Keeping your wooden park benches looking great and structurally sound is all about proactive care. The frequency for staining or sealing depends heavily on your local climate, the type of wood, and the product used. As a general rule, you should plan on inspecting benches annually and applying a fresh coat of sealant or stain every 1 to 3 years.
In harsh climates with intense sun, heavy rain, or snow, yearly sealing might be necessary. In milder conditions, a high-quality sealant can last 2-3 years. Look for telltale signs that it's time for maintenance: the wood appears gray and dry, water no longer beads on the surface, or the finish is visibly peeling or cracking.
For best results, always start with clean, dry wood. Use a dedicated wood cleaner or a mild bleach solution to remove mildew and dirt. Lightly sand any rough areas before applying a new coat. Choose a product designed for outdoor use—a penetrating oil-based sealant protects against moisture, while a stain with UV inhibitors adds color and fights sun damage. Consistent maintenance every few years is far easier and cheaper than replacing a rotted bench.