Elastomers that are intended for, but not limited to, use in automotive applications, are designated by ASTM D 2000 on the basis of type (heat resistance) and class (oil resistance)
Resistances to special fluids or environment (fuels, water, ozone, etc) are also classified in similar manner. ASTM D1418 lists different polymers by an abbreviated coding system (NBR, EPDM, SBR, FKM, etc).
By utilizing this classification system, guidance is provided to the engineer in the section of practical, commercially available rubber materials, and to also provide a method for specifying these materials by use of a simple "line call-out" designation.
Standard compounds have been formulated to meet a number of laboratory and industry standards for wide range applications. Basic characteristics of standard compounds are given in Table 1