You don't have to rush to add a further preservative treatment to your product as it's safe and protected from rot. Some customers decide not to treat their product at all, and just leave it to naturally weather and season. However, we recommend the use of a furniture oil periodically to help moisturise the wood and help to delay the aging process. If left untreated, the wood will fade in colour turning either a light grey/silver or a darker grey in places over time. On odd occasions some parts of the timber can turn a blackish shade. Differences in how the appearance of the wood changes can depend on variables such as location in the garden, exposure to weather, exposure or lack of exposure to sunlight, and natural differences in the wood. Over time, every piece will have its own unique look. Built from premium quality pressure-treated timber (which prevents rot for up to 20 years), this is a set you can rely on every time the sun comes out. Solid and sustainable Made from thick tanalised timber Handmade in the UK Comfortable seating for eight Ergonomic design Pressure-treated to prevent rot for up to 20 years Height: 77cm Width: 149cm Depth: 149cm An attractive and high quality table accompanied by four sturdy and high quality garden benches, all ergonomically designed with lumbar support.