Prep Wood Filler is a water based interior wood filler suitable for all timber types and timber by-products. Available in a variety of colours for all timber types it - Takes stain/paint evenly Easy to use Dries quickly Water clean up Made in Australia Uses The wood filler is suitable for filling cracks, holes, end grain and edges in timber. Once set, the wood filler can be sanded, screwed and nailed. The Ebony colour is great for gum vein filling as the jet black colour works well in modern-look furniture. The Natural colour is ideal for building your own unique colour as it does not have any pigments, allowing it to be stained and coerced better than the other colours.