10 bestExterior Wood Fillersof May 2025
112M consumers helped this year.
26% off
1
Everbuild Multipurpose Wood Filler – Suitable for Indoor and Outdoor Use – Sandable – Light Stainable – 250ml
Everbuild
10.0
13% off
2
Ronseal 6886271-HHW Smooth Finish Filler Multi-Purpose Ready Mixed 900g, White
Ronseal
10.0
3
Ronseal Wet Rot Wood Hardener 250ml
Ronseal
9.7
7% off
4
Rustins Wood Hardener for Rotted Wood - 250ml
RUSTINS
9.5
5
Ronseal 100g Multi-Purpose Wood Filler Tube - White
Ronseal
9.3
Other
Ronseal - Smooth Finish Exterior Multi Purpose Ready Mix Filler Tub 1.2 kg
Rustins AWOON250 Acrylic Wood Filler, Natural, 250 ml - Multi-Purpose Wood Repair Compound for Cracks, Gaps, & Surface Imperfections – Quick-Drying, Sandable, & Paintable for Interior & Exterior Use
Ronseal 35305 High Performance Wood Filler - White 550g
Roxil Wood Filler (Natural) 220 cm³ Coverage - Premium Quality: Fully Stainable, Vacuum Packed, Low Hazard Formulation, Superior Moulding and Sanding Properties. Easier, Smoother, Kinder.
6
Ronseal 35304 High Performance Wood Filler - Natural 550g
Ronseal
9.0
16% off
7
Ronseal MPWFD465 465 g Multi-Purpose Wood Filler Tub - Dark
Ronseal
8.7
8
Everbuild All Purpose Ready Mixed Filler – Interior And Exterior Use – White – 600g
Everbuild
8.5
9
Everbuild Multipurpose Wood Filler – Suitable for Indoor and Outdoor Use – Sandable – Light Oak – 250ml
Everbuild
8.2
14% off
10
Brummer Wood Filler Black 250g - The Original And Still The Best
Brummer
7.9
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A Guide to Selecting the Best Exterior Wood Fillers
Choosing the right exterior wood filler is crucial for maintaining the integrity and appearance of your outdoor wooden structures. Whether you're repairing cracks, filling holes, or preparing surfaces for painting, the right wood filler can make a significant difference in the longevity and aesthetics of your project. When selecting a wood filler, consider the type of wood you're working with, the environmental conditions it will face, and the specific needs of your project. Understanding the key specifications will help you make an informed decision.
Durability
Durability refers to how well the wood filler can withstand environmental factors such as moisture, temperature changes, and UV exposure. This is important because exterior wood fillers need to endure harsh outdoor conditions without breaking down or losing their effectiveness. Durability can be segmented into high, medium, and low. High durability fillers are ideal for areas exposed to severe weather, while medium durability fillers can be used in more sheltered areas. Low durability fillers are generally not recommended for exterior use. Consider the climate and exposure level of your project area to choose the right durability level.
Flexibility
Flexibility is the ability of the wood filler to expand and contract with the wood as it responds to temperature and humidity changes. This is crucial for preventing cracks and ensuring a long-lasting repair. Flexible fillers are typically better for exterior applications where wood movement is more pronounced. You can categorize flexibility into high, medium, and low. High flexibility fillers are suitable for areas with significant temperature fluctuations, while medium flexibility fillers work well in more stable climates. Low flexibility fillers may be used in areas with minimal environmental changes. Assess the typical weather conditions in your area to determine the necessary flexibility.
Drying Time
Drying time is the period it takes for the wood filler to harden and be ready for sanding or painting. This is important for planning your project timeline and ensuring efficient work progress. Drying time can be fast, moderate, or slow. Fast-drying fillers are great for quick repairs and projects with tight deadlines, while moderate drying fillers offer a balance between speed and workability. Slow drying fillers allow for more detailed work and adjustments but require more patience. Consider your project schedule and the complexity of the repair to choose the appropriate drying time.
Sandability
Sandability refers to how easily the wood filler can be sanded to achieve a smooth finish. This is important for achieving a seamless look and preparing the surface for painting or staining. Sandability can be categorized into easy, moderate, and difficult. Easy sandability fillers are ideal for projects requiring a fine finish, while moderate sandability fillers are suitable for general repairs. Difficult sandability fillers may be used for rough repairs where a perfect finish is not necessary. Consider the final appearance you desire and the level of finish required to select the right sandability.
Color Matching
Color matching is the ability of the wood filler to blend with the existing wood color, which is important for aesthetic purposes. This can be crucial for visible repairs where you want the filler to be inconspicuous. Color matching can be segmented into excellent, good, and poor. Excellent color matching fillers are perfect for high-visibility areas, while good color matching fillers work well for less prominent spots. Poor color matching fillers are generally used in areas that will be painted over or are not visible. Consider the visibility of the repair and the importance of aesthetics in your project to choose the right color matching.
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