Best Brush for Decking Oil for Long-Lasting Protection: 2025 Expert Review
DR Joinery
Expert Joiner & Timber Specialist
Applying decking oil is one of those jobs most homeowners put off, but in our damp UK climate, it is absolutely vital for the longevity of your timber. If you leave softwood decking unprotected through a wet Yorkshire winter, you'll be dealing with rot and algae by spring.
Many people make the mistake of using a cheap, standard paint brush or a roller that skates over the surface. However, traditional grooved decking requires a specific type of brush to work the oil deep into the timber grain and between the ridges where water likes to sit.
In this review, I'll recommend three brushes that make this laborious task easier. I've chosen a budget option for smaller touch-ups, a premium tool for professional finishes, and a specialised wide brush that specifically tackles the problem of deep deck grooves.
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Specs vs. The Real World
The Spec: "Roller vs Brush Speed"
"Rollers are faster for covering large areas."
Whilst rollers are quick, they miss the gaps and grooves. You almost always have to back-brush afterwards. A wide block brush does it properly in one pass.
The Spec: "Universal Thread Fit"
"Extension pole heads fit all standard handles."
Thread sizes vary wildly between brands. If the fit is loose, wrap the pole thread in masking tape to create a snug fit so the brush doesn't wobble.
My Top 3 Recommendations
Three options to cover different needs and budgets
2 Pcs Fence Block Brush Set for Large Paint Brush
TJVNM
If you have a small courtyard deck or need to handle intricate balustrades and handrails, this 2-piece set is excellent value. Whilst it doesn't attach to a pole, the hand-held grip offers good control for detailed work.
The Good
- Extremely affordable at under £5
- Includes a pot hook to keep things tidy
- decent bristle retention for the price
The Bad
- Not suitable for extension poles (hard on the back for floors)
- Slower coverage than 7-inch block brushes
Installer Tip:
Use these specifically for the 'cut in' work around the edges of the deck and for the spindles, then switch to a larger pole-mounted brush for the main deck boards to save time.
Priced at £4.99 at the time of writing
Check Price on AmazonROLLINGDOG Decking Paint Brush-7 Inch Decking Oil Brush
ROLLINGDOG
This is a serious tool for those who care about finish quality. The angled handle is a brilliant design feature that keeps the bristles in better contact with the boards when using an extension pole. The fine-tipped filaments ensure a smoother application of oil without puddling.
The Good
- Angled head provides superior ergonomics
- Fine filament tips reduce brush marks
- Holds a significant amount of oil
The Bad
- Significantly more expensive than standard block brushes
- Doesn't include the pole (head only)
Installer Tip:
Because the bristles are finer, this brush is excellent for smooth hardwood decks (like Ipe or Balau) or high-quality softwoods where you want a furniture-grade finish rather than a rustic one.
Priced at £24.99 at the time of writing
Check Price on AmazonProDec 7 inch High Capacity Block Decking Brush
ProDec
The biggest problem with oiling decking is getting the liquid deep into the grooves of standard timber boards. ProDec has solved this with extra-long bristles that act like wicks, pushing the oil right down into the channels where rot usually starts.
The Good
- Long bristles reach deep into decking grooves
- Wide 7-inch head covers ground very quickly
- Heavy-duty connector for screw-fit poles
The Bad
- Can become heavy when fully loaded with oil
- Extension pole not included
Installer Tip:
Don't just drag the brush; apply a little downward pressure. The long bristles will splay into the grooves, ensuring the sides of the ridges get coated, not just the top surface.
Priced at £12.13 at the time of writing
Check Price on AmazonFrequently Asked Questions
Should I use a brush or a sprayer for decking oil?
How do I clean decking oil from my brush?
Can I use these brushes for fence panels too?
How often should I oil my deck in the UK?
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