I-cylinder gasket itholakala phakathi kwekhanda le-cylinder kanye nomzimba we-cylinder, owaziwa nangokuthi umbhede wesilinda.Umsebenzi wawo ukugcwalisa ama-pores amancane phakathi kwe-cylinder block kanye nekhanda le-cylinder, ukuqinisekisa uphawu oluhle endaweni ehlanganisiwe, bese uqinisekisa uphawu lwegumbi lomlilo ukuvimbela ukuvuza kwe-cylinder nokuvuza kwamanzi.