The invention relates to novel multimodal polyethylene polymers comprising a low molecular weight fraction and a high molecular weight fraction, and having a MFR.sub.5 of greater than 0.10 g/10 min and less than or equal to 0.22 g/10 min, and a density of greater than equal to 952 kg/m.sup.3. The invention also relates to uses of the novel polymers in the production of polymeric articles, especially pipes.