Sunscreen for Your Outdoor Stone Surfaces
By Fred Hueston
As stone professionals, we know that outdoor stone installations—barbecue tops, pool surrounds, and patio surfaces—face a unique set of challenges. Chief among them is exposure to sunlight, especially ultraviolet (UV) radiation, which can wreak havoc on the appearance and integrity of resin-treated stone.
Understanding UV Damage in Outdoor Stone
Many outdoor granite countertops and pool surrounds are resin-treated during fabrication to fill natural voids and enhance the stone’s polish and color consistency. While this treatment is vital for durability and aesthetics, it also introduces vulnerability. Those resins are particularly sensitive to UV light. Over time, UV exposure can cause resin-treated stone to discolor—either darkening or lightening depending on the type of stone and resin—leading to an uneven, unattractive surface that frustrates homeowners and professionals alike.
Solutions for UV Protection
- UV-Protective Coatings
Some of the latest automotive ceramic coatings on the market contain advanced UV inhibitors. These products, though originally developed for car exteriors, can be carefully applied to outdoor stone surfaces as a sacrificial layer that blocks UV rays from penetrating the resin. A thin, even application can help preserve the original color and finish.
- High-Quality Stone Sealers with UV Stabilizers
Certain premium stone sealers now include UV stabilizers in their formulations. These sealers can provide an additional layer of protection by reflecting or absorbing UV rays, reducing the risk of resin breakdown and discoloration.
- Shade Solutions
Encouraging clients to consider shade structures—like pergolas, umbrellas, or strategically planted trees—can dramatically reduce direct sunlight on outdoor stone installations. This not only enhances the aesthetic but also extends the life of the stone.
- Regular Maintenance and Reapplication
Like any protective treatment, UV-blocking products require maintenance. Educate your clients on the importance of periodic reapplication, depending on exposure levels and the specific product used. Establishing a maintenance schedule ensures ongoing protection and customer satisfaction.
- Light-Colored Stone Selection
When appropriate, recommend lighter-colored stones for outdoor areas. While not a substitute for proper protection, lighter stones naturally reflect more sunlight, reducing the heat and UV stress on the resin.
Outdoor stone surfaces are a major investment for homeowners—and a source of pride for us as professionals. Protecting resin-treated stone from UV damage is essential for preserving its beauty and durability. By incorporating UV-protective coatings, recommending premium sealers, and educating clients about shade solutions and maintenance, we can keep these surfaces looking their best for years to come.
