potentially off-gas or leach into food and air, especially when the countertops are used for food preparation. This is a particular concern in kitchens where food is often prepared directly on the countertop surface.

Other Hazardous Chemicals

Aside from PFAS, many stone sealers contain other chemicals that could pose health risks. For instance, some products include volatile organic compounds (VOCs), which can evaporate into the air and cause respiratory issues, headaches, and other health problems. VOCs are often used as solvents in sealers to help them penetrate the stone more effectively, but their presence can lead to indoor air quality concerns, particularly in poorly ventilated spaces.

Is There a Safe Way to Use Stone Sealers?

The good news is that the risks associated with stone sealer impregnators are primarily present during the application and curing process. Once the sealer has fully cured, which typically takes a few days, the harmful chemicals are often locked in place, reducing the likelihood of exposure. However, this doesn’t mean the risk is entirely eliminated.

When applying a stone sealer, it’s crucial to follow the manufacturer’s instructions carefully and to ensure that the area is well-ventilated. Wearing protective gear like gloves and a mask can also help minimize exposure to harmful fumes. After application, it’s a good idea to avoid using the countertops for food preparation until the sealer has completely cured and any lingering odors have dissipated.

What Are the Alternatives?

If you’re concerned about the potential dangers of traditional stone sealer impregnators, there are alternative products on the market that are free from PFAS and other harmful chemicals. These eco-friendly sealers may not penetrate as deeply or last as long as their chemical-heavy counterparts, but they can still offer a decent level of protection without the associated health risks.

In addition, regular cleaning and maintenance of your stone countertops can go a long way in keeping them in good condition, potentially reducing the need for frequent sealing. Using gentle, stone-safe cleaners and promptly wiping up spills can help prevent stains and prolong the life of your countertops.

While stone sealer impregnators are effective at protecting your countertops from stains and damage, it’s important to be aware of the potential health risks associated with their use. Chemicals like PFAS and VOCs can pose dangers during the application process, but with proper precautions, you can minimize your exposure.

Once the sealer has cured, the risks are significantly reduced, but if you’re looking for peace of mind, consider exploring safer, alternative sealers that offer protection without the harmful chemicals. After all, the beauty of your stone countertops should be something you enjoy without worrying about what’s lurking beneath the surface.