Summary: To improve the properties of recycled PE for pipe applications, additions of nanoclay and adhesion promoter were done. The presence of the nanoclay Cloisite 93A and the polyethylene grafted with maleic anhydride in the compounds have promoted the thermal properties. The possible exfoliation/intercalation of the PE in the nanoclay layers increases the barrier properties and reduced permeation to oxidation agents. The melt flow index, the glass transition temperature and the initial decomposition temperature (TG) have decreased. The XRD analysis has presented increase of interplanar distance in the nanoclay layers. The FTIR analysis has showed a decrease in the oxidation peaks intensity. These results are indicators of nanocomposite/microcomposite formation.