Primer is the bonding and connecting material for making the road index line to employ the fusing dope,the prime can prevent the film from coming off and the strengthen the binding force between the film and the road surface.primer car is the assistant equipment for fusing index line making this machine chooses the gasoline engine as its power works with auto compressor with dryer to paint,improves the work efficiency,and reduces the labor intensity,it will not bring noise and pollution,the gun shelf direction bar can be adjusted upwards and downwards,it can conveniently adjust the width of the paint accurate,the machine is easy to operate and maintain,moreover,the service life is long.