Silin din Silinda, wanda kuma aka sani da silima lilin, yana tsakanin shugaban silinda da kuma toshe silinda. Aikinsa shine cike da pores na microscopic tsakanin gidan silinda, don tabbatar da hatimin ɗakin haɗin gwiwa, sannan don tabbatar da hatimin ɗakin haɓakawa, don hana ƙawancen iska, don hana ƙirar iska da ruwa. A cewar daban-daban kayan, za a iya raba gas na silima cikin ƙarfe - tashar jiragen ruwa na Asbestos, ƙarfe - gas - gasasshen kayan kwalliya. Silin din Silinda shine hatimi tsakanin saman jiki da kasan shugaban silinda. Matsayinta shine kiyaye hatimi na silinda baya yadudduka, ci gaba da coolant da mai daga jiki zuwa shugaban silinda baya gudana. Putharfin silima yana ɗaukar matsin mai da aka haifar ta hanyar ɗaure gidan silinda, kuma an sanya shi zuwa babban zafin gas a cikin silinda, da kuma lalata daga mai da sanyaya.
Hasepad zai zama karfin ƙarfi kuma zai iya jure jin daɗi, zafi da lalata. Bugu da kari, ana buƙatar wani adadin elasticity don rama ga m na jiki da kuma kasan saman shugaban silinder lokacin da injin din yake aiki
