Tubular liner for sewer rehabilitation, with at least: - one inner tubular film ; - with a resin-carrier layer surrounding the inner tubular film , wherein the resin is curable by means of UV radiation; - with a mechanically protective outer film system surrounding the resin-carrier layer , with at least one outer film (7a; 7a, 7b) extending in the longitudinal direction of the tubular liner , wherein the longitudinal edges of the outer film or the outer films are connected to each other in an overlapping manner in the circumferential direction of the tubular liner , wherein the at least one connecting point resulting from this, upon the elongation in the radial direction during the insertion of the tubular liner in a sewer to be rehabilitated, is elongated and may break, and wherein the at least one outer film (7a; 7b, 7c) features at least one layer that is essentially impermeable for UV radiation and, if applicable, visible light, characterized in that each of the at least one outer films (7a; 7b, 7c) features at least one layer made of a material that is mechanically very stable and is essentially not able to elongate or able to elongate only very poorly, wherein the at least one outer film (7a; 7b, 7c) is formed as a reinforced film, for example reinforced by a fabric, threads, fibers, grid or mesh, or formed as a reinforced fabric, in particular a PVC-reinforced fabric or a Kevlar (aramid fiber) fabric, and wherein the specified mechanical stability and poor ability to elongate of the at least one outer film (7a; 7b, 7c) are defined by one or more of the following mechanical properties: - the elongation at break in a longitudinal direction (εB) and elongation at break in a transverse direction (εB) in accordance with DIN EN ISO 527-3 and DIN EN ISO 527-3, respectively, is less than 200%, preferentially less than 100%, most preferentially less than 50%; - the trap tear resistance in a trapezoidal manner in a longitudinal direction or in a trapezoidal manner in a transverse direction in accordance with DIN 53363 and DIN 53363, respectively, is greater than 100 N, preferentially greater than 200 N; and/or - the puncture resistance in accordance with ASTM E 154 is greater than 300 N, preferentially greater than 500 N, in particular preferentially greater than 800 N. - one inner tubular film ; - with a resin-carrier layer surrounding the inner tubular film , wherein the resin is curable by means of UV radiation; - with a mechanically protective outer film system surrounding the resin-carrier layer , with at least one outer film (7a; 7a, 7b) extending in the longitudinal direction of the tubular liner , wherein the longitudinal edges of the outer film or the outer films are connected to each other in an overlapping manner in the circumferential direction of the tubular liner , wherein the at least one connecting point resulting from this, upon the elongation in the radial direction during the insertion of the tubular liner in a sewer to be rehabilitated, is elongated and may break, and wherein the at least one outer film (7a; 7b, 7c) features at least one layer that is essentially impermeable for UV radiation and, if applicable, visible light, - the elongation at break in a longitudinal direction (εB) and elongation at break in a transverse direction (εB) in accordance with DIN EN ISO 527-3 and DIN EN ISO 527-3, respectively, is less than 200%, preferentially less than 100%, most preferentially less than 50%; - the trap tear resistance in a trapezoidal manner in a longitudinal direction or in a trapezoidal manner in a transverse direction in accordance with DIN 53363 and DIN 53363, respectively, is greater than 100 N, preferentially greater than 200 N; and/or - the puncture resistance in accordance with ASTM E 154 is greater than 300 N, preferentially greater than 500 N, in particular preferentially greater than 800 N. <EOS>