Also known as Buna S, or GR-S (Government Rubber-Styrene), Styrene Butadiene was the elastomer substituted for Natural Rubber during World War II. Compounded properties are similar to those of Natural Rubber.
Standard Compound: -50°F to +212°F. (Dry Heat Only)
Hardness (Shore A)
40 to 90.
The main use for Styrene Butadiene today is in the manufacture of automobile tires.
SBR is not recommended for exposure to petroleum oils, most hydrocarbons, strong acids, or ozone.
This material is seldom used in modern sealing applications. It has been replaced by better performing materials.