A system for sealing a cable connection against external elements includes a duct, a first sealing portion and a second sealing portion. The duct has first and second ends and is configured to internally accommodate at least one cable connection element and an end of a cable. The first sealing portion is engageable to the first end of the duct such that when the first sealing portion is engaged to the first end of the duct, a watertight seal is created. The second sealing portion is engageable to the second end of the duct such that when the second sealing portion is engaged to the second end of the duct and the end of the cable is engaged to the second sealing portion, a watertight seal is created between the second sealing portion and the second end of the duct and between the second sealing portion and the end of the cable.