A na-eji akara igwe eji eme ihe na ngwaọrụ igwe, ụgbọ mmiri, igwe eji eme ihe, igwe eji eme ihe, igwe eji eme ihe, na igwe ihe eji eme ihe, ọnụ ọgụgụ dị iche iche ngwa dị iche iche. O-rim akwara na mmanụ, acid na alkali, egweri, kemịkalụ kemịkalụ na gburugburu ndị ọzọ ka na-egwu ezigbo akara, ujo.

Nwere ike ikwu: ogige EPDM, ciment ciment, ogige fkm, ogige hnbr.
EPDM: S552; S552-1; S512f; Ter 4049; Ter 4043; SNT482; J-3012; J-3012; Cr212; Cr212; Cr212; Cr212; Cr212
; Cr212; Cr212; Cr212; Cr22;