Rabala ndi chinthu cholimba kwambiri cha polima chomwe chimasinthasintha mosavuta.

Ndi yotanuka pa kutentha kwa mkati ndipo imatha kupanga kusintha kwakukulu pogwiritsa ntchito mphamvu yaying'ono yakunja.Ikhoza kubwerera ku mkhalidwe wake wakale ikachotsedwa mphamvu yakunja.

Pali mitundu yambiri ya rabara kuphatikizapo EPDM, Neoprene Rubber, Viton, Natural Rubber, Nitrile Rubber, Butyl Rubber, Timprene, Synthetic Rubber, ndi zina zotero.