For the best protection, apply an exterior wood preservative to protect against mould, algae, dry rot, woodworm and wood related diseases Oils often come in natural colours or clear, and enhance the natural appearance of your wood,' explains Jimmy Englezos, senior product manager at Sherwin-Williams.

Coverage: 1 coat up to 8 sq metres/litre of smooth timber and up to 5 sq metres on rough sawn timber, 2 coats recommended. We also deliver to the majority of non mainland UK locations including The scottish Highlands & islands, Isle of Man, Isle of Wight, Isles of Scilly and Northern Ireland. Please see full delivery terms for the extra charges associated with these locations It’s designed to penetrate deep into the wood to replace the natural oils lost over time through weathering, and to offer deep-seated protection against splitting and drying, while the tinted oil brings out the colour in greyed wood for a fresh look. Oil is also really durable and is easy to maintain – you just need to keep it clean and touch it up every now and then. It’s very resistant to dirt and water so doesn’t require much upkeep at all.'Not to mention that it replenishes some of the natural wood oils that have been lost due to a variety of factors. Colours: The colour swatches are an indication only and representative of the product applied to clean new/pale timber. The final colour finish can vary considerably due to the age, type & condition of the timber being treated. We always recommend carrying out a test area first in an inconspicuous area to make sure you are happy with the final dried colour. We recommend using the clear version, as it delivers a beautifully natural finish. The same can't quite be said about the teak colour, as it's a little orange. If it doesn't bead, you'll be ready to put on the oil. If it does then you'll have to clean it again until the water stops beading.