This document specifies the gasket parameters required by EN 1591-1 and provides the test procedures for establishing the values of these parameters. Gaskets which are wholly based upon elastomers, or based upon elastomers with only the inclusion of particulate fillers or particulate reinforcement, as opposed to gaskets combining elastomers, fillers and fibrous reinforcement, are beyond the scope of this document. NOTE The testing procedures given might be applicable to gaskets of other shapes and dimensions.