Takalmin roba takalmi ne da aka yi da roba, kuma ana iya raba kayan roba zuwa roba na halitta ko roba na roba. Amfanin roba na halitta shi ne cewa yana da taushi sosai, kyakkyawan elasticity, ana iya daidaita shi da nau'ikan wasanni daban-daban, don yin rawar girgiza, amma rashin amfani kuma a bayyane yake cewa shine juriya na man fetur, tsufa na ozone da tsufa na iskar oxygen ba shi da kyau. Takalman wasanni na cikin gida galibi suna amfani da roba na halitta.

Shawara:

EPDM:S537-3;S537-2;J-2070;J-2080;TER 6235;TER 4548;