Polymeg is LyondellBasell&39;s brand of polytetramethylene ether glycol diols (PTMEG).  Polymeg PTMEG diols are a high performance class of polyether polyols, and are key components in many polyurethane formulations. Polymeg diols are available in three molecular weight grades depending on your specific requirements.  Polymeg diols offer superior dynamic properties compared to standard polypropylene glycol polyether polyols.