We use the latest proven technology available to protect wood against the elements. Its unique blend of modified oils and resins is formulated to repel water and resist the impact of UV light, and contains anti-mildew and anti-fungal additives that resist graying during the life of the stain. It also cures faster than other stains, making it the recommended product for decks or any surface that will be walked on or tracked. It carries a two-year warranty and often lasts up to four years, depending on the application rate. Even tho, we recommend restaining every two years and taking care of the fence all year long.