Profiled leak-before-press sealing ring for leaving free empty leaking spaces between a socket and a pipe end of a press fitting in a non-compressed state, comprising: - a plurality of first type ring portions; and - a plurality of second type ring portions, wherein the first and second type ring portions (RP1, RP2) lie alternating around a center axis, wherein the first type ring portions each extend arc-shaped around the center axis, and wherein the second type ring portions each extend linear-shaped with a straight inner surface and with a straight outer surface in a tangential direction that is perpendicular to a radial direction going through the center axis, characterized in that, the arc-shaped first type ring portions each have a curved inner surface of a constant radius (R1i) around the center axis and a curved outer surface of a constant radius (R1o) around the center axis, the ring further comprises: - a plurality of third type ring portions, wherein the third type ring portions extend arc-shaped in between respective ones of the arc-shaped first and linear-shaped second type ring portions (RP1, RP2), wherein the arc-shaped third type ring portions each connect with one of its head ends to a head end of a neighbouring one of the arc-shaped first type ring portions, and with an opposing one of its head ends to a head end of a neighbouring one of the linear-shaped second type ring portions, and wherein the arc-shaped first, the linear-shaped second, and the arc-shaped third type ring portions (RP1, RP2, RP3) all have a same evenly large dimensioned cross-sectional shape. - a plurality of first type ring portions; and - a plurality of second type ring portions, wherein the first and second type ring portions (RP1, RP2) lie alternating around a center axis, wherein the first type ring portions each extend arc-shaped around the center axis, and wherein the second type ring portions each extend linear-shaped with a straight inner surface and with a straight outer surface in a tangential direction that is perpendicular to a radial direction going through the center axis, characterized in that, the arc-shaped first type ring portions each have a curved inner surface of a constant radius (R1i) around the center axis and a curved outer surface of a constant radius (R1o) around the center axis, the ring further comprises: - a plurality of third type ring portions, wherein the third type ring portions extend arc-shaped in between respective ones of the arc-shaped first and linear-shaped second type ring portions (RP1, RP2), wherein the arc-shaped third type ring portions each connect with one of its head ends to a head end of a neighbouring one of the arc-shaped first type ring portions, and with an opposing one of its head ends to a head end of a neighbouring one of the linear-shaped second type ring portions, and wherein the arc-shaped first, the linear-shaped second, and the arc-shaped third type ring portions (RP1, RP2, RP3) all have a same evenly large dimensioned cross-sectional shape. wherein the first and second type ring portions (RP1, RP2) lie alternating around a center axis, wherein the first type ring portions each extend arc-shaped around the center axis, and wherein the second type ring portions each extend linear-shaped with a straight inner surface and with a straight outer surface in a tangential direction that is perpendicular to a radial direction going through the center axis, characterized in that, the arc-shaped first type ring portions each have a curved inner surface of a constant radius (R1i) around the center axis and a curved outer surface of a constant radius (R1o) around the center axis, the ring further comprises: - a plurality of third type ring portions, - a plurality of third type ring portions, wherein the third type ring portions extend arc-shaped in between respective ones of the arc-shaped first and linear-shaped second type ring portions (RP1, RP2), wherein the arc-shaped third type ring portions each connect with one of its head ends to a head end of a neighbouring one of the arc-shaped first type ring portions, and with an opposing one of its head ends to a head end of a neighbouring one of the linear-shaped second type ring portions, and wherein the arc-shaped first, the linear-shaped second, and the arc-shaped third type ring portions (RP1, RP2, RP3) all have a same evenly large dimensioned cross-sectional shape.