Born from a time when auto body repair involved heat-shrinking metal and pouring lead, our Bondo body filler has been helping vehicle owners and auto body professionals for decades. This simple two-part solution includes a resin-based filler and a hardener. A tube of the hardener is included with Bondo body filler. The consistency of both compounds is creamy, but as the hardener is blended together with the filler it acts as a catalyst, creating a chemical reaction which cures the product. This fast-curing body filler spreads easily and will adhere to correctly prepared surfaces. Bondo body filler shapes in minutes and will accept as many reasonably applied applications as required to fill holes and deep scratches or dents. It is formulated to be non-shrinking and permanently durable. Once it has completely hardened - normally in 25 min or less - Bondo Body Filler can be sanded using various grits to achieve as smooth a finish as required. In addition to its uses in repairs of typical vehicle surfaces, the filler is also suitable for repairing other surfaces including wood, steel, aluminum, fiberglass and concrete. Bondo body filler products include directions that help you easily create just the right mix for your auto repair job and allow for same-day repairs.