Which Wood Filler Should I Choose?
The best wood filler depends on the location, depth and type of repair. Before ordering, check whether the product is suitable for interior or exterior use and whether you need a ready-mixed or two-part formula.
Ready-Mixed Wood Fillers
Ready-mixed wood filler is convenient for small holes, cracks and surface imperfections. It can normally be applied straight from the container, making it useful for everyday decorating repairs before sanding and painting.
Two-Part Wood Fillers
Two-part wood fillers combine a filler with a separate hardener. They cure to form a strong repair and are often better suited to deep holes, damaged edges and more demanding interior or exterior work. Once fully cured, selected products can be sanded, drilled, screwed or shaped.
Interior Wood Repairs
Use wood filler to prepare doors, skirting boards, architraves, window frames and furniture before decorating. A smooth repair helps create a more even surface underneath paint, varnish or another suitable finish.
Exterior Wood Repairs
Exterior timber faces changing temperatures, moisture and movement. Choose a filler specifically approved for outdoor use and make sure the timber is clean, dry and sound before application. Remove loose or rotten material before beginning the repair.
How to Apply Wood Filler
- Remove dirt, dust, loose paint and damaged timber from the area.
- Make sure the surface is clean and dry.
- Prepare or mix the filler according to the manufacturer’s instructions.
- Press the filler firmly into the repair using a filling knife or scraper.
- Allow it to dry or cure fully.
- Sand the repair smooth before applying your chosen finish.
Always follow the instructions provided with the individual product, as application methods and drying times can vary.
Wood Filler FAQs
Can wood filler be used outside?
Some wood fillers are suitable for both interior and exterior use, but not every product is weather-resistant. Check the individual product information before using it outdoors.
Can I paint over wood filler?
Most wood fillers can be sanded and painted once they are fully dry. Make sure the repair is smooth and remove sanding dust before applying primer or paint.
Which filler is best for deep holes in wood?
A two-part, high-performance wood filler is usually the better choice for deep holes and larger repairs. These products cure more firmly than many standard ready-mixed fillers.
Can wood filler repair rotten timber?
Loose or badly decayed timber should be removed before filling. If the remaining wood is soft, it may also need treatment with a suitable wood hardener before the filler is applied.
How long does wood filler take to dry?
Drying times depend on the product, repair depth and surrounding conditions. Some two-part fillers can dry in around 30 minutes, while ready-mixed products may take longer. Always check the manufacturer’s instructions.
Browse wood fillers from Ronseal, Toupret, DAP and System Three, with UK delivery and Click & Collect available from participating LDM Direct stores.
