Penetrates, dissolves, and removes the toughest tar and asphalt products. It performs much better, quicker and evaporates slower than either diesel or citrus based products. As a result, it continues to work for a longer period as well. Non-flammable and 100% biodegradable. Safe for use across a wide variety of applications and industries. Diesel fuel works but is dangerous. This product works like diesel but is legal.