3M 7100307657 - Bondo® Body Filler is a two-part putty compound used to repair dents, dings, holes, rusted areas and scratches in vehicle exteriors. The filler cures fast, shapes in minutes and is formulated to be non-shrinking and permanently durable. This is the original formula for quickly and easily repairing metal surfaces, as well as wood, fiberglass, concrete and more.