Cable sealing cap basic characteristics: a good seal. At the end of the cable storage for water, small size caps can also be used for joints such as the end of the deal street use: a. gross sand cable outer sheath, and clean the cables, then put the cable end caps; b. heating cable seal cap to shrink in the end of the cable, pay attention to the order; c. Heat-shrinkable end caps shrink full, overflow until the glue evenly.