Injection adapter for a spout of a fluid container used in sealing and/or insulation of electrical cable joints, the spout having an outer wall with at least one recess and a protrusion, the injection adapter comprising: a fluid conduit (100; 600) having an inlet neck (120; 620) with an inlet opening (110; 610) that is adapted to be inserted into the spout; and one or more clipping members (160; 660) arranged on an outer perimeter of the fluid conduit (100; 600) and oriented with free ends (164; 664) towards the inlet neck (120; 620); characterized in that said free ends (164; 664) are adapted to lock the fluid conduit (100; 600) to the spout, and the free end (164; 664) of each clipping member (160; 660) is adapted to be deflected outwards in a radial direction when mechanical force is applied on said free end (164; 664) along a non-radial direction for unlocking the respective clipping member (160; 660) from the spout, wherein the free end (164; 664) of each clipping member (160; 660) includes a locking protrusion and an unlocking protrusion that project radially towards the fluid conduit (100; 600), said locking protrusion being adapted to snap into one of the at least one recess of the spout when the inlet neck (120; 620) is inserted into the spout, and said unlocking protrusion comprises an oblique face that is inclined with respect to a plane parallel to a longitudinal axis of the fluid conduit (100; 600) such as to cause the free end (164; 664) of the respective clipping member (160; 660) to be pushed radially outwards under application of mechanical force on said oblique face along a non-radial direction that is transverse to both the longitudinal direction and the radial direction. a fluid conduit (100; 600) having an inlet neck (120; 620) with an inlet opening (110; 610) that is adapted to be inserted into the spout; and one or more clipping members (160; 660) arranged on an outer perimeter of the fluid conduit (100; 600) and oriented with free ends (164; 664) towards the inlet neck (120; 620); characterized in that said free ends (164; 664) are adapted to lock the fluid conduit (100; 600) to the spout, and the free end (164; 664) of each clipping member (160; 660) is adapted to be deflected outwards in a radial direction when mechanical force is applied on said free end (164; 664) along a non-radial direction for unlocking the respective clipping member (160; 660) from the spout, wherein the free end (164; 664) of each clipping member (160; 660) includes a locking protrusion and an unlocking protrusion that project radially towards the fluid conduit (100; 600), said locking protrusion being adapted to snap into one of the at least one recess of the spout when the inlet neck (120; 620) is inserted into the spout, and said unlocking protrusion comprises an oblique face that is inclined with respect to a plane parallel to a longitudinal axis of the fluid conduit (100; 600) such as to cause the free end (164; 664) of the respective clipping member (160; 660) to be pushed radially outwards under application of mechanical force on said oblique face along a non-radial direction that is transverse to both the longitudinal direction and the radial direction.