A blacktop patch is a hot asphalt mix that is heated and poured into an area to repair potholes, cracks, or other damage. It bonds strongly with the existing asphalt and provides a permanent solution. On the other hand, the cold patch is made of hard materials like stone dust and tar emulsion, which are mixed without heat. This material does not bond well with existing asphalt, so it may need to be reapplied more often than a blacktop patch for long-term repairs.