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In recent years, there have been significant innovations and improvements made in the field of automotive gasketing. They have occurred in both the mechanical and chemical gasketing field. This paper depicts some of these innovations and improvements and describes how they have affected the gasketing of automotive joints. Improvements in mechanical gaskets such as unbroken metal core reinforcement of gasket materials, new surface coatings for seal and abrasion resistance, and use of printed sealing beads are discussed. The sealing theory of chemical gasketing and some of the latest developments in this field are included. Factors to be considered in the selection of mechanical or chemical gaskets are enumerated.

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.