There are a wide range of wood fillers including water-based, solvent-based, single-part, 2-pack, coloured and neutral, which is best is largely down to the type of project and the requirements of the filler. For example, flexible fillers are better for filling gaps between floorboards, 2-pack fillers are more durable and can be nailed and screwed. Gel fillers that are mixed with sanding dust can produce a more natural 'wood like' repair that can be sanded and stained to match the surrounding wood. See our full range of wood fillers to find the one that's best for your project.