Bondo wood filler is a permanent, fully paintable repair material for a broad range of projects inside and outside the home, ideal for almost any wood surface, the two-part wood filler forms a permanent bond and will not shrink, it cures fast, in as little as 15 mins it can be easily sanded by hand or power tools, Bondo wood filler is suitable for staining or painting in only 25 mins.Two-part filler bonds to wood surfaces for permanent, non-shrink repairsCures fast, sandable in 15 mins for fast same-day repairsTurns medium brown when mixed, helping blend with wood surfaces for consistent appearancePaintable, stainable