Universal Oil with Fluorescent Leak Detection Leak Test UV Dye for Car AC A/C Auto Air Conditioning Pipeline Tracer Description: This dye is widely used by professional automotive technicians. It is a very effective way to detect leaks in any oil based system (engine oil, fuel system ,power steering,gearbox,gearbox,rear end etc.)Volume lt;60ml,1 bottle weighs about 55g. If you mind, please do not place an order, consider it before purchasing, we do not accept any 1-3 stars if you are not satisfied. If you want a more concentrated product for a better phenomenon, you can try this high concentration type. High concentration type Click here How to use? Putting this oil into the air conditioning system pipeline with injector through compressor Low pressure page (We have injector for sale. Click here). Then run the air conditioning system for about 10 minutes. Then find the leak by UV flashlight (We have UV flashlight for sale. Click here)