Group R Compounds

SBR: styrene-butadiene
Commercial names: Buna Hüls (Chem. Werke Hüls), Buna S (Buna-Werk), Phioflex (Goodyear), Phiolite (Goodyear).
Styrene-butadiene rubber presents many variations of behaviour according to the loads that are added to the compound prior to the vulcanisation process. The most widely used variant in seal applications, it consents contact with glycol-based fluids, with a fairly stable behaviour for temperature intervals falling between 100°C and –50°C.

Temperature table
Maximum temperature
Minimum temperature
Fluid compatibility table
No compatible
  • Silicone oils and greases
  • Fluids for refrigeration
  • Glycol based fluids
  • Diluted acid, base and salt solutions
  • Mineral oils
  • Aliphatic, aromatic and chlorinated hydrocarbons
  • Oxygen, Ozone and oxidative agents
The Elastotech code for this compound is: ME04XX/YY.
Elastic compound for O-rings