a single or multilayered film is presented having at least one layer that contains at least one thermoplastic olefin homo or copolymer , modified if need be . the layer contains additionally , at least one polyester . such film is used as a sliding film or preliner in trenchless pipe renovation using the tube lining technique in which the film is layed on the inner wall of an underground sewer pipe laid that will be renovated . an insertion pipe with a curable carrier material can be pulled in sliding fashion over the sliding film laid on the pipe .