Gaskets for the internal combustion engine are highly engineered and rigorously tested products. Their degree of sophistication has largely followed the degree of sophistication inherent in the engine. This paper presents a chronological history of the cylinder head gasket as it changed relative to engine changes. Depicted is the general theory of bolted joint sealing as related to head gaskets.The remaining engine gaskets are discussed in regard to their basic construction and material content. An introduction of the chemical gaskets used in internal combustion engines is also included.