Used for the first time and just doesn't work. There is nothing in the hose that puts pressure on the valve. So when you attach it and turn on the compressor, the pressure rises, the bottle expands, and the sealant oozes out everywhere. Some sealant got into the tire but it was almost gone and the tire was not inflated. It seems that the design of the hose is not suitable for use. Had high hopes but wouldn't buy again, just leaves you stranded. (* I definitely followed the instructions exactly. "Choose air + sealant", "Screw the air/sealant hose onto the tire valve stem", connect, press the green button)