External Wood Treatments

Keep an exterior timber door looking its best by sealing it against the weather. These external door oils and coatings, from Osmo and Impranol, guard against rain, UV and moisture, so the door resists fading, swelling and cracking. Clear or tinted, they suit both oak and hardwood.

Impra Color Protective Coating

£25.95 (inc VAT)

Osmo UV Protection Oil Extra

£31.95 (inc VAT)

Osmo UV Protection Oil Oak Extra

£34.95 (inc VAT)

External Wood Treatments for Timber Doors

An external timber door only keeps its looks if it is protected from the weather, and the right treatment is what makes the difference. Our external wood treatments bring together the door oils and finishes built for outdoor use. They guard exterior timber against rain, UV, moisture and the mould and fungal growth that damp can bring, so a door resists fading, swelling and cracking for years. Whether you are sealing a new door before it is hung or reviving one that has started to weather, there is a finish here for it. They are made to protect our oak external doors and hardwood external doors alike.

The Finishes We Stock

Every finish here is made for outside. Our Osmo UV Protection Oil gives a micro-porous finish that lets timber breathe while repelling water and blocking UV, which keeps the natural grain on show. Our Impranol coating adds a durable, water-repellent layer that will not crack, blister or peel. Clear oils enhance the grain with little change of colour, while tinted oils and coloured coatings add tone, so you can protect the door and set its look in one job.

How to Treat Your Door

For the best results, treat every face and edge, including the top and bottom, before the door is hung, as bare edges are where moisture gets in. Re-coat once a year, or whenever the finish starts to look dry, and expect a south or south-west facing entrance to need it more often. A porch or canopy over the door will help any finish last longer. For a step-by-step, read our guide on how to treat external wood doors.

FAQs

For most timber doors an exterior oil such as Osmo UV Protection Oil, or a protective coating like Impranol, works well, guarding against moisture and UV while letting the wood breathe. Choose by the look you want and how exposed the door is.

Around once a year, or whenever the finish starts to look dry or dull. South and south-west facing doors that take the most weather may need it more often.