Congratulations on your new wooden garden benches! Protecting them with the right finish is crucial for longevity and beauty. The "best" finish depends on your wood type, desired look, and maintenance willingness.
For dense, oily woods like teak or ipe, a teak oil or specialized hardwood oil is ideal. It nourishes the wood, enhances its natural color, and offers decent water resistance without forming a peeling film. Reapply annually.
For most common bench woods like pine, cedar, or oak, a spar urethane or marine-grade varnish provides superior protection. These finishes create a durable, flexible barrier against UV rays, rain, and temperature swings. Apply multiple thin coats for best results.
If you prefer a low-maintenance, natural look that grays gracefully, consider a penetrating outdoor wood sealant. These oil- or water-based products soak into the wood, repelling water while allowing the bench to weather naturally without cracking.
For ultimate eco-friendliness, pure tung oil or linseed oil are classic choices. They deeply penetrate, highlight the grain, and are non-toxic. However, they require more frequent reapplication and offer less UV protection.
Always start with clean, dry wood. Lightly sand if needed. Apply the finish generously with a brush or cloth, following the grain. Allow proper drying between coats. With the right finish, your benches will remain a beautiful and welcoming retreat for many seasons to come.