A high quality material which shrinks to 1/2 its size.  Polyolefin is stable, and can be stored for extended periods of time without shrinkage.  Extra heavy duty crosslinked material is excellent for use over battery cables and terminals  When heated, the sealant flows and physically encapsulates, creating a waterproof and contamination free connection.  Pieces are 1 foot in length.  Available in the following diameters:  1/2", 3/4", 1", and 1 1/2".