Fillers

Fillers for Walls, Wood & Masonry – Interior & Exterior Repairs

Fillers are essential building supplies for repairing damaged or uneven surfaces, creating a solid base for finishing work. They fill holes, cracks, and level substrates across internal walls, ceilings, masonry, joinery, and facades. Options vary in drying time, strength, and method - ideal for skim coats, patching, deep fills, and reshaping.

Choose from lightweight, flexible, or high-strength two-part fillers, suitable for indoor and outdoor use. Ready-mixed and resin-based systems are available. Once cured, most can be sanded, primed, and painted. Available in smooth, coarse, and fibre-reinforced types, fillers suit everything from fine detailing to structural repairs. Use them for damp gaps, movement joints, or sealing windows and doors. Application is simple with a knife, trowel, or caulking gun. From DIY fixes to full renovations, these fillers offer reliable results with minimal effort.

Fillers FAQs

Can I paint over filler once it’s dry?

Yes, most fillers can be painted once fully dry. Some may require sanding first to ensure a smooth finish. It's always best to check the drying time and product instructions, and if you're painting with a water-based product, make sure the filler is fully cured to avoid flash-through or poor adhesion.

Do fillers crack or shrink after application?

Low-quality or incorrectly applied fillers may crack or shrink, especially in deep holes or flexible joints. To avoid this, use a filler formulated for the surface and depth you're working with. Two-part fillers and flexible formulations are less prone to movement or shrinkage.

Can I use filler in damp or humid environments?

Some fillers are suitable for use in damp or humid areas like bathrooms or kitchens, but always choose a moisture-resistant formulation. If you're filling a substrate that’s already damp, allow it to dry thoroughly unless the filler is explicitly rated for use on damp surfaces.

What tools do I need to apply filler properly?

Basic application usually requires a filling knife, scraper, or trowel. For deeper or structural repairs, a caulking gun may be needed for two-part or cartridge-based fillers. Sandpaper or sanding blocks are also useful for finishing the repair once the filler is dry.