This application is offered as a general guide to the suitability of various elastomers in use today for service in the chemicals and fluids listed. The ratings are based, for the most part, on published literature provided by the various polymer suppliers, rubber manufacturers and other industry sources.

The criteria used for the ratings were primarily volume swell resistance. For the most part the ratings were arrived at from specific data or general agreement of the above sources. In circumstances when no data or agreement were fast 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 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 at elevated temperature.

B.Conditions of Service: A compound that swells badly might still function well as a static seal yet fail in a dynamic application.

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: Compounds designed for a specific environmental condition may not be suitable for different environmental conditions.

In light of the above factors, it is always best to test.