GVI's heat shrink terminals create environmentally sealed connections, rings completely isolate the wire from the environment. Because of their configure ration the disconnects can only offer a partial seal, when properly applied. This sealing of the connection isolates it from contaminants such as salt water which would corrode copper wire. By preventing this corrosion, GVI's heat shrink terminals increase the useful life of the connection thus saving you expensive downtime and repair costs.These heat shrink terminals are ideal for use in hostile environments such as those encountered in the Marine, Trucking and Chemical Industries. They are also excellent for use in applications where high reliability is of the utmost importance.