SYMPOSIA PAPER Published: 01 January 1999

Long-Term Serviceability of Elastomers in Modern Engine Coolants


The aging of elastomers in engine coolants after extended periods of service can be both a physical process (stress/strain relaxation) and/or a chemical change. Engine coolants are essentially aqueous and non-aqueous electrolytes coupled with inorganic inhibitor systems, as well as new organic acid systems. The long-term effects of this environment are reviewed. Chemical and functional tests are utilized to model these aging processes. This review will offer a better understanding of the long-term suitability of typical candidate elastomers.

Author Information

Bussem, H
Seals Eastern Inc., Red Bank, NJ
Farinella, AC
Seals Eastern Inc., Red Bank, NJ
Hertz, DL
Seals Eastern Inc., Red Bank, NJ
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Developed by Committee: D15
Pages: 142–167
DOI: 10.1520/STP38244S
ISBN-EB: 978-0-8031-5566-4
ISBN-13: 978-0-8031-2610-7