Helps Prevent the seals from drying out and the valves from sticking during long periods of storage. Very simple and fast to use. For use in all brands of pressure washers prior to long periods of storage. Protects the pump from freezing over the winter. Prior to long periods of storage attach the hose on the can to the inlet side of the pump, remove the cap and press down the button. When fluid comes through the outlet of the pump the process is complete. Remove the dispenser hose, replace the protective cap 6oz. Aerosol Bottle