Iyo cylinder pad, inozivikanwawo se cylinder liner, iri pakati pemusoro wecylinder uye cylinder block. Basa rayo nderekuzadza ma microscopic pores pakati pe cylinder musoro uye cylinder musoro, kuve nechokwadi chekuisa chisimbiso panzvimbo yakabatana, uyezve kuve nechokwadi chekuvharwa kwekamuri yekupisa, kudzivirira kubuda kwemhepo uye bhachi remvura kubuda kwemvura. Zvinoenderana nemhando dzakasiyana-siyana, cylinder gaskets inogona kukamurwa kuita simbi - asbestos gaskets, simbi - composite gaskets uye ese simbi gaskets. Silinda pad chisimbiso pakati pepamusoro pemuviri uye pasi pemusoro wecylinder. Basa rayo nderekuchengetedza cylinder seal haina kudonha, chengetedza iyo inotonhorera uye mafuta anoyerera kubva mumuviri kuenda kumusoro wecylinder haabvisike. Iyo cylinder pad inotakura kudzvanywa kunokonzerwa nekusimbisa cylinder musoro bhaudhi, uye inoiswa kune yakanyanya tembiricha uye yakanyanya kudzvanywa gasi rinopisa mucylinder, pamwe nekuora kwemafuta uye inotonhorera.
Iyo gaspad ichave ine simba rakakwana uye ichave inoshingirira kune mafaro, kupisa uye ngura. Mukuwedzera, imwe chiyero che elasticity inodiwa kubhadhara kushata uye kusaenzana kwepamusoro pepamusoro pemuviri uye nechepasi pemusoro we cylinder, pamwe nekushanduka kwe cylinder musoro kana injini iri kushanda.