5 Best Wood Preservatives for Fences, Sheds & Decking (2021 Review)

The Cuprinol Wood Preserver is the best wood preservative for sheds. This colourless preservative can be used both inside and out, actively preventing rot and decay. It’s perfect for keeping your garden shed in good-as-new condition.

This preserver can be used as a base coat before painting, staining or varnishing. It takes 1-5 days to dry depending on weather conditions, and it’s low odour so barely noticeable. It comes in a 5L package which can cover up to 5m squared.

The Ronseal Wood Preserver offers long lasting protection for any interior or exterior wood. It can be used on both rough and smooth timber; simply apply one coat and allow to dry, before applying the second.

This wood preserver will prevent decay and rot, offering long lasting protection. It can be applied by brush, sprayed or dipped and is the perfect preserver for garden furniture, sheds and fences.

The Sikkens Wood Preserver is the best wood preservative treatment for a semi-gloss finish. This wood preserver can be used as both a base stain or a finishing coat. It’s completely translucent, designed to bring out the beauty of the wood, and lasts for a long time.

This preserver protects against mould, algae and UV rays. It’ll also prevent your wood from peeling and cracking. It’s available in a gorgeous light oak finish and can be used on both interior and exterior wood.

The Sika Wood Preserver is the best exterior wood preservative, offering protection against insects, eggs and larva. This penetrates deep into the wood for long lasting protection, both preventing and treating wet and dry rot.

This triple action preserver is available in 1L, 2.5L and 5L depending on how much wood you have to treat. It’s solvent free with minimal odour, and it’s extremely easy to apply with a brush.

Arguably the best wood preservative for decking is the Roxil Wood Protection. Unlike many other preservers, this waterproofs the wood as well as protects it, so it’s ideal for outdoor areas like decking that might get a lot of rainfall.

This preserver reduces organic growth including mould and algae. It protects the wood from warping and improves stability, with these effects lasting up to 10 years. It’s very easy to apply, with just 2 coats needed within 30 minutes.