A waterproof zip fastener (2, 90) comprising: a pair of tapes (4, 6, 94, 96); and coupling elements (12, 14, 98, 100) along adjacent edges (20, 22, 102, 104) of the tapes (4, 6, 94, 96), the coupling elements (12, 14, 98, 100) ending at an end point (33, 106), wherein the fastener tapes (4, 6, 94, 96) comprise: a layer (8, 10) of waterproof material on one or both sides of the tapes (4, 6, 94, 96), the waterproof layers (8, 10) of the respective tapes abutting to form a waterproof seal, an enlarged gap between the tape edges (20, 22, 102, 104) running from the end point (33, 106) to ends of the tapes (4, 6, 94, 96), the gap being larger than a gap between the edges (20, 22, 102, 104) of the tapes (4, 6, 94, 96) at a region occupied by the coupling elements (12, 14, 98, 100); and an end stop (26, 92) which is molded on the fastener tapes (4, 6, 94, 96) between the tape edges (20, 22, 102, 104) to cover the tape edges (20, 22, 102, 104) and which extends from the end point (33, 106) in a direction remote from the fastener coupling elements (12, 14, 98, 100) to fill the enlarged gap between the tape edges (20, 22, 102, 104) and to join the fastener tapes (4, 6, 94, 96), the end stop (26, 92) having a portion (34, 101) positioned to prevent a slider from coming off the coupling elements (12, 14, 98, 100) when it is reciprocated for coupling and decoupling the coupling elements, and wherein the moulded material of the end stop extends proud of the tape surface (16, 18) on at least one side of the fastener.. a pair of tapes (4, 6, 94, 96); and coupling elements (12, 14, 98, 100) along adjacent edges (20, 22, 102, 104) of the tapes (4, 6, 94, 96), the coupling elements (12, 14, 98, 100) ending at an end point (33, 106), wherein the fastener tapes (4, 6, 94, 96) comprise: a layer (8, 10) of waterproof material on one or both sides of the tapes (4, 6, 94, 96), the waterproof layers (8, 10) of the respective tapes abutting to form a waterproof seal, an enlarged gap between the tape edges (20, 22, 102, 104) running from the end point (33, 106) to ends of the tapes (4, 6, 94, 96), the gap being larger than a gap between the edges (20, 22, 102, 104) of the tapes (4, 6, 94, 96) at a region occupied by the coupling elements (12, 14, 98, 100); and an end stop (26, 92) which is molded on the fastener tapes (4, 6, 94, 96) between the tape edges (20, 22, 102, 104) to cover the tape edges (20, 22, 102, 104) and which extends from the end point (33, 106) in a direction remote from the fastener coupling elements (12, 14, 98, 100) to fill the enlarged gap between the tape edges (20, 22, 102, 104) and to join the fastener tapes (4, 6, 94, 96), the end stop (26, 92) having a portion (34, 101) positioned to prevent a slider from coming off the coupling elements (12, 14, 98, 100) when it is reciprocated for coupling and decoupling the coupling elements, and wherein the moulded material of the end stop extends proud of the tape surface (16, 18) on at least one side of the fastener.. a layer (8, 10) of waterproof material on one or both sides of the tapes (4, 6, 94, 96), the waterproof layers (8, 10) of the respective tapes abutting to form a waterproof seal, an enlarged gap between the tape edges (20, 22, 102, 104) running from the end point (33, 106) to ends of the tapes (4, 6, 94, 96), the gap being larger than a gap between the edges (20, 22, 102, 104) of the tapes (4, 6, 94, 96) at a region occupied by the coupling elements (12, 14, 98, 100); and an end stop (26, 92) which is molded on the fastener tapes (4, 6, 94, 96) between the tape edges (20, 22, 102, 104) to cover the tape edges (20, 22, 102, 104) and which extends from the end point (33, 106) in a direction remote from the fastener coupling elements (12, 14, 98, 100) to fill the enlarged gap between the tape edges (20, 22, 102, 104) and to join the fastener tapes (4, 6, 94, 96), the end stop (26, 92) having a portion (34, 101) positioned to prevent a slider from coming off the coupling elements (12, 14, 98, 100) when it is reciprocated for coupling and decoupling the coupling elements, and wherein the moulded material of the end stop extends proud of the tape surface (16, 18) on at least one side of the fastener..