Many aftermarket parts stores are selling a corrosion preventive kit that mostly consists of a set of felt washers. Their main purpose is to insulate the cable end from the battery and to some extent they do work. You simply install the washers under the proper cable end install the terminal and you are done. Do not use any grease or petroleum jelly here as this can melt and cause problems. The only drawback is on an older battery you may block the vent doubtful if there are many batteries around that would have this problem however. The other problem may be that the terminal will not go onto the post far enough to secure properly and of course these are only for top post batteries. I would not recommend them for rice burner cables that have the thin terminal as they tend to come apart and may cause a problem when used with this application. FYI After cleaning the cables and top of the battery, always clean off the top when cleaning cables, spray some clear lacquer on the terminals you will be amazed at how long they will stay clean when sealed this way.