Mpira
Rubber ndi zinthu zotanuka kwambiri za polima zokhala ndi mapindikidwe osinthika.
Ndi zotanuka pa kutentha kwa m'nyumba ndipo zimatha kupanga mapindikidwe akuluakulu pansi pa mphamvu yaing'ono yakunja.Ikhoza kubwerera ku chikhalidwe chake choyambirira pambuyo pa kuchotsedwa kwa mphamvu yakunja.
Pali mitundu yambiri ya mphira kuphatikiza EPDM, Neoprene Rubber, Viton, Natural Rubber, Nitrile Rubber, Butyl Rubber, Timprene, Synthetic Rubber, etc.