A method and injection machine for producing a hollow product, such as a urisheath,use of the method for producing a urisheath as well as the urisheath. The machinecomprises an annular cavity for receiving a silicone material. The materialis injected in a cold state via a coldrun nozzle (20) and cured by heat in the cavity.The cavity has a narrow cross-sectional area over a substantial portion of thecavity and the cavity is connected to a venting area (13) . The cavity has an annularenlarged portion (18) at the proximal portion of the cavity, arranged adjacentsaid inlet (24) and a groove (14) at the distal portion of the cavity. The narrowcross-sectional area has a decreasing radial dimension towards the distal portionof the cavity. The surface of the cavity is grit blasted.
