Jonal Laboratories
High Temperature Silicone Rubber Seals & O-Rings for Aerospace
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Design Assistance
Chemistry
Fluorosilicone
Fluorocarbon
Urethane (Castable, Millable, Foam)
Nitriles
Chloroprene
Butyl
Ethylene-propylene
Natural Rubber
Styrene-butadiene
Laboratory
Quality
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Styrene-butadiene

S.B.R. is a copolymer of styrene and butadiene. Also known as Buna-S and G.R.S. (government rubber styrene) and was first produced under government control.  It was the elastomer substitute for natural rubber during World War II. Compounded properties are similar to those of natural rubber.

S.B.R. main use today is in the manufacture of automobile tires and seals for non-mineral oil based brake fluid.