(Revised 1979) The following pages are offered as a general guide to the suitability of various elastomers in use today for service in these chemicals and fluids. The criteria used for the ratings were primarily volume swell resistance, compression set resistance, and aging resistance. For the most part the ratings were arrived at from specific data or general agreement of the sources named below. In circumstances when no data or agreement was found, the ratings were arrived at by theory and analogy. In some cases, they are the considered opinion of experienced compounders. We cannot guarantee their accuracy nor assume responsibility for their use. Several factors must always be considered in using a rubber part in service. The most important as we see them are: A. The Temperature of Service: Higher temperatures increase the effect of all chemicals on polymers. The increase varies with the polymer and the chemical. A compound quite suitable at room temperature might fail miserably at elevated temperature. B. Conditions of Service: A compound that swells badly might still function well as a static seal yet fail in any dynamic applications. C. The Grade of the Polymer: Many types of polymers are available in different grades that vary greatly in chemical resistance. D. The Compound Itself: A Compound designed for other outstanding properties may be poorer in performance in a chemical than one designed especially for fluid resistance. In light of the above factors, it is always best to test. SFR's laboratory is available to assist in determining the proper elastomer for your company's specific application. -A blank means no data or insufficient evidence exist. TLARGI wishes to acknowledge Don Czechowicz, Student USC Department of Chemistry and Robert Barbarin, Chief Chemist, Parker Seal Company for compiling this table. The ratings are based, for the most part, on published literature provided by the various polymer suppliers, rubber manufacturers and sources listed below: -American Cyanamid Company -B. F. Goodrich Chemical Company -Copolymer Rubber & Chemical Corporation -Dow Corning Corporation -E. 1. DuPont de Nemours 8` Company -Federal Mogul Corporation -Goodyear Tire and Rubber Company -Handbook of Plastics and Elastomers, Harper -Malaysian Rubber Bureau -Parker Seal Company -Polysar Limited -Precision Rubber Products Corporation -Sargent Industries, Stillman Seal Division -Thiokol Corporation -3 M Company -Uniroyal Industries Products